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Page 6.1Motion Technology
BSC State Office NSW (02) 9824 2099 VIC (03) 9560 3222 QLD (07) 3866 8300Phone Numbers: SA (08) 8349 8388 TAS (03) 6326 6011 WA (08) 9337 3000
Coupling Identification Chart.............................................................. 6.1aElement Identification Chart ............................................................... 6.1bElectric Motor and Coupling Data Sheet ............................................ 6.22-Pole Electric Motor Selection Chart ................................................ 6.2a4-Pole Electric Motor Selection Chart ................................................ 6.2b6-Pole Electric Motor Selection Chart ................................................ 6.2c8-Pole Electric Motor Selection Chart ................................................ 6.2dCouplings Preselection Comparisons ............................................... 6.3Jaw Service Factors .......................................................................... 6.4Jaw Selection Data (L, C and LS Series) .......................................... 6.5Sleeve and Flexible Element Chemical Resistance Chart ................. 6.5aShaft Couplings - L and LS Series ..................................................... 6.6Shaft Couplings - L, C & CS Series ................................................... 6.7Shaft Couplings - L Series Hubs ........................................................ 6.7aSpacer Couplings ............................................................................... 6.7S Flex Service Factors ........................................................................ 6.8S Flex Selection Data .......................................................................... 6.9S Flex Couplings ................................................................................. 6.10Tapered Bush Entry ............................................................................ 6.10Gear Service Factors .......................................................................... 6.11Gear Selection Data - (C) & (F) .......................................................... 6.12Gear Couplings - Continuous Sleeve................................................. 6.13Gear Couplings - Flanged Sleeve ...................................................... 6.13Service Factor Overview .................................................................... 6.14Grid Coupling Interchange ................................................................. 6.15Grid Coupling Ratings ........................................................................ 6.15Centaflex Couplings ........................................................................... 6.15aDeltaflex Couplings ............................................................................. 6.17Miniature Couplings ........................................................................... 6.18Rigid Couplings .................................................................................. 6.20aBrake Drum Couplings ....................................................................... 6.20bFlexicone Couplings ........................................................................... 6.20cTyre Couplings.................................................................................... 6.20fHRC Shaft Couplings.......................................................................... 6.20jUniversal Joints .................................................................................. 6.21Chain Couplings ................................................................................. 6.23Torque Limiters ................................................................................... 6.24Couplings Installation & Maintenance Tips ........................................ 6.25
SHAFT COUPLINGS
Gear Flanged Sleeve
AGMA (eq)
JAW COUPLINGS
Gear Continuous Sleeve
Drivers : E, G, H, SDrivers : E, G, H, SBores : PBBores : PB
Drivers : E, G, H, SDrivers : E, G, H, SBores : PBBores : PB
Drivers : D, E, G, H, P, SDrivers : D, E, G, H, P, SBores : PBBores : PB
Drivers : D, E, G, H, P, SDrivers : D, E, G, H, P, SBores : PBBores : PB
Drivers : EDrivers : E (Misaligned)(Misaligned)Bores : PBBores : PB
Drivers : D, E, H, PDrivers : D, E, H, PBores : BS, PBBores : BS, PB
Most Suitable Drivers:
COUPLING IDENTIFICATION CHART
DD - Diesel,- Diesel, E E - Electric,- Electric, GG - Output Shaft of Gear Box,- Output Shaft of Gear Box, HH - Hydraulic,- Hydraulic, PP - Petrol ,- Petrol , SS - Steam- SteamEx-Stock Shaft Finish:
B SB S - B o r e d t o S i z e ,- B o r e d t o S i z e , PBPB - P i l o t B o r e ,- P i l o t B o r e , S PS P - S p l i n e ,- S p l i n e , T B T B - T a p e r e d B u s h- T a p e r e d B u s h
TYRE COUPLINGS MINIATURE COUPLINGS
PUMP SPACER (Dropout) COUPLINGS
METALLIC COUPLINGS
The Manual
Disc Spacer
A.P.I.
