DEEP HOLE DRILLING SYSTEMS SOLID CARBIDE TOOLS botek Präzisionsbohrtechnik GmbH Längenfeldstrasse 4 D-72585 Riederich T+49-(0)-7123-3808-0 F+49-(0)- 7123-38 08-138 E-mail[email protected]www.botek.de Trepanning tools Type 28 / Type 48 Deep hole drilling tools, system BTA with indexable inserts and guide pads for trepanningand solid drilling with redu ced powe r consumptio n / powe r input Drilli ng ran ge: 55 .00 - 412.99 mm botek
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Because of our experience, manufacturing deep hole drilling tools botek began to build carbide tools
in special designs for specific customer applications.
Our team of highly skilled engineers and application specialists makes botek your ideal partner for your
difficult cutting tool applications.
botek advantages:
1. Individual solutions to optimize and solve your application needs.
2. Special tools manufactured to customer specifications.
3. Accurate and professional advice.
4. Years of tooling experience and knowledge.
5. Overall performance optimized for your machinery.
6. Assured and consistent tool quality.
7. Production cost savings.
8. On time delivery.
9. Manufacturing process optimization.
10. Increased productivity.
11. Re-sharpening available by botek.
12. In-house coating service.
Our catalog displays only a small range and selection of our total special tool manufacturing variety.
Kindly submit your drawing or sketch for evaluation.
Please forward us your application information at [email protected] or phone +49-(0)-7123-3808-0
Special tools
• Our General Standard Terms and Conditions,which we assume as known,apply.
• We reserve the right to make modifications in the interests of technical improvement.Such modifications cannot,in principle, be accepted as justifiable grounds for complaint.
• Subject to change.The manufacturer accepts no responsibility for misprints and other errors.
1. High-performance tool due to high stability of the drill head body
2. Less spare parts needed due to reduced number of inserts and standardisedguide pads
3. Trouble free adjusting of intermediate diameters possible by changing the stopplate (available in increments of 0.01mm) and using shims for the guide pads
4. Easy exchange of indexable inserts and guide pads.No need to adjust setting within +- 0.01mm diameter
5. Peripheral inserts with 2 cutting edges, centre inserts with 6 cutting edges
6. Easy assembly onto the drill tube with an open-end wrench7. Various standard chip breakers for drilling a wide range of materials
8. Various combinations of carbide grades and coatings for inserts and guide pads
9. Drilling tolerance up to IT 8 is possible under favourable conditions
10. New chipbreaker design SP5 for general use and high feed rates
Drill heads will be adjusted to the ordered drill diameter in-house. Stop plate thickness "S”is engraved into the drill head body (see below)
Procedure:
Tools can be adjusted in diameter by using guide pad shims and exchanging the stop plate.
The maximum adjusting range is 0.25mm diameter.The thickness of all guide pad shims must be exactly the same.
The exact drill head diameter D1 is adjusted by exchanging the stop plate.
The difference between D1 and D2 must be at least 0.02mm and at most 0.06mm.D1 should be always bigger as D2.
Example:
The drill head 64-1121-000 with D1 = 45.00 should be adjusted to D1 = 45.22 mmEngraved in the head is a stop plate thickness S = 1.51 mm for a drill head diameter 45.00 mm.
For adjusting the drill head to the new diameter guide pad shims # 10-0800-4919/0.1mm thicknessand a stop plate # 01-2050-610-S1.63 are used.
Technical informationfor solid drill heads type 12 and 64
Type 12 and 64 are high-precision deep hole drilling tools with indexable inserts and
guide pads for use on deep hole drilling machines with BTA (STS) drilling system.Adjusting of tool diameter in increments of 0.01mm by changing inserts and puttinga shim underneath the guide pads.
The tools do have an adjusting range within 0.25mm (..,00 - ..,24mm) (..,25 - ..,49mm) (..,50 - ..,74mm)(..,75 - ..,99mm). For the smallest diameter of each drilling range no guide pad shims are used.
Tools with adjusting range (..,00 - ..,24mm) are available in a few working days.
Stop plate system
When using identical tools with exactly the same drill head diameter, the thicknessof the stop plate (dimension "S”) can vary due to manufacturing tolerances of themilled drill head body.
The needed thickness "S” for the ordered drill head diameter is therefore engraved
236 049 GB_Typ12+64.qxd • botek • Frau Schlierer • Broschüre Typ 12+64 • LACON design GmbH • Tel. 07543-9305-0 • IML • 2006-01-11 • Version 4 • Format 610 x 297 mm • Maßstab 1:1 • Seite 2
botek advantages Spare parts type 12/type 64
Type 12 Type 64
Available carbide grades and chip breakers
1.High-performance tool due to high st ability of the drill head body
2.Less spare parts need ed due to reduced number of inserts and standardisedguide pads
3.Trouble free adjusting of intermediate di ameters possible by changing the stopplate (available in increments of 0.01mm) and using shims for the guide pads
4.Easy exchange of indexable inserts and guide pads.No need to adjust setting within +- 0.01mm diameter
5.Peripheral inserts with 2 cutting edges, centre inserts with 6 cutting edges6.Easy assembly onto the drill tube wi th an open-end wrench
7.Various standard chip breakers for drilling a wide range of materials
8.Various combinations of carbide grades and coatings for inserts and guide pads
9.Drilling t olerance up to IT 8 is possible under favourable conditions
10.New chipbreaker design SP5 for general use and high feed rates
Type 12
Drill tube type 251-start connectionthread
Type 64
Drill tube type 454-start connectionthread
2) When ordering complete heads the peripheral insert
will be with a corner radius (version -315).
Peripheral inserts without this radius
(version 02-…-310) are on request.
Order example:
Solid drill head type 64Diameter 45.00 mm: 64-1121-000-D45.00.Please give carbide grades and chip breakersseperately.
L
D a
L
D a
Drill head bodyGuide pad-shim
Guide pad
Screw
Screw
Stop plate
Screw
Peripheral insert
Shim
Screw
Centre insert
Wrench size SW
Open endwrench
SW
24
26
28
30
32
36
38
41
46
50
60
65
Peripheral insert
Chip breakers
Centre insert
Chip breakers
Guidepads
Carbidegrade
SP1 SP2 SP5 SP1
P25
P25-B
P40
P40-B
K10
K10-B
P20
P20-B
" On stock,# On request,- Not available
#
"
#
"
"
"
-
-
#
"
#
#
#
#
-
-
#
"
#
"
#
#
-
-
#
"
#
"
"
"
-
-
-
-
-
-
#
#
"
#
28.50 - 29.99
30.00 - 31.99
32.00 - 33.99
34.00 - 36.99
37.00 - 39.99
40.00 - 43.99
44.00 - 46.99
47.00 - 51.99
52.00 - 56.99
57.00 - 60.99
61.00 - 67.99
68.00 - 74.99 1) Exact order number on request
12-05**-000
12-06**-000
12-07**-000
12-08**-000
12-09**-000
12-10**-000
12-11**-000
12-12**-000
12-13**-000
12-14**-000
99-121500-***
99-121700-***
12-05**-110
12-06**-110
12-07**-110
12-08**-110
12-09**-110
12-10**-110
12-11**-110
12-12**-110
12-13**-110
12-14**-110
99-121501-***
99-121701-***
05
06
07
08
09
10
11
12
13
14
15
17
24
26
28
30
33
36
39
43
47
51
56
62
63.1
63.1
63.1
79.1
80.2
81.2
81.2
88.5
90.5
95.5
98.8
104.9
Ø (mm)Drill headcomplete
1) Drill tubesize
Drill tubedia.(Da)
Over alllength (L)
Drill headbody
1)
Drilling rangefrom – up to
Sol id dr il li ng head type 12 Dri ll tube type 25with 1-start connection thead
28.71 - 31.00
31.01 - 33.30
33.31 - 36.20
36.21 - 39.60
39.61 - 43.00
43.01 - 47.00
47.01 - 51.70
51.71 - 56.20
56.21 - 60.60
60.61 - 60.99
61.00 - 65.00 1) Exact order number on request
64-06**-000
64-07**-000
64-08**-000
64-09**-000
64-10**-000
64-11**-000
64-12**-000
64-13**-000
64-14**-000
64-15**-000
99-641500-***
64-06**-110
64-07**-110
64-08**-110
64-09**-110
64-10**-110
64-11**-110
64-12**-110
64-13**-110
64-14**-110
64-15**-110
99-641501-***
06
07
08
09
10
11
12
13
14
15
15
26
28
30
33
36
39
43
47
51
56-1
56-1
73.1
74.1
74.1
83.2
85.2
93.4
90.5
96.5
102.5
105.7
105.7
Ø (mm)Drill headcomplete
1) Drilltube size
Drill tubedia.(Da)
Over alllength (L)
Drill headbody
1)
Drilling rangefrom – up to
Sol id dr il li ng head type 64 Dri ll tube type 45with 4-start connection thead
1. New, high-performance solid drill heads with a modern, user-friendly design.2. Very high operational efficiency combined with optimum cutting performance.
