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FLENDER Standard CouplingsFlexible Couplings - N-EUPEX and N-EUPEX DS Series
General information
7/2 Siemens MD 10.1 · 2008
7
■ Overview
N-EUPEX as overload-holding, fail-safe series N-EUPEX DS as overload-shedding, non-fail-safe series
N-EUPEX and N-EUPEX DS claw couplings connect machines. They compensate for shaft misalignment, generating only low restorative forces.
The torque is conducted through elastomer flexibles, so the cou-pling has typically flexible rubber properties.
N-EUPEX couplings are overload-holding. By contrast, the N-EUPEX DS series is designed so that overload or advanced wear causes irreparable damage to the elastomer flexibles. The metal parts of N-EUPEX DS couplings can then rotate freely against one another without contact.
Elastomer flexible of the N-EUPEX series
The flexibles of the N-EUPEX coupling are subjected to com-pression. If the flexibles are irreparably damaged, the hub parts come into contact with metal. This “emergency operation capa-bility” is required, e.g., in the case of fire pump drives.
Elastomer flexible of the N-EUPEX DS series
The flexibles of the N-EUPEX DS series are subjected to com-pression and bending forces. If the flexibles are irreparably damaged, the metal parts turn against one another without con-tact, and the power transmission is separated. Fitting new flexi-bles will make the coupling once more usable. The capacity of the N-EUPEX DS series to shed overloads is especially in demand for highly sensitive machines.
FLENDER Standard CouplingsFlexible Couplings - N-EUPEX and N-EUPEX DS Series
General information
7/3Siemens MD 10.1 · 2008
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■ Benefits
N-EUPEX couplings are designed on the modular principle and have a very simple construction. N-EUPEX types are made up of subassemblies to suit requirements. The couplings are assem-bled by simply fitting the coupling halves together. Wear is re-stricted to the elastomer flexibles, which must be replaced at the end of their service life. Depending on type, the elastomer flexibles can be changed without moving the coupled machines. The coupling parts are readily available from stock and are mostly finish-machined, i.e. with finished bore, keyway, set screw and balancing.
Optionally:
The wear indicator for N-EUPEX couplings enables the condition of the flexible to be easily assessed. The wear condition can also be ascertained with the aid of a stroboscope while the coupling is rotating. The production process can thus continue undis-turbed.
If the stroboscope is to be used in a potentially explosive envi-ronment, you can enquire about the equipment for this at FLENDER.
The wear indicator must be attached to the outside diameter of the coupling after the coupling has been fitted.
■ Application
The N-EUPEX coupling is available as a catalog standard in 23 sizes with a rated torque of between 19 Nm and 62000 Nm. The coupling is suitable for use at ambient temperatures of between –30 °C and +80 °C. By using alternative elastomer buffers, the permissible ambient temperature range can be extended to be-tween –50 °C and +100 °C.
Frequently, the coupling is used to connect the motor to the gear unit input shaft. The coupling is suitable especially for drives with uniform to average dynamic loads. Examples of applications are pump drives, ventilator drives or crane running gear. Further-more, N-EUPEX couplings can be used as add-on couplings, particularly on FLUDEX fluid couplings or ARPEX AKR safety couplings. In the case of drives with a diesel engine, N-EUPEX couplings are suitable for driven machines with a low mass mo-ment of inertia.
In the case of diesel engine drives, the actual dynamic coupling load should be checked by measurement or torsional vibration calculations.
Coupling suitable for potentially explosive environments. Complies with Directive 94/9/EC for:
II 2 G T4 / T5 / T6 D120 °C–30 °C � Ta � +80 °C / +50 °C / +40 °C
I M2
■ Function
The motor torque is transmitted to the hub at the drive end via the shaft-hub connection, which is mostly designed as a keyway connection. The torque is transmitted to the hub on the output side with the aid of elastomer flexibles. The hub on the output side further transmits the torque to the driven machine or a gear unit placed in between. Because of the primarily compression-loaded elastomer flexibles, the coupling has a progressive tor-sional stiffness.
In the case of the N-EUPEX DS coupling series, the elastomer flexible is subjected to bending and compression loads. In the event of overload or advanced wear, the coupling disconnects positively and the flexibles are irreparably damaged. The metal parts then rotate without touching one another. After new elas-tomer flexibles are fitted, the N-EUPEX DS coupling is once more operable.