Drivers : E, G, H, SDrivers : E, G, H, SBores : PBBores : PB
Drivers : E, G, SDrivers : E, G, SBores : PBBores : PB
Drivers : E, GDrivers : E, GBores : PB, TBBores : PB, TB
Coni-Ring
Drivers : D, E, P, SDrivers : D, E, P, SBores : PB, TBBores : PB, TB
HRC (eq)
Drivers : D, E, H, PDrivers : D, E, H, PBores : BS, PB, SPBores : BS, PB, SP
Centaflex D & E
Drivers : D, E, H, PDrivers : D, E, H, PBores : BS, PB, SPBores : BS, PB, SP
Centaflex ACJ Curved Jaw
Drivers : D, E, H, PDrivers : D, E, H, PBores : PBBores : PB
L - Series (Jaw-in-Shear)
Drivers : D, E, H, PDrivers : D, E, H, PBores : BS, PBBores : BS, PB
DESIGN TYPES
Standard Slip Fit(S) JE Sleeve JES Sleeve E Sleeve H(So l id ) & HS (Split)
C e n t a A E l e m e n t Centa D & E Element Centa B Element l Dot = Neoprene l Dot = Neoprene l Dot = Neoprene HYTREL
Spider SOX (Standard) Spider URE (Urethane) Spider HYT (Hytrel) C e n t a H E l e m e n t Centamax
(Light duty only)
Sp ider BZR (Bronze ) S p i d e r S O X ( O p e n C e n t r e ) SW Kit (with circlip) Tyre : S(Synthet ic) & F(FRAS) Polyurethane Tyre
LC Kit (with r ing) SW Spider L225 Spider URE AL150 Spider (8-Jaw) H R C E l e m e n t F lex i Cone Rings & P ins /Nuts NEP Element
Nylon Sleeve CJ24/32-CJ65/75(8-Jaw)
C C u s h i o n s (Blue sleeve available) C J 1 5 / 9 0 - C J 1 2 5 / 1 4 5 ( 1 0 - J a w ) C J 1 9 / 2 4 SAGA
Gr id & Grease Mini Sof t Mini Jaw B e a m O l d h a m
L Series - Bored To Size Ex-Stock HP .5 .75 KW .37 .55
D71 FramePrice Factor - Increased Cost over Standard L Series Coupling
NOTE: This is a guide only and all selections should be individually confirmed in the couplings technical information including torque,max shaft size,misalignment, max RPM, dimensions and special requirements.
S Flex - Bored To Size Ex StockPrice Factor - Increased Cost over Standard L Series Coupling
NOTE: This is a guide only and all selections should be individuallyconfirmed in the couplings technical information including torque,max shaft size,misalignment, max RPM, dimensions and specialrequirements.
Price Factor - Increased Cost over Standard L Series Coupling
NOTE: This is a guide only and all selections should be individuallyconfirmed in the couplings technical information including torque,max shaft size,misalignment, max RPM, dimensions and specialrequirements.
Material Solid Standard Split Circlip Split Covers Open CentreSOX (NBR) SOX SW Kit LC Kit SOXOCTUrethane (URE) 1.5x Standard Torque - - - UREHytrel (HYT) 3x Standard Torque - - - HYT
Material Solid 1 Split 2 SplitEDPM (Standard) JE JES ENeoprene JN JNS NHytrel (3x Standard Torque) H - HS
Material Solid Standard Split Circlip Split Covers Open CentreL Series Spiders (Element)
Material Solid 1 Split 2 Split
S Flex Sleeves (Element)Price Factor - Increased Cost over Standard L Series Coupling
NOTE: This is a guide only and all selections should be individually confirmed in the couplings technical information including torque, max shaft size,misalignment, max RPM, dimensions and special requirements.
Page 6.3Motion Technology
SHAFT COUPLINGS
Couplings Preselection Comparisons
LovejoyComparison
Not A
pplicable
Application Guide
Driver Typical Coupling Used
Electric Motor LS, S-Flex, Jaw, Gear, Grid, Delta Flex
High Torque Drives Gear, Grid
Petrol Motor Centa, A, D, H Centamax, Grid, LS & Jaw
Diesel Motor Centa, A, D, H Centamax, Grid, LS & Jaw
Hydraulic Motor LS, Jaw, Grid, Centa, Gear (Nylon Sleeve), S-Flex
Shaft Size Range - inch .125 to 7.00 .125 to 7.00 .375 to 5.50 .125 to .50 .625 to 54.0 .313 to 1.625 .31 to 5.00 .438 to 5 .50 to 7.0 .250 to 2.50 1.188 to 4.750
Shaft Size Range - mm 4 to 178 4 to 178 9 to 140 3 to 12 15 to 1372 8 to 41 7 to 130 11 to 127 13 to 178 6 to 65 30 to 120.65