3. Ideally suited to deep hole drilling machines.
4. No regrinding needed.
5. Various indexable insert chip breakers are available according to material to be processed.Coated indexable inserts and guide pads are also available.
6. Easy exchange of indexable inserts and guide pads.No need to adjust setting within ± 0.01 mm diameter.
7. When using matching interchangeable parts, the drill head diameter may, however, be adjusted within a range of 1.0 mm.
8. Easy assembly onto the drill tube with an open-end wrench.
9. Drilling tolerance up to IT7 is possible under favourable conditions.
Type 11
Solid drill head system BTA1-start connection thread
Type 61
Solid drill head system BTA4-start connection thread
Information about botek solid drill heads Type 11/Type 61
- The chip breaker has a decisive part to play with the chip formation.
- To obtain trouble-free chip flow along with optimum tool life, it is essential to aim for the most ideal chip formation possible.
- The chips should be broken just short enough to ensure that there is no chip congestion in the flute or the drill.
- Excessively short, crushed chips place strain on the cutting edges and lead to premature wear and will destroy the cutting edge.
- For processing commonly used materials, indexable inserts are available from stock with chip breakers SP 1 or SP 2.
- Unalloyed steels C>0.2 - Unalloyed steels C<0.2 - According to b, t, r, or drawing- Alloyed steels - Long chip-forming special steels- Toughened steels - Stainless and acid-proof steels- Case hardened steels- Tool steels- Stainless and acid-proof steels
Guide values for solid drilling of various materials:
Guide values for cutting speed and feed rate are shown in the table below.
As there are many factors that can affect the results of deep-hole drilling, these values must be corrected if necessary.
40322516
12,5
10
8
6,3
5
4
20
f = 0. 1 0 ( m m
/ U )
f = 0. 0 8 ( m m / U
)
f = 0. 1 2 5
( m m / U )
f = 0. 1 6 (
m m / U )
S p i n d l e p o w e r ( k W )
Drill diameter (mm)
20
4
5
6,3
8
10
16 25 32 40
/
/
f = 0. 1 6
( m m / U )
f = 0. 1 2 5
( m m / U )
f = 0. 1 0 ( m
m / U )
f = 0. 0 8 ( m m
/ U )
F e e d f o r c e ( k N )
Drill diameter (mm)
20
63
80
100
120
160
16 25 32 40
/
/
S p i n d l e p o w e r ( l / m i n )
Drill diameter (mm)
40322516
50
40
32
25
20
20
/
/
F e e d f o r c e ( b a r )
Drill diameter (mm)
Performance diagrams
These values are guide values for drillingalloyed steel rated ~800 N/mm2 and may vary depending on workpiecematerial and characteristics, as well astool condition.
Coolant information
Correct chip removal is only assured if the
coolant is supplied to the tool in sufficientquantity and under sufficient pressure.
1. An efficient coolant and filtration system with a filtration of 20 µm to 30 µm(the smaller the diameter, the better the coolant and filtration should be).
2. Suitable coolant, i. e. deep hole drilling oil or emulsion (min. 6 % concentration,with additives) has to be provided in sufficient quantity and pressure.Minimum quantity lubrication (MQL) is also possible.
3. Guidance with a pilot hole in the workpiece.
Machining sequence:
1. Drill pilot hole(for size see table “Dimensions for the guide hole”).k We recommend to use botek pilot drills Type 153
2. The twist drill is fed into pilot hole while non rotating
or rotated slowly at < 200 RPM.3. Switch on the coolant.
4. Switch on RPM and feed.
5. After reaching the drilling depth switch off the RPM.
6. Switch off the coolant pump.
7. Fast retract with the spindle stopped or slowly rotated< 50 RPM. Please see our safety instructions (page 9).
2. Drill pilot hole (for size see table “Dimensions for the guide hole”).k We recommend to use botek pilot drills Type 158
3. The twist drill is fed into pilot hole while non rotating or rotatedslowly at < 200 RPM.
4. Switch on the coolant.
5. Switch on RPM and feed.
6. After reaching the drilling depth switch off the RPM.
7. Switch off the coolant.
8. Fast retract with the spindle stopped or slowly rotated < 50 RPM.
The mentioned values are guide values. The maximum possible values depend on the diameter and length ratio of the tool.
The carbide twist drill is a self centering drilling tool. However, a guidance by means of a pilot hole is necessary. Drill lengthsexceeding 15 x Dia., high feed rates while drilling and the resulting deflection forces might cause tool breakage.
Quality and accuracy of the pilot hole affect tool life and centreline deviation.
Application requirementsfor carbide twist drills
Drill diameter (mm)
Dimensions for the guide hole
L (mm)
D (mm)
for very precise hole quality
3.000 – 14.000 mm app. 1.5 x D D + 0.01 to 0.02 mm
To achieve optimum drilling results when using solid carbide twist drills, various criteria must be applied.In addition to tool design, key factors are machine design and construction, process techniques, pressurized and filtereddeep hole drilling coolant. Selection of proper cutting parameters is also a significant factor.
The key factors botek considers when designing gundrills:
- Material type
- Diameter, tolerance and surface finish
- Suitable carbide grade
- Nose grind geometry
In addition to our refined manufacturing and technology for consistent product quality, our application and technicalexperience help you realize optimal solutions.
1. Before using the drills make sure the machine has the necessary equipment to do proper deep hole drilling.The machine should have suitable safety guarding for protection from cutting chips and coolant for operator. Check with machine builder!
2. Improper use or handling of deep hole drilling tools can cause serious injuries,e.g. skin cuts from the cutting edge
3. Operating instructions
4. The twist drill is fed into drill bush or pilot hole while non rotating or rotated slowly at < 50 RPM.Then the coolant and the machine spindle should get started.
5. Consequences of failure to comply with our usage instructions 1 – 4
If our deep drilling tools are incorrectly used and our usagerecommendations are not followed correctly, people may beinjured and/or property may be damaged.
There is a risk of fatal injury if the tool breaks andflies through the air in an uncontrolled way!
Please note that all of the usage instructions and values are recommendations only. We are not liable for damageresulting from incorrect handling of our deep drilling tools, operating mistakes, substandard mechanicalrequirements or improper use of our tools!
Do you have any questions? Please call us on T +49-(0)-7123-3808-0. We would be pleased to advise you.
2. botek quality tools are synonymous with high cutting performance. 3. Minimum centerline deviation.
4. Outstanding drilling quality and trouble-free chip removal.
5. High process reliability.
6. Tool lengths up to 5,000 mm are available depending on tool type and tool dia.
7. Diametric tolerances up to IT 7 are possible under specific conditions.
8. Suitable for use on machining centres and turning machines with high pressure coolant system.
9. Minimum quantity lubrication (MQL) is possible under certain conditions.
10. Drills can be used horizontally or vertically with either tool, workpiece or counterrotation.
11. Tools can be reground at botek’s factory or in your facility (see brochure: botek grinding machines and accessories). 12. Gundrills are optimally adapted by botek to machining requirements in close cooperation with the customer.
13. Each of our tools is the product of over 30 years’ experience in deep hole drill production and applications.
14. We develop and manufacture tools for all deep hole drilling processes (Gundrilling, BTA and Ejector).
15. The solid carbide single flute gundrill (Type 113) was developed and manufactured by botek since 1982.This innovative technology made it possible, for the first time, gundrilling down to diameters less than 2 mm.This capability is, among other things, a prerequisite for the production of modern fuel injection systems.
16. botek is the world market leader in the field of single flute gundrills.
The characteristic of the single flute gundrilling process is that coolant is fed through the coolant hole in the tool and exits along with
the chips in the V-shaped groove (flute) on the drill tube from the drilled hole. The coolant also provides lubrication to the drill periphery.This is possible if coolant, i.e. deep-hole drilling oil or emulsion (min. 10 - 12% concentration, with additives), is provided insufficient quantity and pressure (coolant information see page 18 - 23).
Minimum quantity lubrication (MQL) may be used under certain conditions.
High pressure coolant systems should already be integrated in the machine or can be provided as a separate unit by themachine’s manufacturer. Economical deep-hole drilling is therefore, not only possible on special deep-hole drilling machinesbut also on CNC machining centres (lathes, horizontal boring machines, etc.).