N-EUPEX DS couplings are maintenance-free, even in poten-tially explosive environments, so long as the possible torque in-terruption does not lead to an unacceptable disruption of the production process.
FLENDER Standard CouplingsFlexible Couplings - N-EUPEX and N-EUPEX DS Series
General information
7/4 Siemens MD 10.1 · 2008
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■ Design
N-EUPEX and N-EUPEX DS couplings consist of two hub parts mounted on the machine shafts. The coupling parts are con-nected positively by means of elastomer flexibles. On the two-part variant, the elastomer flexibles can be changed only if one
of the coupled machines is moved. On the three-part variants, the bolted cam ring can be released and moved to enable the flexible to be changed without moving the coupled machines.
Materials
Cam parts, pocket parts, adapters and hubs
Grey cast iron EN-GJL-250
Flexible materials• N-EUPEX series
• N-EUPEX DS series
PU elastomer flexibles in special design on request.
The technical data and product codes do not include the flexible variants NBR low-backlash, HNBR high temperature and NR low temperature and the DS flexibles polyurethane electri-cally insulating.
Technical data, prices and product codes on request.
Brake disks
EN-GJS-400 spheroidal graphite cast iron or S355J2G3 steel
Brake drums
Grey cast iron EN-GJL-250
Low-temperature application
Shock loads in the drive caused by e.g. starting of drives with large masses to be accelerated (e.g. in fan drives) result in high component loads, particularly at low temperatures.For such applications a particularly robust coupling series must be selected. Of the flexible couplings, the RUPEX pin-and-bush coupling is especially suited for this.
Types of N-EUPEX claw coupling
Further application-related coupling types are available. Dimension sheets for and information on these are available on request.
Types of N-EUPEX claw coupling on request
Material/description Hardness Identification Ambient temperatureNBR standard type 80 Shore A Flexible black with blue stripe –30 °C … +80 °CNBR soft 65 Shore A Flexible black with green stripe –30 °C … +80 °CNBR hard 90 Shore A Flexible black with magenta stripe –30 °C … +80 °CNBR normal low-backlash 80 Shore A Flexible black with yellow stripe –30 °C … +80 °CNBR soft low-backlash 65 Shore A Flexible black with white stripe –30 °C … +80 °CNR for low temperature 80 Shore A Flexible black with orange stripe –50 °C … +50 °CHNBR high temperature 80 Shore A Flexible black with red stripe –10 °C … +100 °C
PU electrically insulating 95 Shore A Flexible blue –30 °C … +50 °C
Type DescriptionA Fail-safe, 3-partB Fail-safe, 2-part D Fail-safe, 3-part, flange variantE Fail-safe, 2-part, flange variantH Fail-safe, with adapterO Fail-safe, 2-part, with brake drumP Fail-safe, 3-part, with brake drumEBD Fail-safe, 2-part, with brake diskDBD Fail-safe, 3-part, with brake diskDBDR Fail-safe, 3-part, with brake disk,
brake disk radially dismountableADS Non-fail-safe, 3-partBDS Non-fail-safe, 2-part HDS Non-fail-safe, with adapter
Type DescriptionAT Fail-safe, 3-part, with Taper clamping bushBT Fail-safe, 2-part, with Taper clamping bushG Fail-safe, 2-part, with intermediate shaftF Fail-safe, 3-part, with intermediate shaftK Fail-safe, 3-part, with brake drum to customer's requirementL Fail-safe, 2-part, with brake drum to customer's requirementM Fail-safe, 2-part, with flange dimensions to
FLENDER Standard CouplingsFlexible Couplings - N-EUPEX and N-EUPEX DS Series
General information
7/7Siemens MD 10.1 · 2008
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■ Technical data
Power ratings of the N-EUPEX series
For maximum coupling torque: TKmax = 3.0 � TKN
For coupling overload torque: TK0L = 3.5 � TKN
For coupling fatigue torque: TKW = 0.15 � TKN, where TN > TW must be adhered to.