Torque Range - Nm 38 to 4,237 10.4to19,209 6.78 to 8,189 0.2 to 1.9 284 to 18 to 160 10 to 5,000 84 to 3,728 48 to 12 to 15,592 40 to 22.60
6,144,982 306000
Maximum Angular 2° 1° to 1.5° 1° 5° 1.5° 3° to 5° 3° 6° .25° 25° 3°
Misalignment Capability
Temperature Range -40° to 212°F -30° to 275°F -40° to 200°F -40° to 225°F -13° to 150°F -40° to 194°F -40° to 300°F -40° to 250°F -40° to 225°F -60° to 200°F
Standard Element -34° to 93° -40° to 100°C -34° to 135°C -40° to 93°C -40° to 107°C -25° to 66°C -40° to 90°C -40° to 149°C -40° to 121°C -40° to 107°C -50° to 53°C
Reactionary Loads due Low Medium Low Low Medium Medium Medium Low Low High Low
to Misalignment
Torque to O.D. Capability Excellent G o o d Fair P o o r Excellent Fa i r G o o d G o o d G o o d Excellent Fa i r
Speed Capability G o o d G o o d Fair G o o d Excellent Fa i r Fa i r Fa i r Excellent Fa i r G o o d
Torsional Stiffness Low Low Low Medium High High Low High G o o d High Low
Ease of Installation / Excellent Excellent Excellent Excellent Fa i r Excellent Fa i r Fa i r Fa i r Fa i r G o o d
Maintenance
Chemical Resistance Excellent G o o d G o o d Excellent Fa i r G o o d Fair Excellent Excellent Fa i r Fa i r
Adaptable to Several Excellent Excellent Excellent P o o r Excellent P o o r G o o d G o o d G o o d G o o d G o o d
Designs
Damping Capacity G o o d G o o d Excellent P o o r P o o r P o o r Excellent P o o r Fai r P o o r Excellent
Split Element Y e s Y e s Y e s N A N A N A N A N A Y e s N A N A
RECOMMENDED WITH DRIVER
Electric Motors Y e s Y e s Y e s Y e s Y e s Y e s Y e s Y e s
Note:Caution: Applications involving reciprocating enginesand reciprocating driven devices are subject to criticalrotational speeds which may damage the couplingand/or connected equipment.
Acetone C C B A BAmmonia Anhydrous - - - A AAmmonium Hydroxide Solutions C C A A A (158F)ASTM oil No. 1 A A A C AASTM oil No. 3 A B A C B-C (158F)ASTM reference fuel A A A A C BASTM reference fuel B A B A C CASTM reference fuel C B C B C CBenzene C C B C CButane A A A C ACarbon Tetrachloride C C C C CChlorobenzene C C C C CChloroform C C C C CChromic Acid 10 - 50% C C - C CDowtherm A or E Solvent - - - C CEthyl Alcohol C C A A A (158F)Ethylene Glycol A B A A A (158F)Fuel Oil A C - C AGasoline A B A C BGlycerin A C A A AHydraulic Oils (Petroleum based) A A A C A-BHydrochloric Acid, 37% (cold) C C C A A-BHydrogen Peroxide, 90% C - - C CIsopropyl Alcohol B C A A A-BKerosene A B A C B-CLacquer Solvents (MEK) C C C C CLubricating Oils B - A C BMethyl Alcohol C C A A AMineral Oil A A A C BNapththa C C A C CNitric Acid, 10% C C B B BNitrobenzene C C C C CPhenol C C B C CPhosphoric Acid, 20% C A - A BPhosphate Esters - - A C CPickling Solution(20% Nitric Acid, 4% HP) C C C C CSoap Solutions A A A A A (185F)Sodium Hydroxide, 20% B B A A BStearic Acid B A A B B (158F)Sulfuric Acid, up to 50% C C A B A-B (158F)Sulfuric Acid, 50% to 80% C C C B B-CTannic Acid, 10% A - A A A-BToluene C C A C CTrichloroethylene C C B C CTurpentine A C - C CWater A - B (158F) A (158F) A (212F)Xylene C C B C C
A = Fluid has little or no effectB = Fluid has minor to moderate effectC = Fluid has severe effect - = No data available
COUPLINGS Lovejoy
Sleeve and Flexible Element Chemical Resistance Chart
Resistance To: NBR (�SOX�) Urethane Hytrel EPDM Neoprene
Page 6.6 Motion Technology
Nm (Torque) = (Kw x 9550 x S.F.)
RPM
SHAFT COUPLINGS
Torque H U B SW KIT LS (ShearSplit) Spider Spider LC KITOD SOX Pilot Max Bored to size (Standard) Split Spider Hytrel Bronze Split
Size (mm) (Nm) Bore Bore Inch MM Spider SOX Circlip (URE) (HYT) (BRO) Cover
Shaft Couplings - L Series (Fail Safe) & LS Series (Split Shear)
LovejoyLovejoyLovejoyLovejoyLovejoyL & LS Series Jaw
L Series Jaw Couplings are the most popular in the world.