Information on the guide hole (pilot hole)
with drill bush
with pilot hole
The gundrill is a single-edged toolwithout self-centering.When positioning the drill, the tool must be guided through a drill bush or a pilot hole.
The quality of the pilot hole affects the drillingperformance (tool life, centerline deviation, etc.).
Drill diameterPilot holediameter
Pilot hole depth matched to the tool length (without driver)
4.001 mm - 12.000 mm + 0.010 to + 0.020 ap. 30xD 3.0 x D 3.0 x D 3.5 x D
ap. 40xD 4.0 x D 4.0 x D
40 mmap. 50xD
6.0 x D
6.0 x D
35 mmap. 60xD30 mm
> 60xD
The dimensions specified in the table are guide values. To avoid chipping of the cutting edge, a chamfered pilot hole (F) isrecommended depending on machining requirements.
Please read our application notes on page 24 + 25
Dimensions for the pilot hole Type 113/113-HP
Drill diameterPilot holediameter
Pilot hole depth matched to the tool length (without driver)
LxDdrillingdepth
Pilot hole depth
Ø 1.850- 4.000
Ø 4.001- 8.500
Ø 8.501- 12.000
Ø 12.001- 20.999
Ø 21.000- 30.999
Ø 31.000- 40.999
Ø 41.000- 55.000
1.85 mm - 4.00 mm + 0.005 to + 0.010 ap. 10xD 2.0 x D 1.0 x D 1.0 x D 1.0 x D
1 x D1 x D
1 x D4.01 mm - 12.00 mm + 0.010 to + 0.020 ap. 20xD 3.0 x D 1.5 x D 1.5 x D 1.5 x D
12.01 mm - 50.00 mm + 0.015 to + 0.040 ap. 25xD 4.0 x D 2.0 x D 2.0 x D 1.5 x D
kidney-shaped coolant channelfor tool dia.: 0.500 - 12.000 mm
Type 113-HPSolid carbide gundrill
kidney-shaped coolant channelfor tool dia.: 0.700 - 12.000 mm
Type 113-01*solid carbide stepped drill
kidney-shaped coolant channelfor tool dia.: 1.500 - ... mm
Type 113-02solid carbide counterboring tool
kidney-shaped coolant channelfor tool dia.: 0.500 - 12.000 mm
*Tool on request only
Overview
Nose grind geometry
The nose grind geometry affect the following, hole tolerance, chip formation, coolant pressure and flow, tool life, centerline deviationand surface quality. Over the years, botek has successfully tested a number of different nose grinds for drilling various materials.
botek`s experience has formed the foundation for the development of our standard nose grind geometries. This meets the require-ments of most drilling applications. Deep hole drilling of especially long chipping materials and difficult to machine materials usuallycall for special nose grind geometries, and in some cases, made to order chip breakers, all available from botek.
Standard nose grinds for Type 113
Nose grind no. 001/1 (SA-0009)for drill range: 0.500 - 4.000 mm
Nose grind no. 002 (SA-0002)for drill range: 4.001 - 12.000 mm
Tool design
Drill tip and drill tube are manufactured from a single piece of carbide blank. The advantage of this tool is high processreliability and performance. Longer tool life is possible because of reduced torsional vibrations and higher rigidity.
With this tool type, the driver (steel) has a ”pin”. The driver and the drill tube are connected by a brazed joint.
Type 113-HP (Patent pending)High performance tool design newly developed ALTERNATIVE SOLUTION to carbide twist drills
Advantages - Maximum cutting performance- Up to 800% higher feed rates- Very efficient for drilling long chipping steels- Fast and cost effective regrinding
Suitable for drilling with cutting oil,MQL and high quality emulsion.
Material AlSi7Mg0,3 T73 42CrMo4 38MnSV4 50CrMo4
Diameter x drilling depth 7.0 x 210 mm 5.0 x 100 mm 5.0 x 100 mm 3.0 x 95 mm
Coolant/pressure Emulsion/70 bar MQL Deep hole oil/110 bar Deep hole oil/140 bar
The drill tube and tip are made entirely of solid carbide with a kidney shaped coolant channel. Coolant and chips are flushed out of
the drilled hole via the V-shaped groove, or flute, on the drill shank.With standard tool designs, the V-shaped ute extends to the driver (pin). Solid carbide gundrills are available with a drill shank length up to 100 x diameter.
Design of drill headand shank
Solid carbide design
Working method /tool type
Solid drilling tools Counterboring tools
Type 113 Type 113-HP Type 113-01 Type 113-02
Illustration
Drilling range from - to (mm) Ø = 0.500 - 12.000 mm Ø = 0.700 - 12.000 mm Ø = 1.500 - ... mm Ø = 0.500 - 12.000 mm
Tool length Available up to 100 x diameter
Coolant hole design Kidney-shaped coolant channel
Advantages
- Deep holes with extremely small diameters can be drilled
- Solid carbide design allows greater rigidity reducing vibration and tensional flex during drilling
- Higher feedrates are possible/greater penetration feed rates
- Various peripheral contours for greater application flexibility
- Even higher cutting speeds are possible compared to the gundrill with brazed carbide tip (Type 110)
- Regrindable
- Optimum coolant flow due to kidney shaped coolant channel
- Minimized drift by higher tool rigidity
Peripheral contours
botek adapts thecontour optimally
to meet yourdrilling requirements!
- All materials
- Suitable for most drilling requirements
- Close hole tolerance
- Minimum drift
- Steel, stainless steel
- Not easily machinable materials
- Preferred for water soluble (emulsion) coolant
Important:Contour EA and Gare non-micable! - Cast iron, malleable materials
- Crosshole drilling- Angular entrance and exit bores
- Aluminium, Copper
- close hole tolerance
Special contour Also available upon special request
Special nose grinds All tools are also available with special nose grind
Tool coatings Please specify the coating you require
botek solid carbide gundrills are made complete with drivers. Drivers transmit the torque from the machine to the drill.High rotational accuracy between the drill shank and the driver avoids additional vibration, thereby increasing the cuttingperformance and process reliability of the tools. In addition to a large number of standard drivers, botek manufacturesdrivers also to customer specifications.
Cylindrical drivers (DIN 6535 HA) used in hydraulic chucks or sealed collets achieve best true running, typical onmachining centres.
Standard drivers for solid carbide gundrills – Overview
Type 115-04Single flute counterboring toolwith guiding pilot steel body
with inserted carbidecutting blade and bearing pads
tool dia. 12.001 - 60.006 mm
Tool design
The typical gundrill is fabricated with a drill head section of solid carbide or a steel body with inserted carbide cutting blade andbearing pads. The head section is brazed to a heat treated tube (flute) section then fitted and brazed to a hardened and ground steeldriver.
The single flute gundrill is selfguided while drilling. Guide pads on the drill head act as supports. The layout of the guide pads oftenhas a decisive influence on the surface quality and dimensional accuracy of the drilled hole. Cutting forces press the guide padsagainst the hole wall with force that a burnishing effect occurs, producing the surface quality and dimensional accuracy (roundness)typical of the gundrilling process.
Various contours (see page 12 +13) are available to suit your drilling requirements.
b) Nose grind geometry
The nose grind geometry affect the following, hole tolerance, chip formation, coolant pressure and flow, tool life, centerline deviationand surface quality. Over the years, botek has successfully tested a number of different nose grinds for drilling various materials.
botek‘s experience has formed the foundation for the development of our standard nose grind geometries. This meets the requirementsof most drilling applications. Deep-hole drilling of especially long chipping materials and difficult to machine materials usually call forspecial nose grind geometries, and in some cases, made to order chip breakers, all available from botek.
Standard nose grinds for Type 110 / 111
Nose grind no. 001 (SA-0001)for drill range 1.850 - 4.000 mm
Nose grind no. 002 (SA-0002)for drill range 4.001 - 20.000 mm
Nose grind no. 003 (SA-0003)for drill range 20.001 - ... mm
We are pleased to provide you with regrinding instructions on request.
Single flute gundrills with brazed drill headType 110 / Type 111
- with round drill tube (chip removal in drilling direction)
- with fluted standard drill tube (chip removal against drilling direction)
Peripheralcontours
botek adapts thecontour optimally tomeet your drilling
requirements!
Important:Contour EA,G and E are
non-micable!
Fixed peripheral contourdue to tool design
Fixed peripheral contourdue to tool design
Specialcontour
Also available upon special request - -
Specialnose grinds
All tools are also available with special nose grind-
-
Tool coatings Please specify the coating you require - -
Diamant /PCD Also available to order with PCD point - -
2. Drill shaft
Tempered alloy steel tubing is formed with a V-shaped groove (flute) to create the swarf (coolant) return channel required for the
gundrilling operation. Design considerations for proper drill tube sizes include the ratio between the drill tube outside diameter andinside diameter for optimum torsional rigidity. This ensures exceptional cutting performance, coolant flow and tool life.