Torsional stiffness and damping
The values stated in the above table apply to a capacity utiliza-tion of 50 %, an excitation amplitude of 10 % TKN with the fre-quency 10 Hz and an ambient temperature of 20 °C. Dynamic torsional stiffness is dependent on load and increases in propor-tion to capacity utilization. The following table shows the correc-tion factors for different nominal loads.
CTdyn = CTdyn 50 % � FKC
The damping coefficient is � = 1.4
Furthermore, torsional stiffness and damping depend on the am-bient temperature and the frequency and amplitude of the tor-sional vibration excitation. More precise torsional stiffness and damping parameters on request.
Permitted shaft misalignment
The permitted shaft misalignment depends on the operating speed. As the speed increases, lower shaft misalignment values are permitted. The following table shows the correction factors for different speeds. The maximum speed for the respective coupling size must be observed!
�Kperm = �K1500 � FKV
The axial misalignment may occur dynamically at frequencies up to 10 Hz. For fitting, a maximum gap dimension of Smax = S + �S and a minimum gap dimension of Smin = S – �S are permitted. Shaft misalignments �Ka, �Kr and �Kw may occur simultaneous-ly.
Size Rated torque for flexible type
Torsional stiffness at 50 % capacity utilization for flexible type
Assembly Permitted shaft misalignment at n = 1500 rpm 1)
1) The maximum speed of the respective type must be noted. For further information on permissible shaft misalignment, please see the operating instructions.
FLENDER Standard CouplingsFlexible Couplings - N-EUPEX and N-EUPEX DS Series
General information
7/8 Siemens MD 10.1 · 2008
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Power ratings of the N-EUPEX DS series
Flexibles of sizes 66 to 272 are of the compound type with a hard core and soft thrust pieces. Sizes 305 to 556 are completely made of 90 ShoreA NBR material.
For maximum coupling torque: TKmax = 2.0 � TKN
For coupling overload torque: TK0L = 3.0 � TKN
For coupling fatigue torque: TKW = 0.15 � TKN
Torsional stiffness and damping
The values stated in the above table apply to a capacity utiliza-tion of 50 %, an excitation amplitude of 10 % TKN with the fre-quency 10 Hz and an ambient temperature of 20 °C. Dynamic torsional stiffness is dependent on load and increases in propor-tion to capacity utilization. The following table shows the correc-tion factors for different rated loads.
CTdyn = CTdyn 50 % � FKC
The damping coefficient is � = 1.4 Torsional stiffness and damping is further dependent on the am-bient temperature and the frequency and amplitude of the tor-sional vibration excitation. More precise torsional stiffness and damping parameters on request.
Permitted shaft misalignment
The permitted shaft misalignment depends on the operating speed. As the speed increases, lower shaft misalignment values are permitted. The following table shows the correction factors for different speeds. The maximum speed for the respective coupling size must be noted!
�Kperm = �K1500 � FKV
The axial misalignment may occur dynamically at frequencies up to 10 Hz. For fitting, a maximum gap dimension of Smax = S + �S and a minimum gap dimension of Smin = S – �S are permitted.
Shaft misalignments �Ka, �Kr and �Kw may occur simulta-neously.
Size Rated torque Torsional stiffness at 50 % capacity utilization
Assembly Permitted shaft misalignment at speed n = 1500 rpm
Gap dimension Axial Radial AngleTKN CTdyn �S �Ka �Kr �KwNm kNm/rad mm mm mm °
FLENDER Standard CouplingsFlexible Couplings - N-EUPEX and N-EUPEX DS Series
Type A for easy elastomer flexible replacement
7/10 Siemens MD 10.1 · 2008
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■ Selection and ordering data
The hub diameter of the component part is assigned according to the diameter of the finished bore. Where bore diameters over-lap, the component with the smaller hub diameter is always se-lected.
Weights and mass moments of inertia apply to maximum bore diameters.
The product code applies to standard flexibles of 80 ShoreA; the product code for alternative flexible types is available on request.
Ordering example:N-EUPEX A coupling, size 200, Part 1: Bore D1 65H7 mm, keyway to DIN 6885-1 and set screw, Part 2: Bore D2 50H7 mm, keyway to DIN 6885-1 and set screw.