SW Kit Max RPM 1750 BRZ Spider Max RPM 250 3 times torqueURE Spider 1.5 standard torque HYT Spider 3 times standard torqueLC KIT Max RPM 3600
S.F. is the service factor which is in all Lovejoy Catalogues or available from any BSC Centre.
u Fail-safe - will still perform if elastomer fails.u No metal to metal contact.u Resistant to oil, dirt, sand, moisture and grease.u More than 850 000 combinations of bore sizes.u Most types available from stock in 24 hours.
RRS095 TO RRS110: SPACER COMPLETE - 1 SPACER, 2-SW-KITSRRS150 TO RRS225: SPACER COMPLETE - 1 SPACER, 2-SW-KITS(1 SW-KIT LOOSE)
Torque H U B SW KIT LS (Split Shear) Spider Spider LC KITOD SOX Pilot Max Bored to size Split & Spider Hytrel Bronze Split
Size (mm) (Nm) Bore Bore Inch MM Spider SOX Circlip (URE) (HYT) (BRO) Cover
Spacer PN Coupling PN Max Nm Spacer LengthSpacer Couplings
Size O.D.(mm) SOX Max Nm LS (Split Shear) SXB & HYT SXB Cushion HYT Cushion
Shaft Couplings - C Series
Shaft Couplings - L Series & C Series (Fail Safe) & LS (Split Shear)
LC Coupling
AL CouplingsAluminium
SHAFT COUPLINGS
AL 050, AL 070, AL 075AL 090/095, AL 099/100,AL 150
Torque
Nm = Kw x 9550 x SFRPM
Lovejoy
Page 6.7aMotion Technology
COUPLINGS L Series HubsLovejoyLovejoyLovejoyLovejoyLovejoy
L Series TL Series TL Series TL Series TL Series Tapered Bush Entry Hubsapered Bush Entry Hubsapered Bush Entry Hubsapered Bush Entry Hubsapered Bush Entry Hubs
PART NUMBER EXAMPLE
L100 - 9T 16/32
Hub Size Teeth Pitch
L Series Hub Spline BoreL Series Hub Spline BoreL Series Hub Spline BoreL Series Hub Spline BoreL Series Hub Spline Bore
FRONT MOUNT (TBF)Hub Part No OD Jaw ID LTB Bushing Min Hub OD Large OD Small OD Width
Note: “Min Hub OD” refers to the minimum hub Outside Diameter required for the given bushing assuming a 20,000 psi hub material. Dimensions are in inches.
This refers to hubs machined to allow insertion of the bushing from the“jaw” side of the hub.
This refers to hubs machined to allow insertion of the bushing from the“non-jaw” side of the hub.
Notes: 1. All pressure angles on above splines = 30°. Class 5 fit is standard, unless otherwise specified.2. All stock spline bore hubs are supplied standard with Lovejoy’s exclusive Centaloc Spline Locking Feature.
Woodworking Machinery 1.25 1.50 1.00Note:Caution: Applications involving reciprocatingengines and reciprocating driven devices aresubject to critical rotational speeds which maydamage the coupling and/or connected equip-ment
Elec
tric M
otor
w/
Stan
dard
Torq
ue
Elec
tric M
otor
w/
High
Torq
ue
Turb
ines
, Air
&Hy
drau
lic M
otor
s
Service Factors
Elec
tric M
otor
w/
Stan
dard
Torq
ue
Elec
tric M
otor
w/
High
Torq
ue
Turb
ines
, Air
&Hy
drau
lic M
otor
s
Service Factors
Elec
tric M
otor
w/
Stan
dard
Torq
ue
Elec
tric M
otor
w/
High
Torq
ue
Turb
ines
, Air
&Hy
drau
lic M
otor
s
Service Factors
Page 6.9Motion Technology
SHAFT COUPLINGS S-Flex Selection Data
Elastomer-in -Shear Type Couplings
The simple design of the S-Flex coupling ensures ease ofassembly and reliable performance. No special tools areneeded for installation or removal. S-Flex couplings canbe used in a wide variety of applications.
Features and Benefits:� Easy to Install.� Maintenance Free.� No Lubrication.� Dampens Vibration and Controls Shock.� Torsionally Soft.� Double Engagement.