With standard gundrills the ute section is typically extended to the driver. For longer gundrills it is possible to have a round section of drill tube with a shorter flute length for added rigidity and strength.
Single flute gundrills with brazed drill headType 114 / Type 115
Counterboring / Trepanning tools
- Steel- Close drilling tolerance- Good surface quality- Ideal for short holes
- Steel and aluminium- Crosshole drilling operations- Unfavourable drilling
conditions
- Steel, cast iron- Soft materials
- Cast iron and graphite- Close drilling tolerance in cast iron
- Aluminium- Close drilling tolerance
- Stainless steel, wood- Not easily machinable materials- Preferred for water soluble (emulsion) coolants
(Standard)
- All materials- Suitable for nearly all drilling requirements- Close drilling tolerance- Minimal drift
The single flute gundrill is typically provided with a driver for holding the tool in the machine spindle. The driver transmits the torquefrom the machine spindle. botek manufactures a variety of standard drivers from stock as well as customer specific configurations.
Driver
Type 110 / Type 111 / Type 112 / Type 114 / Type 115
Standard drivers for single flute gundrills with brazed drill head - Overview
To achieve optimum drilling results when using carbide tipped or solid carbide gundrills, various criteria must be applied. In
addition to tool design, key factors are machine design and construction, process techniques, pressurized and filtered deephole drilling coolant. Selection of proper cutting parameters is also a significant factor.
The key factors botek considers when designing gundrills:
- Material type
- Diameter, tolerance and surface finish
- Peripheral contour
- Carbide grade and coating
- Nose grind geometry
In addition to our refined manufacturing and technology for consistent product quality, our application and technicalexperience help you realize optimal solutions.
Non ferrous metals
M a t e r i a l
Aluminium alloys (depending on Si-content)
Tool steel
Cast iron (Grey + Nodular)
Heat treatable steel
Nitriding steel
Free machining steel
Case-hardening steel
Drilling quality area
Surface quality
Roughness class N8 N7 N6 N5 N4 N3
Quality area
Surface roughnessvalues
Rt µm 21 11.5 6.2 3.4 1.9 1.0
Ra µm 3.2 1.6 0.8 0.4 0.2 0.1
Rz µm 14 7.6 4.5 2.2 1.2 0.65
under normal conditions
under favourable conditions
Achievable drilling tolerances
IT 13 12 11 10 9 8 7 6 5under normal conditionsunder favourable conditions
Counter-rotation: The optimum results are achieved with rotating tool and simultaneous workpiece counter-rotation: See ”Z”
Workpiece rotating: The next best technique involves the workpiece rotating with the gundrill non-rotating: See ”Y” Tool rotating: See ”X”
In all applications tool drift is minimized by using a close fitting pilot bore or guide bushing during gundrilling.Angular alignment of pilot bore with desired gundrill bore is imperativ.
With a guide bushing, alignment and distance from the workpiece are also important.
Roundness
Hole roundness is a primary advantage of gundrilling over conventional twist drilling.Hole roundness measurements as low as 3 µm are possible.
The data above is based on single flute carbide tipped gundrills. Achieved results may be improved usingsingle flute solid carbide gundrills.
Hole straightness
Whipping or deection of the gundrill ute plays a decisive role in hole straightness and run out in the workpiece. Carbide tipped gundrills must be supported by a steady rest or whip guide every 40 diameters.For further information, refer to page 24 and 25.
Cutting speed and feed rate are dependent on tool length, coolant type and material being drilled,as well as the stability of the drilling machine and workpiece clamping. All figures specified are guide values.
Guide values for gundrilling of various materials with solid carbide gundrills(Guide values Type 113-HP refer to page 20 and 21)
10
30
50
70
90
110
130
150
170
190
210
Einlippenbohrer in Vollhartmetall-AusführungKühlschmierstoffdruck p (für Tiefbohröl)- unter Berücksichtigung der Bohrtiefe
suitable at limited degree suitable at limited degree
Cutting speed and feed rate are dependent on tool length, coolant type and material being drilled,as well as the stability of drilling machine and workpiece clambing. All figures specified are guide values.
Technical Information
Guide values Type 113
The required viscosity of the deep-hole drilling oil for a drill diameter of 0.5 to 1.5 mm is approx. 8 - 10 mm2/s (50 SUS) at40°C and 10 - 15 mm2/s (60 SUS) at drill diameters > 1.5 mm.
When using emulsion, the specied pressures (p) may be reduced by 10 - 20 %.
Coolant filtration of 5 to 10 microns, or better, is required for drill diameters < 2.0 mm.Coolant filtration of 5 to 20 microns, or better, is required for drill diameters ≥ 2.0 mm.
Guide values for minimum coolant quantity / volumetric flow rate “Q“ at specified pressure “p“ (bar):
Reliable chip removal is only assured if sufficient coolant is supplied to the tool cutting tip. The diagram on page 18 shows ourrecommendation with regards to coolant pressure as a function of drill diameter and drilling depth.
Flow capacity of coolant pump: drill dia. (mm) ≤ 2.0 min. 4 l/minFlow capacity of coolant pump: drill dia. (mm) 2.0 - 12.0 min. 24 l/min
Guide values for gundrilling of various materials with solid carbide gundrills
Cutting speed and feed rate are dependent on tool length, coolant type and material being drilled,
as well as the stability of drilling machine and workpiece clambing. All figures specified are guide values.
The required viscosity of the deep-hole drilling oil for a drill diameter of 0.5 to 1.5 mm is approx. 8 - 10 mm2/s (50 SUS) at40°C and 10 - 15 mm2/s (60 SUS) at drill diameters > 1.5 mm.
When using emulsion, the specied pressures (p) may be reduced by 10 - 20 %.
Coolant filtration of 5 to 10 microns, or better, is required for drill diameters < 2.0 mm.Coolant filtration of 5 to 20 microns, or better, is required for drill diameters ≥ 2.0 mm.
Guide values for minimum coolant quantity / volumetric flow rate “Q“ at specified pressure “p“ (bar):
Reliable chip removal is only assured if sufficient coolant is supplied to the tool cutting tip. The diagram on page 20 shows ourrecommendation with regards to coolant pressure as a function of drill diameter and drilling depth.
Guide values for gundrilling of various materials with carbide tipped gundrill Type 113
Technical InformationGuide values Type 113-HP
Flow capacity of coolant pump: drill dia. (mm) ≤ 2.0 min. 4 l/minFlow capacity of coolant pump: drill dia. (mm) 2.0 - 12.0 min. 24 l/min
Technical InformationGuide values Type 110 / Type 111
Reliable chip removal is only assured if sufficient coolant is supplied to the tool. The diagrams show our recommendation for coolantpressure and quantity by drill diameter and drilling depth.
Guide values for gundrilling of various materials with carbide tipped gundrill
1. Before using the drills make sure the machine has the necessary equipment to do proper deep hole drilling.The machine should have suitable safety guarding for protection from cutting chips and coolant for operator. Check with machine builder!
2. Improper use or handling of deep hole drilling tools can cause serious injuries, e.g. skin cuts from the cutting edge.
3. Deep hole drilling tools are not self centering and can be unbalanced. Therefore the drills must be guided during the start of the drilling cycle by means of a sufciently long drill bush or pilot hole (see detail ”Z” on below illustration). For information on the guide hole (pilot hole) see page 5.
4. The gundrill is fed into drill bush or pilot hole while non rotating or rotated slowly at < 50 RPM. Then the coolant and themachine spindle should get started.
5. After reaching the drilling depth switch off the coolant and retract with the spindle stopped or slowly rotatedat < 50 RPM.
6. Tool support: unsupported drill length should never exceed the dimensions as shown on table (6a). If the unsupported drilllength is exceeded the drill might cause injury.Do not exceed 40 times diameter unsupported (Type 110)!
6a. Guide values for tool support of botek deep hole drilling tools (gundrills):
Technical InformationApplication notes for botek deep hole drilling tools (single flute gundrills)
L
Guide hole
max. unsupported length(see item 6 below)
Maximum unsupported drill
length (L) between the steady
rests or in a guide hole
Single flute gundrills:
Type 110with brazed drill head
Type 113 / Type 113-HPsolid carbide gundrill
Example 1: Type 110: drill diameter D = 2.0 mm, unsupported drill length up to maximum 80 mm = 40 x DExample 2: Type 110: drill diameter D = 2.0 mm x 200 mm OAL, 1st support at 80 mm and 2nd support at 160 mm
40xD
30xD
20xD
10xD
0
1.85 3 6 9 12 15 18 21 30 35 40 45 50 55
Drill diameter – Length ratio* for Type 110
Drill dia. (mm)
For applications with a pilot hole please referto the recommendations on page 5 „dimensionsfor the guide hole“.* Length ratio max. unsupported length (see point 3).