Product code: 2LC0101-0AB99-0AA0L1F+M1C
ØN
D1
ØN
D2
ØD
A
NL2S
NL1
U1 PU2
LG
ØD
1
ØD
2
J1 J2 Part 2Part 1 Part 3
G_M
D10
_EN
_000
78
Size Rated torque flexible type80 ShoreA
Speed Dimensions in mm Mass moment of inertia
Product code WeightBore with keyway to DIN 6885
Order codes for bore diameters and tolerances are specified in catalog section 3TKN nKmax D1 D2 DA ND1 ND2 NL1/
• Without finished bore sizes 315 to 520 for 2nd diameter range D1 – Without order codes 2• With finished bore – With order codes for diameter and tolerance (product code without -Z) 9
�D2: • Without finished bore – Without order codes 1• Without finished bore sizes 315 to 520 for 2nd diameter range D2 – Without order codes 2• With finished bore – With order codes for diameter and tolerance (product code without -Z) 9
FLENDER Standard CouplingsFlexible Couplings - N-EUPEX and N-EUPEX DS Series
Type B
7/11Siemens MD 10.1 · 2008
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■ Selection and ordering data
Weights and mass moments of inertia apply to maximum bore diameters.
Ordering example:N-EUPEX B coupling, size 95, Part 1: Bore D1 42H7 mm, keyway to DIN 6885-1 and set screw, Part 2: Bore D2 32H7 mm, keyway to DIN 6885-1 and set screw.
Product code: 2LC0100-3AA99-0AA0L0X+M0T
The product code applies to standard flexibles of 80 ShoreA; the product code for alternative flexible types is available on request.
ØN
D1
ØD
A
U1U2
NL2S
NL1
LG
ØD
1
ØN
D2
ØD
2
J1 J2 Part 4Part 1
G_M
D10
_EN
_000
79
Size Rated torque flexible type80 ShoreA
Speed Dimensions in mm Mass moment of inertia
Product code WeightBore with keyway to DIN 6885
Order codes for bore diameters and tolerances are specified in catalog section 3TKN nKmax D1 D2 DA ND1 ND2 NL1/
FLENDER Standard CouplingsFlexible Couplings - N-EUPEX and N-EUPEX DS Series
Type H
7/13Siemens MD 10.1 · 2008
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During assembly, the gap dimension S2 must not exceed the permissible tolerance of +1 mm.
The hub diameter of the component part is assigned according to the diameter of the finished bore. Where bore diameters over-lap, the component with the smaller hub diameter is always se-lected.
Weights and mass moments of inertia apply to maximum bore diameters.
Ordering example:N-EUPEX H coupling, size 160, S = 200 mm, Part 1: Bore D1 60H7 mm, keyway to DIN 6885-1 and set screw, Part 2: Bore D2 55H7 mm, keyway to DIN 6885-1 and set screw.
Product code: 2LC0100-7AG99-0AD0L1E+M1D
The product code applies to standard flexibles of 80 ShoreA; the product code for alternative flexible types is available on request.
Size Rated torque flexible type80 ShoreA
Speed Dimensions in mm Mass moment of inertia
Product code WeightBore with keyway to DIN 6885
Order codes for bore diameters and tolerances are specified in catalog section 3TKN nKmax D1 D2 DA ND1 ND2 NL1 NL2 S2 S LZ DZ LG J1 J2 m
120 160 265 1.7 2LC0101-7AG ■ ■ -0AE0 230�D1: • Without finished bore – Without order codes 1
• Without finished bore sizes 315 to 440 for 2nd diameter range D1 – Without order codes 2• With finished bore – With order codes for diameter and tolerance (product code without -Z) 9
�D2: • Without finished bore – Without order codes 1• Without finished bore sizes 315 to 440 for 2nd diameter range D2 – Without order codes 2• With finished bore – With order codes for diameter and tolerance (product code without -Z) 9
100 150 250 1.1 90�D2: • Without finished bore – Without order codes 1
• Without finished bore – Only for sizes 315 to 520 in each case with a larger diameter D2 – Without order codes 2• With finished bore – With order codes for diameter and tolerance (product code without -Z) 9
FLENDER Standard CouplingsFlexible Couplings - N-EUPEX and N-EUPEX DS Series
Type D for easy elastomer flexible replacement
7/15Siemens MD 10.1 · 2008
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The hub diameter of the component part is assigned according to the diameter of the finished bore. Where bore diameters over-lap, the component with the smaller hub diameter is always selected.