The S-Flex coupling design is comprised of three parts.Two flanges with internal teeth engage an elastomeric flex-ible sleeve with external teeth. Each flange is attached tothe respective shaft of the driver and driven and torque istransmitted across the flanges through the sleeve. Mis-alignment and torsional shock loads are absorbed by sheardeflection in the sleeve. The shear characteristic of the S-Flex coupling is very well suited to absorb impact loads.
The S-Flex coupling from Lovejoy offers combinations offlanges and sleeves wihich can be assembled to suit yourspecific application. Thirteen sizes are available with torquecapabilities that range from 60 in-lb to 72,480 in-lb.
The S-Flex flanges are offered in four models which aremade from zinc die cast or cast iron. Sleeves are avail-able in EPDM rubbber, Neoprene, or Hytrel to address awide variety of application requirements.
Flange Types:Type J - Zinc Die Cast and Cast Iron, Bore Range... 3/8�-1-7/16�Type S - Cast Iron, Bore Range... 1/2�- 5-1/2�Type B - Cast Iron w/QD BushingType SC - Cast Iron SpacerType T - Cast Iron w/Taper-lock bushing
Hubs for Type SC Spacer Coupling:Type H - Powdered Metal or Cast Iron, Standard LengthType HS - Powdered Metal or Cast Iron, Short Length
Protection from misalignment, shock, and vibration:
PARALLEL:The S-Flex coupling ac-cepts up to 0.813mm ofparallel misalignmentwithout wear. The flex-ible coupling sleeve mini-mizes the radial loadsimposed on equipmentbearings, a problemcommonly associatedwith parallel misalign-ment.
ANGULAR:The flexing action of theelastomeric sleeve andthe locking feature of themating teeth allows theS-Flex coupling to effec-tively handle angularmisalignment up to 1°.
AXIAL:The S-Flex couplingscan be used in applica-tions which require a lim-ited amount of shaft en-float without transferringthrust loads to equip-ment bearings. Axialmovement of approxi-mately 3.175mm ac-cepted.
TORSIONAL:S-Flex couplings effec-tively dampen torsionalshock and vibration toprotect connectedequipment. The EPDMand Neoprene sleeveshave torsional wind-upflexibility of 15° at theirrated torque. Hytrel pro-vides 7° wind-up.
OD Part Nm Pilot Max Sizes 1 piece 1 piece 2 piece 1 piece 2 piece(mm) No. EPDM Bore Bore Inch Metric split split split
S Flex Couplings (shear at 4 times rated torque)
SHAFT COUPLINGS LovejoyS-Flex
Elastomer-in-Shear Type CouplingsThe simple design of the S-Flex coupling ensures ease of assembly and reliableperformance. No special tools are needed for installation or removal. S-Flexcouplings can be used in a wide variety of applications.
Features & Benefitsu Easy to installu Maintenance Freeu No Lubricationu Dampens Vibration and Controls Shocku Torsionally Soft
u Double Engagement
S.F. is the service factor listed on all LovejoyCatalogues and available from any BSCCentre.
Made in U.S.A.
Page 6.11Motion Technology
AgitatorsPure Liquids 1.0Liquids-Variable Density 1.0
BlowersCentrifugal 1.0Lobe 1.2
Can Filling Machines 1.0Car Dumpers 2.0Car Pullers, Intermittent Duty 1.5Compressors
Application Service Factors for Gear CouplingsValues contained in the table should be used as a general guide and are to be applied to smooth power sources such as electricmotors and steam turbines. For drives involving internal combustion engines add 1.0 to the values listed.
1.) These are maximum values. For reasonable life expectancy and low reactionary loads the misalignment should not exceed 3/4° for small couplings and 1/2° for larger couplings.2.) The maximum RPM of a Floating Shaft coupling set may be determined by the critical speed of the floating shaft itself.3.) Maximum RPM may be determined by dimensions of spacer.4.) Consult Lovejoy Engineering for Metric Bores over 500mm.
Standard C 7/8 1.25 31 284.7 8900 1°(DoubleEngagement) 12 12.50 353 284746.0 550 1/2° X XFlex-Rigid CFR 7/8 1.25 31 284.7 8900 1/2° X(SingleEngagement 6 6.63 186 42712.0 2000 1/4°Mill Motor CMM 7/8 1.25 31 284.7 8900 1°
1.) These are maximum values. For reasonable life expectancy and low reactionary loads, the misalignment should not exceed 3/4° for small couplings and 1/2° for larger couplings.2.) The maximum RPM of a Floating Shaft coupling set may be determined by the critical speed of the floating shaft itself.3.) Maximum RPM may be determined by dimensions of spacer.