Technical InformationApplication notes for botek deep hole drilling tools (single flute gundrills)
7. Grinding of carbide produces dust (cobalt, etc.) that may be potentially hazardous. Use adequate ventilationand safety glasses during grinding.
8. Consequences of not following our application notes No. 1 - 7
Using botek gundrills other than directed may cause personal injury.Tool breakage and unsupported gundrills can be extremely dangerous.
Please use with caution and care.
Please note that all application notes and values contained herein are intended as guidelines only. We do notaccept any liability for damages caused by improper handling of botek deep hole drilling tools, operating errors,unsuitable machinery or misuse while using our tools!
Do you have any further queries? Please call up at P +49 7123 38 08-0. We will be pleased to offer you advice.
Drill diameter – Length ratio* for Type 113 / Type 113-HP
100xD
75xD
50xD
25xD
0
0 1 2 3 4 5 6 7 8 9 10 11 12
Drill dia. (mm)
The area marked red indicates a critical zone, wherefeed rate (max. 25% of value given in catalogue) andespecially rotational speed (50%) must be reduced.
That means: A tool with a dia. 1.6 mm can only beincreased to the value given in the catalogue oncethe unsupported length is shorter as 70 x Dia.From dia. 7.0 mm onwards the length – diameterratio is within acceptable limits.For applications with a pilot hole please refer tothe recommendations on page 5 „dimensions forthe guide hole“.* Length ratio max. unsupported length (see point 3).
Gundrills must be reground with great care using a diamond grinding wheel. Drills with a diameter greater than 10 mm,in particular drills with inserted carbide cutting blade and guide pads should be wet ground when possible.
botek provides a customized regrinding service, and will be pleased to carry out this work for you.
We also supply special grinding machines and accessories which enable you to regrind single ute gundrills easily and quickly at your facility.
botek twin grinding wheels for pre- and finish-grinding have a proven record of performance.These grinding wheels allow our customers to economically regrind our gundrills.
Various grinding wheels are available from stock.
It is important that the carbide tip does not become overheated during grinding.Overheated carbide can cause thermal cracking and premature tool life.
Under no circumstances should the ground surface show any signs of discoloration.
k Coating botek has its own coating facility. Depending on the processed material, coolant and drilling conditions,
we offer the matching coating to suit your application.
k Regrinding we offer a prompt and cost effective in house regrinding service.
k Processlayout
k Test department
Please contact us.Further information on www.botek.de
The following methods are available:
1. Measurement of the machine pump performance:
By means of a tool dummy a tool-independentcheck can be carried out – a big advantage.
2. Measurement with the tool:
The tool dummy is replaced by the actual drill.The pressure can be checked directly at the tool.
Quite often the set value at the pressure gauge is notreflecting the value that actually reaches the tool.
Numerous sources for errors such as leaking valve parts, faulty
rotating connectors or snapped hose lines are not visible on firstsight. Leading to a decreased coolant pressure, this could influencethe drilling result negatively.
The gauging-kit developed by botekmeasures the real pressure –directly at the spindle/tool(up to a max. of 160 bar).Taken measurements consider different coolant channel s
Coolant pressure gauging-kit for machining centres and deep hole drilling machines
specialized in manufacturing certain tools quickly.
With the „botek EXPRESS PRODUCTION LINE“ we can manufacture tools, which are not includedin our stock program, in a very short time.
Product range:- Single flute gundrills/twin fluted drills with brazed carbide tip Type 110/Type 120- Single flute gundrills in solid carbide design Type 113- Single flute gundrill with indexable inserts and guide pads Type 01
You can order by fax: +49 7123 38 08-138
Stock program:- Worldwide first stock program for gundrills with indexable inserts and guide pads Type 01- Single flute gundrills Type 110 with brazed carbide tip – extended size range
More information regarding the Express order line and ourstock program please see our new homepage, www.botek.de
• Process layout/process optimization: Deep and precise drilling with high process
reliability – we support you.
• Test department: We recreate your
application and develop tailored tooling
solutions that perfectly match your
process conditions.
Special tools
Step and form boring toolswith indexable inserts.
PCD tipped single flute/twinflute gundrills andform boring tools arealso available.
Axial-PulsatorThe botek Axial-Pulsator hasb een developed tomaximize the feed rate ofstraight fluted deephole drilling toolswhen drilling steel and longchipping materials.
botek’s Axial-Pulsator achievesequal hole makingquality (straightness,run out, concentricity and surfacefinish)a sstan dard deep hole drilling tools witheconomic performance.
Coolant pressure gauging-kitCoolant pressure gauging-kit for machining centreson deep hole drilling machines.
Drill HeadSettingGauge
Process reliable diameter setting ofdrill heads.
Axial-Pulsator Coolant pressure gauging-kit Drill Head Setting Gauge
Type 158-01Solidcarbide twistdrill 2 margins/coolant fed(available on request)
diameter range3.000 -14.000 mm
Type 158-00Solidcarbide twist drill(high performance twist drill)4 margins/coolant fed
diameter range:3.000 -14.000 mm
TypeB200Solidcarbide drillDIN18973-fluted
30˚helix140˚drill point
Ø 3.000-20.000 mm
Type 1404cuttingedgecounterboring toolwith solid carbide tip
diameter range:6.000-40.000 mm
Type 1606cuttingedgescounterboring toolwith solid carbide tip
diameter range:6.000-40.000 mm
TypeB300Tapsize endmillsolid carbideDIN8378
3-fluted30˚helix90˚coun tersink
Ø 2.500-10.200 mm
TypeF005-01Insertpocketendmillsolid carbide
3-fluted
Ø 1.800-25.000 mm
TypeF244…F251Ball nose endmillsolid carbideDIN6527
+botek standard2-fluted
Ø 3.000-20.000 mm(25.000
mm)
TypeF341…F347Ball nose endmillsolid carbideDIN6527
+botek standard3-fluted30˚helix
Ø 3.000-20.000 mm
TypeF440…F445Ball nose endmillsolid carbideDIN6527
+botek standard4-fluted
Ø 3.000-20.000 mm(25.000
mm)
Non standards alsoavailable.Please contactyourbotek representative.
Special tools on request.
MS 01Bench topgr indingmachinesuitable for oursharpening
fixtures.
MS 12-2Multi-station grinding machinefor highly efficient grinding oflargebatchesof toolswith the samepointgeometry.The machineissu itable for
tool diametersfrom1.850 mm to12.000 mmand tool lengthsup toapprox. 1000 mm.
Additionalaccessories(grindingwheels, tool
holders etc.)are alsoavailable.
Type ZSSharpeningfixturesingle flute gundrills canbe reground on any goodtool grinding machine.
drill-range:Ø 2.000-50.000 mm
MS 12-3Multi-station grindingmach inefor highly efficient grinding oflargebatchesof toolswith the samepointgeometry.Themachineis suitable for
tool diametersfrom1.850 mm to12.000 mmand tool lengthsup toapprox. 1000 mm.
Regrinding (single flute gundrills)
Type PSSharpeningfixturesingle flute gundrills canbe reground on any goodtool grinding machine.
• Our General Standard Terms and Conditions,which we assume as known, apply.
• We reserve the right to make modificationsin the interests of technical improvement.Such modifications cannot, in principle,be accepted as justifiable grounds for complaint.
• Subject to change. The manufacturer acceptsno responsibility for misprints and other errors.
Type 48Trepanninghead4-start connection thread externaldrilling range: 55.00 - 197.99 mmflange mounting drilling range:198.00 - 412.99 mm
1-start connection thread internal
4-start connection thread external
without add.fibre guide padsforboring depth up to30 xdia. w it h a dd . fi br e g ui de p ad s fo r b or in g d ep th u p t o 10 0 x d i a. w it ho ut a dd . fi br e g ui de p ad s fo r b or in g d ep th u p t o 30 x d i a.