Weights and mass moments of inertia apply to maximum bore diameters.
Ordering example:N-EUPEX D coupling, size 125, Part 10: with through bores,Part 2: Bore D2 38H7 mm, with keyway to DIN 6885-1 and set screw.
Product code: 2LC0100-5AD19-0AA0M0V
The product code applies to standard flexibles of 80 ShoreA; the product code for alternative flexible types is available on request.
Order codes for bore diameters and tolerances are specified in catalog section 3
TKN nKmax D2 DA ND2 NL2 S2 S LG DFA DFN DFK FB ZF DFB J1 J2 mmin. max. h8 H7
Nm rpm kgm2 kgm2 kg
�D2: • Without finished bore – Without order codes 1• Without finished bore – Only for sizes 315 to 520 in each case with a larger diameter D2 – Without order codes 2• With finished bore – With order codes for diameter and tolerance (product code without -Z) 9
FLENDER Standard CouplingsFlexible Couplings - N-EUPEX and N-EUPEX DS Series
Type O with brake drum
7/18 Siemens MD 10.1 · 2008
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■ Selection and ordering data
Weights and mass moments of inertia apply to maximum bore diameters.
Ordering example:N-EUPEX O coupling, size 200, brake drum 315 x 118 mm,Part 32: Bore D1 55H7 mm, keyway to DIN 6885 P9 and set screw, Part 4: Bore D2 60H7 mm, keyway to DIN 6885 and set screw.
Coupling micro-balanced G6.3 at 1500 rpm in accordance with half parallel key standard.
Product code: 2LC0101-0AE99-0DA0-ZL1D+M1E+W02
The product code applies to standard flexibles of 80 ShoreA; the product code for alternative flexible types is available on request.
ØN
D1
ØD
B
ØD
1
ØD
2Ø
ND
2Ø
DA
U2
BB
NL2S
S2
NL1LG
1J 2J
Part 4Part 32 Part 10
G_M
D10
_EN
_000
84Size Rated
torque flexible type80 ShoreA
Speed Dimensions in mm Mass moment of inertia
Product code WeightBore with keyway to DIN 6885
Order codes for bore diameters and tolerances are specified in catalog section 3TKN nKmax D1 D2 DA ND1 ND2 NL1
FLENDER Standard CouplingsFlexible Couplings - N-EUPEX and N-EUPEX DS Series
Type EBD with brake disk
7/21Siemens MD 10.1 · 2008
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■ Selection and ordering data
For dimension U2, see type B
Weights and mass moments of inertia apply to maximum bore diameters.
Ordering example:N-EUPEX EBD coupling, size 200, brake disk DIN 15432-AM-400 mm x 30 mm, Bore D1 55H7 mm, with keyway to DIN 6885 P9 and set screw, Bore D2 60H7 mm, with keyway to DIN 6885 and set screw.Coupling micro-balanced G6.3 at 1500 rpm in accordance with the half parallel key standard.
Product code: 2LC0101-0AW99-0ZA0-ZL1D+M1E+P0Y+W02plain text to P0Y: DB = 400 mm; BB = 30 mm; D6 = 220 mm; NL1 = 211.5 mm
The product code applies to standard flexibles of 80 ShoreA; the product code for alternative flexible types is available on request.
Other brake disk diameters DB and brake disk widths BB on request.
Maximum speed in rpmnmax = 1146/DB DB in m
ØN
D1
ØD
6
ØD
1
ØD
B
S2U2
BBL6
NL2SNL1LG
ØN
D2
ØD
A
ØD
2
1J 2J
G_MD10_EN_00087
Part 32
Part 1 Part 4
Size Rated torque flexible type80 ShoreA
Dimensions in mm Mass moment of inertia
Product code WeightBore with keyway to DIN 6885
Plain text specification DB; BB; D6; NL1 required for order code P0YOrder codes for bore diameters and tolerances are specified in catalog section 3
TKN D1 D2 DA ND1 ND2 NL1 NL2 S S2 DB D6 BB L6 LG J1 J2 mmax. min. max. min. min. min. min.