Up to 1° angular misalignment permissible thru size 3-1/2.Up to 1/2° angular misalignment permissible for sizes 4 thru 12.
Gear Couplings - ContinuousSleeve
Size Max Bore Max Pieces Flex-flexMax RPM MM Nm ComponentsO.D.(inch)
Size Max Bore Max Pieces Flex-flexMax RPM MM Nm ComponentsF.D.(inch)
Standard Flex-Flex
Double Engagement (C)
SHAFT COUPLINGS LovejoyGear
Flex-Flex Double Engagement TypeFlex Rigid also available
Flanged Sleeve Series(Exposed Bolts Standard)
Continuous Sleeve Series
Gear Couplings -Flanged Sleeve
Made in U.S.A.
Page 6.14 Motion Technology
SHAFT COUPLINGS Service Factor OverviewGrid
Couplings Reduce Vibration, Absorb Shock andCompensate for Misalignment.
The Power of Torsional DampingThe Lovejoy G-Type Flexible Grid Coupling reduces vibra-tion by as much as 30%, and cushions shock loads tosafeguard your driving and driven equipment. The flex-ible nature of the spring-like grid absorbs impact energyby spreading it out over time, thus reducing the magni-tude of the peak loads. This is possible because of theprogressive contact that occurs between the curved pro-file of the hub teeth and the flexible grid. Therefore, as theload increases, more of the tooth comes into contact withthe grid, thus supplying superior protection and supremeperformance.
Lovejoy G-Type Flexible Grid Couplings are designed forversatility. Common hubs and grids are used within agiven size range for both horizontal and vertical split covermodels. Grid installation and replacement is a �snap� atonly a fraction of the complete coupling cost.
Benefits of the Grid Coupling include:� Our G2000 Series Tapered Grid coupling is fully interchangeable with industry standards.� Quick installation and easy maintenance reduces labor and downtime costs.� Torsionally flexible and resilient-reduces vibration, plus cushions shock and impact loads.� Versatile stock components can be used with either horizontal or vertical covers. Cover fasteners available in either Metric or Imperial sizes.� High tensile, shot-peened alloy steel grids and preci-
sion machined hubs ensure superior performance and long life.
Top Quality ManufacturingMade from a high tensile alloy steel, the grid spring iscarefully formed to shape, then hardened and temperedunder controlled conditions. Next, the grids are shot-peened, compressing the surface molecules and leavinga residually stressed surface. This process creates astronger surface in compression.
Any load applied on the coupling in operation must firstsurmount the compressive forces created by peeningbefore the tensile stress reaches the grid. This provides adramatic increase in rating over other coupling types, in-creases reserve strength for longer life and may permitselection of a smaller coupling, thus reducing cost.
The Lovejoy Grid spring/hub tooth arrangement has beenspecifically designed for optimum performance and su-preme reliability. Not only does the hub tooth profile per-mit progressive loading under torsional shock conditions,but unique root radii are incorporated to significantly im-prove the fatigue life of the teeth.
FULL SPACER DESIGN� Ideal for pump applications because drop-out section allows for pump servicing.
Misalignment Capacity:
Parallel: The movement of thegrid in the hub grooves accom-modates parallel misalignmentand still permits full functioningof the grid-groove action indamping out shock and vibra-tion.
Angular: Under angular mis-alignment, the grid-groove de-sign permits a rocking and slid-ing action of the grid and hubswithout any loss of powerthrough the resilient grid.
Axial: End float is permittedfor both driving and drivenmembers because the gridslides freely in the grooves.
General Service FactorsTypical applications for Electric Motor Typicalor Turbine Driven Equipment Service Factor
Constant Torque such as CentrifugalPumps, Blowers, and Compressors. 1.0Continuous Duty with some torquevariations including Printing Presses, 1.5Extruders, Forced Draft Fans.Light shock loads from BriquettingMachine, Rubber Calender, or 2.0Crane and HoistModerate shock loading as expectedfrom a Car Dumper, Reciprocating 2.5Feeder, or Vibrating Screen.Heavy Shock load with somenegative torques from Crushers, 3.0Manipulators and Braking Drum.Applications like Reciprocating ConsultCompressors with frequent torque your localreversals which do not necessarily BSC branchcause reverse rotations.
Complete service factor tablesare available in Lovejoys Grid CouplingCatalogue or from any BSC centre.
Part Number Examples of components: G2020HUBSOLID, G2020CVR/GRIDHO (Assy Horiz), G2020CVR/GRIDVE (Assy Vertical)..