Type 120Twin fluted drillswith solid carbidehead
diameter range:6.000-26.500 mm
Type 123-01Solidcarbide 2-fluted drillfor taps,coolant fed,step angle 90°
diameter range:2.800-32.000 mm
Type 123-02Solidcarbide 2-flutedstepdrillfor taps,coolant fed,step angle 180°
diameter range:2.800- 32.000 mm
Type 125Twin fluted counterboring toolwith solid carbide head
diameter range:4.000-40.000 mm
Type 123Solidcarbide2-fluteddrillcoolant fed doublemargin
diameter range:2.800-32.000 mm
Type 122Twin fluted steppedsoliddrillingtoolwith solid carbide head
diameter range:4.510- 26.500 mm
Type 125-03Twin fluted counterboring toolwith guidingpilot
with solid carbide tip and steel shank
diameter range:6.000- 40.000 mm
Type120/123 also availablecuttingedgewith PCD
Si ngl e f lu te a nd t wi n f lute d gu ndr il ls are hi ghl y su ita bl e f or dr il li ng on m ode rn C NC ma chi ni ng ce nt re s. T ool sf or dri ll ing sy ste mB TA a re not re com me nd ed f or u se on ma chi ni ng ce nt re s.
Type 43B/A/FSoliddrill headwith indexable inserts andguide pads,setting of dril l
diameter by stop plate
drillingrange:60.00-350.00mm
Type 35ECounterboringhead4-start connection thread
external, large adjustmentrange
drillingrange:61.00-198.99mm
Twin fluted drills System BTA System Ejector
Toolsfor drilling systemEjector are highly suitable for drilling on modern CNCmachining centres.
Drill tubedrivers(split style)
Pressure heads(BOZA)for rotating and non-rotating
workpieceswith clamping conesor face sealing
Vibration dampersDrill tubedrivers(collet style)
Type 08Trepanningtooldiameter range 25.000-100.000
Type 09Core Cutterdiameter range 30.000-70.000
Type 113-HP-MSolidcarbide gundrillNew:High performancetool design for the usagewith MQL
diameter range:2.000-12.000 mm
Type 153-02Solidcarbide pilotdrill
not coolant fed/point angle 140°
3 xD (drill flute length)
diameter range:1.000- 26.000 mm
Type 158-07Solidcarbide pilotdrill
not coolant fed/point angle 160°3 xD (drill flute length)
• Our General Standard Terms and Conditions, which we assume as known, apply.
• We reserve the right to make modifications in the interests of technical improvement.Such modifications cannot, in principle, be accepted as justifiable grounds for complaint.
• Subject to change. The manufacturer accepts no responsibility for misprints and other errors.
Motorway intersectionStuttgart « A8 from MunichA8 from Karlsruhe »
Herrenberg
A 8 1 f r o m S
i n g e n »
B27 to Tübingen
TübingenReutlingen
Stgt.Degerloch ✈
B312
Metzingen
Deep hole dril l ing onmachining centres
1. Before using the drills make sure the machine has the necessary equipment to do proper deep hole drilling.The machine should have suitable safety guarding for protection from cutting chips and coolant for operator.Check with machine builder!
2. Improper use or handling of deep hole drilling tools can cause serious injuries, e. g. skin cuts from the cutting edge.
3. Deep hole drilling tools are not self centering and can be unbalanced.Therefore the drills must be guided duringthe start of the drilling cycle by means of a sufficiently long drill bush or pilot hole.
4. Tools support:unsupp orted drill length should never exceed the dimensions as shown on table (previous page).If the unsupported drill length is exceeded the drill might cause injury.Do not exceed 40 times diameter unsupported!
5. The gundrill is fed into drill bush or pilot hole while non rotating or rotated slowly at < 50 RPM.Then the coolant and the machine spindle should be started.
6. After reaching the drilling depth switch off the coolant and retract with the spindle stopped or slowly rotatedat < 50 RPM
7. Grinding of carbide produces dust (cobalt,etc.) that may be potentially hazardous.Use adequate ventilation andsafety glasses during grinding.
8. Consequences of not following our application notes No.1 – 7
Ple ase n ote that a ll applica tion notes and values contained herein are i nte nde d a s guidelines only.We d o n ot a ccept any liabi lit y f or d ama ges c aused by impro per handling o f b otek deep hole drillingtoo ls ,operati ons erro rs ,unsuit ab le machinery or misuse w hi le using our tools!
Do you have any further queries? Please call up at +49-(0)-7123-3808-0.We will be pleased to offer you advice.
Gui de values:
The values specified in this catalogue are guide values only and can vary depending on your application.
L
pilothole
Using botek gundrills other than directed may cause personalinjury.Tool breakage and unsupported gundrills can be extremelydangerous. Please use with caution and care.
Saf et y informatio n:
• Our General Standard Terms and Conditions,which we assume as known, apply.
• We reserve the right to make modifications in the interests of technical improvement.
Such modifications cannot,in principle, be accepted as justifiable grounds for complaint.
• Subject to change.The manufacturer accepts no responsibility for misprints and other errors.
6. Easy exchange of indexable inserts and guide pads.No need to adjust setting within ± 0.01 mm diameter.
7. When using matching interchangeable parts, the drillhead diameter may, however, be adjusted within a rangeof 0.5 mm.
8. The model with extended guide pads (Type 01-010) isalso suitable for crosshole drilling.
9. Drilling grades up to IT 8 are possible.
10. Retipping is possible.
Advantages / Overview
Type 01
Type Drilling range
Type 01-001
Gundrill for solid drilling
Standard version with 2 guide pads
Drilling range: Ø 12.00 - 17.99 mm
Type 01-000
Gundrill for solid drillingStandard version with 2 guide pads
Drilling range: Ø 18.00 - 43.99 mm
Type 01-011
Gundrill for solid drilling
Version with extended guide pads(4 or 5 pcs respectively)
Drilling range: Ø 13.50 - 17.99 mm
Type 01-010Gundrill for solid drilling
Version with extended guide pads(4 or 5 pcs respectively)
Drilling range: Ø 18.00 - 43.99 mm
Type 01-020Gundrill for solid drilling
Milled shank with 2 guide padsDrilling range: Ø 18.00 - 43.99 mm
Standard length: 5 x D and 10 x D
Overview
Chip breaker
1. The chip breaker has a decisive part to play with the chipformation.
2. To obtain trouble-free chip flow along with optimum toollife, it is essential to aim for the most ideal chip formationpossible.
3. The chips should be broken just short enough to ensure thatthere is no chip congestion in the flute of the drill.
4. Excessively short, crushed chips place strain on the cuttingedges and lead to premature wear and will destroy thecutting edge.
5. For processing commonly used materials, indexable inserts areavailable from stock with chip breakers in accordance withmodel SP 1 or model SP 2.
Chip breaker SP 1
- Unalloyed steelsC > 0.2 %
- Alloyed steels
- Toughened steels
- Case hardened steels
- Tool steels
- Stainless andacid-proof steels
Chip breaker SP 2 (from Ø 18.00)
- Unalloyed steelsC < 0.2 %
- Long chip-forming special steels
- Stainless and acid-proof steels
Chip breaker SP 3
- According to b, t, r or drawing
Advantages
1. New, high-performance deep hole drilling tool with a modern,user-friendly design.
2. Very high operational efficiency combined with optimumcutting capacity.
3. Ideally suited to CNC machines with a coolant system. Drillingdepths up to 40 x D are possible in a single drilling cycle. Toolsalso produce excellent results when used on deep hole drillingmachines.
4. No regrinding needed.
5. Various indexable insert chip breakers are available accordingto material to be processed. Coated indexable inserts and
These values are guide values for toughenedsteel rated ~ 800 N/mm² and may deviatedepending on workpiece material andcharacteristics, as well as tool condition.
Coolant information
Proper chip removal is only assured if the
coolant is supplied to the tool in sufficientquantity and under sufficient pressure.
Material /Mechanical strength
properties
Cuttingspeed(m/min)
Feed (mm/rev) for drill diameter (mm) Carbide grades
Guide values for deep hole drilling of different materials:
Guide values for cutting speed and feed rate are shown in the table below.As there are many factors that can affect the results of deep-hole drilling, these values must be adjusted if necessary.
Guide values for deep hole drilling of different materials:
Guide values for cutting speed and feed rate are shown in the table below.As there are many factors that can affect the results of deep-hole drilling, these values must be adjusted if necessary.
80
32
25
20
16
12.5
10
8
635040
f = 0. 2 5 ( m m / U )
f = 0. 2 ( m m / U
)
f = 0. 1 6 ( m m / U )
f = 0. 1 2 ( m m/ U )
S p i n d l e p o w e r [ k W ]
32
25
20
16
12.5
10
8
40 50 63 80
f = 0. 2 5 ( m m
/ U )
f = 0. 2 ( m m / U
)
f = 0. 1 6 ( m m / U )
f = 0. 1 2 ( m m/ U )
Drill diameter (mm) Drill diameter (mm)
F e e d f o r c e [ k N ]
.
.
.
250
160
100
63
40 50 63 80 40 50 63 80 C o o l a n t q u a n t i t y [ l / m i n
These guide values are for drilling alloyed steel(800 - 1,000 N/mm2) and can vary for otherworkpice materials and tool conditions (wear).