FLENDER Standard CouplingsFlexible Couplings - N-EUPEX and N-EUPEX DS SeriesType ADSfor easy elastomer flexible replacement
7/22 Siemens MD 10.1 · 2008
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■ Selection and ordering data
The hub diameter of the component part is assigned according to the diameter of the finished bore. Where bore diameters over-lap, the component with the smaller hub diameter is always se-lected.
Weights and mass moments of inertia apply to maximum bore diameters.
Ordering example:N-EUPEX ADS coupling, size 135, Part 1: Bore D1 42H7 mm, keyway to DIN 6885 and set screw, Part 2: Bore D2 32H7 mm, keyway to DIN 6885 and set screw.
Product code: 2LC0110-5AB99-0AA0L0X+M0T
The product code applies to NBR standard flexibles; the product code for alternative flexible type is available on request.
ØN
D1
ØN
D2
ØD
A
NL2S
NL1
U1 PU2
LG
ØD
1
ØD
2
1J 2J Part 2Part 1 Part 3
G_M
D10
_EN
_000
88
Size Rated torque
Speed Dimensions in mm Mass moment of inertia
Product code WeightBore with keyway toDIN 6885
Order codes for bore diameters and tolerances are specified in catalog section 3TKN nKmax D1 D2 DA ND1 ND2 NL1/
140 190 315 4.7 290�D1: • Without finished bore – Without order codes 1
• With finished bore – With order codes for diameter and tolerance (product code without -Z) 9�D2: • Without finished bore – Without order codes 1
• Without finished bore from size 340 for 2nd diameter range D2 – Without order codes 2• With finished bore – With order codes for diameter and tolerance (product code without -Z) 9
FLENDER Standard CouplingsFlexible Couplings - N-EUPEX and N-EUPEX DS Series
Type BDS
7/23Siemens MD 10.1 · 2008
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■ Selection and ordering data
Weights and mass moments of inertia apply to maximum bore diameters.
Ordering example:N-EUPEX BDS coupling, size 103, Part 1: Bore D1 42H7 mm, keyway to DIN 6885 and set screw, Part 4: Bore D2 32H7 mm, keyway to DIN 6885 and set screw.
Product code: 2LC0110-3AA99-0AA0L0X+M0T
The product code applies to NBR standard flexibles; the product code for alternative flexible type is available on request.
ØN
D1
ØD
A
U1U2
NL2S
NL1
LG
ØD
1
ØN
D2
ØD
2
1J 2JPart 4Part 1
G_M
D10
_EN
_000
89
Size Rated torque
Speed Dimensions in mm Mass moment of inertia
Product code WeightBore with keyway toDIN 6885
Order codes for bore diameters and tolerances are specified in catalog section 3TKN D1 D2 DA ND1 ND2 NL1/
FLENDER Standard CouplingsFlexible Couplings - N-EUPEX and N-EUPEX DS Series
Type HDS
7/25Siemens MD 10.1 · 2008
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During assembly, the gap dimension S2 must not exceed the permissible tolerance of +1 mm.
Weights and mass moments of inertia apply to maximum bore diameters.
Ordering example:N-EUPEX HDS coupling, size 103, S3 = 100 Part 1: Bore D1 42H7 mm, keyway to DIN 6885-1 and set screw, Part 5: Bore D2 32H7 mm, keyway to DIN 6885-1 and set screw.
Coupling micro-balanced G6.3 at 1500 rpm in accordance with the half parallel key standard.
Product code: 2LC0110-3AC99-0AA0-ZL0X+M0T+W02
The product code applies to NBR standard flexibles; the product code for alternative flexible type is available on request.
FLENDER Standard CouplingsFlexible Couplings - N-EUPEX and N-EUPEX DS Series
Spare and wear parts
7/26 Siemens MD 10.1 · 2008
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■ Selection and ordering data
Elastomer flexibles
The elastomer flexibles are wear parts. The service life depends on the operating conditions.
Elastomer flexibles of the N-EUPEX series Elastomer flexibles of the N-EUPEX DS series
Flexibles of sizes 66 to 272 are of the compound type with a hard core and soft thrust pieces. Sizes 305 to 556 are completely made of 90 ShoreA NBR material.
Size Product code flexible set for one coupling
Number of flexibles per set
Weight per set
NBR elastomer flexibles 80 ShoreA standard type kg