HORIZONTAL SPLIT COVER VERTICAL SPLIT COVERCoupling OD Falk Morse/Brow Dodge Kop Flex OD Falk Morse/Brow Dodge Kop Flex Size mm Steel Flex Grid Flex Grid Lign Kop-Grid mm Steel Flex Grid Flex Grid Lign Kop-Grid
Max. Install. Misalignment Operating Misalignment Normal GapCoupling Torque Maximum Bore Max RPM x 1000 Parallel Angular Parallel Angular +10% Size Nm INCH MM Horizontal Vertical P (mm) X-Y (mm) P (mm) X-Y (mm) G (in.)
SHAFT COUPLINGS LovejoyGrid
Horizontal Split Vertical Split
HORIZONTALLY SPLIT COVER� Ideal for limited space.
VERTICALLY SPLIT COVER� Ideal for higher operating speeds.
� Manufactured from stamped steel.
Page 6.15aMotion Technology
CENTAFLEX -A 10-2500 3° to 6° *
Linear
Natural
Rubber
50° to 75°
Shore **
-45 to +90
CENTAFLEX -B
32-1000
45-1400
4°
Progressive
2.5°
Progressive
Polyrethan
90° Shore
Hytrel
98° Shore
-40 to +80
-50 to +150
CENTAFLEX -D 280-200003° to 5° *
Progressive
NBR
50° to 75°
Shore
-45 to +90
CENTAFLEX -E 600-200003° to 5° *
Progressive
NBR
75° Shore-45 to +90
CENTAFLEX -H 100-40000.2° to 0.3°
Linear
Hytrel
98° Shore-50 to +150
CENTAFLEX -X 10-12500.12°
LinearZytel -50 to +150
CENTAMAX 85-600005° to 16° *
Linear
Natural
Rubber
50° to 70°
Shore
-45 to +90
SHAFT COUPLINGS CentaCentaflex
Torsional angle ElasticNominal at nominal material & Allowable
SERIES FIGURE ELEMENT DIAGRAM torque torque & hardness Temperature(Nm) characteristic Shore A °C
* - depending on size
** - standard version; natural rubber; oil resistant, special NBR possible
7
7
7
7
7
7
7
Page 6.15bMotion Technology
Very well Not
suited suited
CentaCentaflexSHAFT COUPLINGS
Series G Series G Series G
7
7
7
Very versatile; in every aspect very flexible;free of backlash; adaptable; free of wear;numerous special designs, in particular,flexible universal joint shafts.
Flexible coupling to be mounted on new orexisting drive elements; ideal for applicationwith considerable misalignment, such as ondiesel-engines, especially for front-powertake-off; for generators, compressors,pumps, boats, etc. or for shaft to shaft driveswith electric motors.
Economical; simple, though of high quality;axial plug-in (blind fitting) jaw-coupling.Hubs of steel, bolted on claws of precisionpressure die-cast aluminium parts withevery smooth surface; standardizedconstruction principle allows numerousvariation in design; can be radiallyassembled; flexible element can beinstalled without disturbing the hubs.
To connect 2 shafts in all areas of machinedrives e.g. between electrical motors andgear boxes, compressors, pumps; alsoavailable with radially removable spacer forcentrifugal pumps (DIN 740) or as flexibleuniversal joint shaft of any length up to 6mhubs with finished bore or Centaloc splineclamping hub or taper bushes.
Robust, simple, plug-in jaw-coupling;numerous types of flanges; suitable forstandard (SAE or DIN) or non-standardflywheels; different lengths of hubs.
Diesel-generator and centrifugal pump sets,as well as similar drives with considerableinertia on the driven side. Type approvalfrom all important classification societies.
Robust, simple, plug-in jaw couplings withlarge permissible finished bores. Varioushub lengths. With type 3 radial exchange ofrubber element - without disturbing theshafts.
General industrial use for the purpose ofconnecting 2 shafts, or flange to shaft.
Robust, plug-in, torsionally stiff coupling,always for torsionally subcritical drives, oiland temperature resistant. Type 4 withintegrated flange-adaptor SAE 10", 11½"and 14" for diesel flywheels.
Drives for flange-mounted hydraulic pumpson diesel engines - especially withwear-resistant Centaloc spline clampinghub; the ideal and widely used reliablecoupling for hydrostatically dirvencosntruction machines. Available with awide variety of pump mounting adaptors fordiesel engines.
Torsionally very stiff, free of backlash,angularly flexible coupling; oil-andtemperature-resistant.
Exactly aligned drives for precise,torsionally stiff and backlash free with exact,angular transmission, e.g. step motors,tachometer drives, feeding drives.Torsionally stiff universal joint shaft.