Coolant information
Sufficient coolant must be supplied to the tool
for troublefree chip removal.
Guide values for deep hole drilling of different materials:
Guide values for cutting speed and feed rate are shown in the table below.As there are many factors that can affect the results of deep-hole drilling, these values must be adjusted if necessary.
Technical information
Type 07
Drill diameter (mm) Drill diameter (mm)
Drill diameter (mm) Drill diameter (mm)
C o o l a n t p r e s s u r e [ b a r ]
C o o l a n t f l o w
[ l / m i n ]
F e e d f o r c e [ k N ]
S p i n d l e p o w e r [ k W ]
3 0 x d
25
20
16
12.5
10
8
6.3
5
25 28 32 36 40 45 50 25 28 32 36 40 45 50
25 28 32 36 40 45 50 25 28 32 36 40 45 50
50
63
80
100
125
160
200
40
32
25
20
16
12.5
10
8
25
20
16
12.5
10
8
1 0 x d
3 0 x d
1 0 x d
f = 0. 4 ( m m / U )
f = 0. 3 2 ( m m
/ U )
f = 0. 2 5 ( m m
/ U )
f = 0. 2 ( m m
/ U )
f = 0. 4 ( m m
/ U )
f = 0. 3 2 ( m m
/ U )
f = 0. 2 5 ( m m
/ U )
f = 0. 1 6 ( m m
/ U ) f = 0. 2
( m m / U )
f = 0. 1 6 ( m m
/ U )
Material /Hardness
Cutting speed(m/min)
Feed (mm/rev) for drill diameter (mm) Carbide grades
Technical appendixRequirements for application / Dimensions for the guide hole
The characteristic of the single flute gundrilling process is that coolant is fed through the coolant hole in the tool and exits along
with the chips in the V-shaped groove (flute) on the drill tube from the drilled hole. The coolant also provides lubrication to the drillperiphery.
The gundrill is a single-edged tool without self-centering. When positioning the drill, the tool must be guided through a drill bush ora pilot hole.
The quality of the guide hole affects the drilling performance.
1. An efficient coolant and filtration system with a coolant filtration of 20 µm to 30 µm (the smaller the drill diameter, the betterthe coolant and filtration system should be).
2. Suitable coolant, i.e. deep hole drilling oil or emulsion (min. 10-12% concentration, with additives) has to be provided insufficient quantity and pressure. Minimum quantity lubrication (MQL) may be used under certain conditions.
3. Guidance with a drill bush (deep hole drilling machine) or a pilot hole (machining centre).
Dimensions for the guide hole
Drill diameter (mm)
Dimensions for guide hole (pilot hole/drill bush)
L(mm)
D (mm)to tool-Ø
6 0 º
L
F
Ø D
12.00 - 17.99 approx. 1.50 x D + 0.016 to 0.034
18.00 - 29.99 approx. 1.50 x D + 0.020 to 0.041
30.00 - 49.99 approx. 1.25 x D + 0.025 to 0.050
50.00 - ... approx. 1.00 x D + 0.030 to 0.060
mit Bohrbuchsewith drill bush
mit Pilotbohrung
The dimensions specified in the table are guide values and comply with ISO tolerance field F7. ISO tolerance F8 is possible underspecific conditions. To avoid chipping of the cutting edge, a chamfered pilot hole (F) is recommended depending on machiningrequirements.
In application with deep hole drilling machine we recommend to use drill bush with F7 hole tolerance.
To achieve optimum drilling results when using deep hole drilling tools with indexable inserts and guide pads, various criteria
must be applied. In addition to tool design, key factors are machine design and construction, process techniques, pressurised andfiltered deep hole drilling coolant. Selection of proper cutting parameters is also a significant factor.
The key factors botek considers when designing gundrills:
1. Before using the drills make sure the machine has the necessary equipment to do proper deep hole drilling.
The machine should have suitable safety guarding for protection from cutting chips and coolant for operator. Check with machine builder!
2. Improper use or handling of deep hole drilling tools can cause serious injuries, e.g. skin cuts from the cutting edge.
3. Deep hole drilling tools are not self centering and can be unbalanced. Therefore the drills must be guided during the start ofthe drilling cycle by means of a sufficiently long drill bush or pilot hole (see detail „Z“ on below illustration). For informationon the guide hole (pilot hole) see page 15.
4. Tool support: Unsupported drill length should never exceed the dimensions as shown on table. If the unsupported drilllength is exceeded the drill might cause injury.
5. The gundrill is fed into the drill bush or pilot hole while non rotating or rotated slowly at < 50 RPM. Then the coolant and themachine spindle should be started.
6. After reaching the drilling depth switch off the coolant and retract with the spindle stopped or slowly rotating at < 50 RPM.
7. Grinding of carbide produces dust (cobalt, etc.) that may be potentially hazardous. Use adequate ventilation and safety glassesduring grinding.
8. Consequences of not following our application notes No. 1 - 7.
Please note that all application notes and values contained herein are intended as guidelines only. We do notaccept any liability for damages caused by improper handling of botek deep hole drilling tools, operating errors,unsuitable machinery or misuse while using our tools!
Do you have any further queries? Please call up at +49 7123 38 08-0. We will be pleased to offer you advice.
.
il
Taumelschlag
Bruchstelle
TypeMax. unsupported length of the tool
Drill diameter D Max. unsupported length L
Type 01 / Typ 07
12.00 - 20.9921.00 - 30.9931.00 - 40.99
41.00 - ... .....
approx. 40 x Dapprox. 35 x Dapprox. 30 x D
approx. 25 x D
Type 0237.00 - 44.9945.00 - 59.9960.00 - 74.99
approx. 40 x Dapprox. 30 x Dapprox. 25 x D
Using botek gundrills other than directed may cause personalinjury.
Tool breakage and unsupported gundrills can be extremelydangerous. Please use with caution and care!
specialized in manufacturing certain tools quickly.
We have established an Express production line which specializes in manufacturing certain tools quickly.
Product range:- Single flute gundrills/twin fluted drills with brazed carbide tip Type 110/ Type 120- Single flute gundrills in solid carbide design Type 113- Single flute gundrill with indexable inserts and guide pads Type 01
You can order by fax or e-Mail straightforward and quickly.We are pleased to send you our order form.
Contact person:
Mr. Andreas LehmannP +49 7123 38 08-394F +49 7123 38 08-138E-Mail [email protected]
Stock program:- Worldwide first stock program for gundrills with indexable inserts and guide pads Type 01- Single flute gundrills Type 110 with brazed carbide tip – extended size range
More information regarding the Express order line and our stock programplease see our new homepage, www.botek.de.
Coolant pressure gauging-kit for machiningcentres and deep hole drilling machines
The following methods are available:1. Measurement of the machine pump performance:By means of a tool dummy a tool-independent check can becarried out – a big advantage.
2. Measurement with the tool:The tool dummy is replaced by the actual drill.
The pressure can be checked directly at the tool.
For machining centres:
Spindle adaptor for collet chuck ER-32 with cylindrical shaft
Ø 20.0 (h5) mm, incl. nut for sealing disc assembly
Quite often the set value at the pressure gauge is not reflecting the value that actually reaches the tool.Numerous sources for errors such as leaking valve parts, faulty rotating connectors or snapped hose linesare not visible on first sight. Leading to a decreased coolant pressure, this could influence the drillingresult negatively.
The gauging-kit developed by botek measures the real pressure –directly at the spindle/tool (up to a max. of 160 bar).Taken measurements consider different coolant channel sizes.
12. Higher feed rate possible.13. Best drilling quality.
14. High process reliability.
15. Tool lengths up to 1,200 mm – depending on tool type and tool diameter.
16. Suitable for use on machining centres and turning machines with high pressure coolant system.
17. Minimum quantity lubrication (MQL) possible under certain conditions.
18. Drills can be used horizontally or vertically with either tool, workpiece or counterrotation.
19. Tools can be reground – at botek or in your facility.
10. Ideally suited to drill short chipping materials like Alu-alloys and cast iron.
11. Nose grinds with chip breaker for optimum chip formation available.12. With the botek „Axial-Pulsator“ drill Type 120 and 123 are also suitable drilling steel and other long chipping materials.
13. With the „Axial-Pulsator“ higher feed rates can be achieved.
The botek „Axial-Pulsator“ has been developed to increase the feed rate of straight uted deep hole drilling tools, particulary drilling steel and other long chipping materials.
For additional information please refer to page 16.
The characteristic of the 2-ute drilling process is that coolant is fed through the coolant holes in the tool and exits along with the
chips in the flutes from the drilled hole. The coolant also provides lubrication to the drill periphery. Conditions for successful deep hole drilling
1 An efficient coolant and filtration system with a filtration of 20 µm to 30 µm (the smaller the diameter, the better the coolantand filtration should be).
2. Suitable coolant, i. e. deep hole drilling oil or emulsion (min. 10-12 % concentration, with e. p. additives) has to be provided insufficient quantity and pressure. Minimum quantity lubrication (MQL) may be used under certain conditions.
3. Drill guiding through drill bush or pilot hole in the workpiece.
The 2-ute gundrill is not self centering. When positioning the drill, the tool must be guided through a drill bush or a pilot hole. The quality of the guide hole affects the drilling performance (tool life, centreline deviation, etc.).
Dimensions for the guide hole
For precise holes we recommend to use the ISO tolerance G6. The dimensions specified in the table are guide values.To avoid chipping to the cutting edge, a chamfered pilot hole (F) is recommended depending on the machining requirements.Please refer to application notes on page 18.
The gundrilling process
and the requirements for application
Drill bush
Pilot hole
L
Drill diameter (mm) Dimensions for guide hole (pilot hole)L (mm) D (mm) ISO Tolerance F7
Drill and head shaft are manufactured from a single piece of carbide blank. The advantage of this tool is high process reliability andperformance. Longer tool life is possible due to reduced torsional vibrations and higher rigidity.
Nose grind geometry
The nose grind geometry affect the following, hole tolerance, chip formation, coolant pressure and flow, tool life, centreline deviation
and surface quality. Over the years, botek has successfully tested a number of different nose grinds for drilling various materials.botek‘s experience has formed the foundation for the development of our standard nose grind geometries. This meets the require-ments of most drilling applications. Drilling of especially long chipping materials and difficult to machine materials usually call forspecial nose grind geometries, and in some cases, made to order chip breakers, all available from botek.
2-flute drills with brazed carbide tipType 120 / Type 122 / Type 125
Overview
Type Tool diameter
Type 120 2-flute drill
with solid carbide tip
tool diameter6.000 – 26.500 mm
Type 122 2-flute stepped solid drilling tool
with solid carbide tip
tool diameter4.510 – 26.500 mm
Type 1252-flute counterboring tool
with solid carbide tip
tool diameter4.000 – 40.000 mm
Type 125-032-flute counterboring tool
with guiding pilotwith solid carbide tip and steel shank
tool diameter6.000 – 26.500 mm
Type 120 available on request with cutting edge with PCD
Tool design
The botek 2-flute drill is fabricated with a drill head section of solid carbide tip, which is brazed to a heat treated tube (flute) sectionthen fitted and brazed to a hardened and ground steel driver.
Driver
Carbide tip Drill tube
Brazed joint Brazed joint
Standard nose grind
The nose grind geometry affect the following, hole tolerance, chip formation, coolant pressure and flow, tool life, centreline deviationand surface quality. Over the years, botek has successfully tested a number of different nose grinds for drilling various materials.
botek‘s experience has formed the foundation for the development of our standard nose grind geometries. This meets the requirements of most drilling applications. Deep-hole drilling of especially long chipping materials and difficult to machine materialsusually call for special nose grind geometries, and in some cases, made to order chip breakers, all available from botek.
2-flute drills are typically provided with a driver for holding the tool in the machine spindle.The driver transmits the torque from the machine spindle.botek provides a variety of standard drivers from stock as well as customer specific configurations.
Standard drivers for 2-flute gundrills with brazed carbide tip – Overview
Technical informationType 120 / Type 122 / Type 125
Cutting speed and feed rate are dependent on tool length, coolant type and materials. In addition, the stability of the machine andworkpiece clamping. All figures specified are guide values.
Reliable chip removal is only assured if sufficient coolant is supplied to the tool. The diagrams show our recommendation for coolantpressure and quantity by drill diameter.
The ideal viscosity of deep-hole drilling oil should be 15 mm²/s (60 - 70 SUS) at 40°C for drilling diameters up to 18 mm.
When using emulsion, the specied pressures (p) may be reduced by up to ~ 20 %.
For all drill diameters filtering is required between 5 µm and 20 µm.
The botek „Axial Pulsator“ has been developed to increase the feed rate of straight uted deep hole drilling tools, particulary drilling steel and other long chipping materials.
The typical quality characteristics of single ute and 2-ute gundrills like excellent surface nish, minimum run out, hole straightness and hole roundness and high process reliability can be achieved very economical in combination with the „Axial Pulsator“.
L
Ø
L
Ø
Copper without Pulsator with Pulsator with Pulsator
Tool Single flute gundrill Type 110 Single flute gundrill Type 110 Solid carbide 2-flute drill Type 123Diameter (mm) 8.0 8.0 8.0
Vf (mm/min) 40 120 200
Steel without Pulsator with Pulsator with Pulsator
Tool Single flute gundrill Type 110 Single flute gundrill Type 110 Solid carbide 2-flute drill Type 123
Diameter (mm) 8.0 8.0 8.0
Vf (mm/min) 90 - 100 150 - 180 200 - 1000
Large Pulsator
Drill diameter: 4.0 mm to 12.0 mm
Max. speed: 6,000 RPM Adjustable only by manufacturer (only stroke)Ø: 70 mmWeight: 4.4 kg L: 160 mm
Small Pulsator
Drill diameter: up to 4.0 mmMax. speed: 11,000 RPM Adjustable strokeØ: 50 mmWeight: 1.3 kg L: 140 mm
Technical appendix
Axial-Pulsator
Above mentioned values are guide values which could differ from your application.
To achieve optimum drilling results when using carbide tipped or solid carbide gundrills, various criteria must be applied. In additionto tool design, key factors are machine design and construction, process techniques, pressurized and filtered deep hole drillingcoolant. Selection of proper cutting parameters is also a significant factor.
The key factors botek considers when designing gundrills:
- Material type
- Diameter, tolerance and surface finish
- Peripheral contour
- Carbide grade and coating
- Nose grind geometry
In addition to our rened manufacturing and technology for consistent product quality, our application and technical experience help you realize optimal solutions.
Drilling sequence:
1. Drilling pilot hole (dimensions see table page 5).
2. Feed gundrill into pilot hole while non rotating or rotating slowly (< 50 U / min).
3. Switch on the coolant.
4. Switch on spindle rotation and feed.
5. After reaching the drilling depth switch off coolant and spindle rotation.
6. Switch off coolant.
7. Retract tool (maximum rotation not exceeding 200 rev. / min. without support). Take care for safety information (see backside).
1. Before using the drills make sure the machine has the necessary equipment to do proper deep hole drilling.
The machine should have suitable safety guarding for protection from cutting chips and coolant for operator. Check with machine builder!
2. Improper use or handling of deep hole drilling tools can cause serious injuries, e.g. skin cuts from the cutting edge.
3. Deep hole drilling tools are not self centering and can be unbalanced. Therefore the drills must be guided during the start ofthe drilling cycle by means of a sufficiently long drill bush or pilot hole.
4. Tool support: unsupported drill length should never exceed the dimensions as shown on table. If the unsupported drill length is exceeded the drill might cause injury.
Maximum unsupported drill length (L) between the steady rests or in a guide hole.
5. The gundrill is fed into a pilot hole while non rotating or rotated slowly at < 50 RPM (illustration). Then the coolant and themachine spindle should get started.
6. After reaching the drilling depth switch off the coolant and retract with the spindle stopped or slowly rotated at < 50 RPM.
7. Grinding of carbide produces dust (cobalt, etc.) that may be potentially hazardous. Use adequate ventilation and safety glassesduring grinding.
8. Consequences of not following our application notes No. 1 - 7.
Please note that all application notes and values contained herein are intended as guidelines only. We do notaccept any liability for damages caused by improper handling of botek deep hole drilling tools, operating errors,unsuitable machinery or misuse while using our tools!
If you have any questions, please do not hesitate to contact us. P: +49 7123 38 08-0.
Using botek gundrills other than directed may cause personal injury.
Tool breakage and unsupported gundrills can be extremely dangerous.
Please use with caution and care.
2-flute drill Drill dia. = D (mm)Maximum
unsupporteddrill length (L)
Solid carbide12.800 - 6.999 approx. 80 x D
17.000 - 12.000 approx. 60 x D
with brazeddrill head
14.000 - 19.999 approx. 40 x D
10.000 - 19.999 approx. 35 x D
20.000 - 27.000 approx. 30 x DExample 1: drill diameter, D = 2.0 mm, unsupported drill length up to maximum 80 mm = 40 x D
Example 2: drill diameter, D = 2.0 mm x 200 mm OAL, 1st support at 80 mm and 2nd support at 160 m