Torsionally highly elastic, free of backlash,allround ventilation, compact, plug-in;standard flywheel dimensions according toSAE J620. Hubs can be varied; for splinedshafts with wear-free Centaloc -S-clamping.Non-standard flywheel mountings availableif required.
Torsionally difficult diesel engine drives,where the driven components haverelatively small inertias and are required torun over a wide speed range from low idlingrpm to full engine speed free fromdangerous resonances; e.g. hydrostaticpump dirves incorporating splitter gears,screw compressors, boat drives, heatpumps, generators. Type approval ofimportant classification societies.
Oil FLEXIBILITY Impor tant Features Important Areas of Application Resistant Axial Radial Angular
Page 6.15cMotion Technology
Standard Slip Fit - S
TYPE 1 and 1-S
TYPE 0 and 0-S
TYPE 3 and 3-S
TYPE 2 and 2-S
The rubber element for Customer�s
�own-designed� special applications.
Available in various Shore hardness grades and
materials.
Element with cylindrical hub for existing drive
elements, e.g. flywheels, pulleys, brake discs,
friction clutches, universal joints, freewheels,
gears.
Complete shaft couplings for all areas of
mechanical engineering. After removing the axial
screws, the coupled machines can be removed
radially, as with �three-part� couplings.
Flanged couplings for combustion engines and
many other applications. The simple adaptor
plate can be adapted to fit any standard and non-
standard flywheel or other component.
Centaflex Coupling Design Types
SHAFT COUPLINGS CentaCentaflex
Page 6.15dMotion Technology
SHAFT COUPLINGS CentaCentaflex
n Simple, compact, smooth-face
design.
n Low weight, low moment of
inertia.
n High performance, high-speed
range, large bores permitted,
ruptureproof.
n Large angle of twist with
progressive characteristic
curve (approx. 6° - 8° at
nominal torque).
n High elasticity and consider-
able flexibility in any direction
(radial, axial, angular) with low
counter forces on shafts and
bearings. The shafts do not,
therefore, have to be aligned
accurately.
n The action of the Centaflex
coupling is shock and vibra-
tion absorbing.
n The torque is transmitted
absolutely free from play,
uniformly, free from noise, and
electrically insulating.
n The coupling requires no
maintenance, the rubber parts
suffer no wear, providing long
useful life with no dirt pro-
duced by rubber particles.
n The rubber element is air
flushed all-round; the heat
generated is easily conducted
away and the rubber element
remains cool.
n The rubber element can easily
be fitted and dismantled
without the use of special tools
or tension bands.
n The coupling can be very
easily aligned, relying on line
of sight or with the aid of a
straight edge, without any
special templates or gauges.
n The elements can be disman-
tled transversely without any
axial displacement.
n By slackening the radial
screws, the drive can be easily
separated and rotated without
dismantling.
n No axial reaction forces are
imposed on shafts and bear-
ings due to the transmission of
torque.
n Rubber elements are available
in various shore hardness
grades. This permits variation
of the torsional stiffness within
wide limits an dits adaptation
to the vibrational requirements
of each drive system.
n The rubber elements are
available in various materials:
Standard: Natural Rubber
Special Materials: Perbunan,
Neoprene, etc.
CENTAFLEX(THE COUPLING WITH THE 5-WAY-FLEX)
Every good elastic coupling has 4-way flexibility:
1. Torsional elasticity
2. Radial flexibility
3. Axial flexibility
4. Angular flexibility
In addition, the Centaflex is uniquely flexible in application, i.e. capable of modification and adaption;
Centaflex therefore has 5-way flexibility.
Characteristics and Advantages
Page 6.16 Motion Technology
Torque StandardNormal Max Bore O D Coupling Slip Fit
Size Nm MM * MM Pieces Components Description Element OS
Centa A Series
1 10 19 56 1 CFA001O STD ELEMENT CFA001OS2 CFA001BS BOLT SET CFA001SBS1 CFA001CH1 CYL HUB1 CFA001FH2 FLNGE HUB
2 20 26 85 1 CFA002O STD ELEMENT CFA002OS2 CFA002BS BOLT SET CFA002SBS1 CFA002CH1 CYL HUB1 CFA002FH2 FLNGE HUB
4 50 30 100 1 CFA004O STD ELEMENT CFA004OS2 CFA004BS BOLT SET CFA004SBS1 CFA004CH1 CYL HUB1 CFA004FH2 FLNGE HUB
8 100 38 120 1 CFA008O STD ELEMENT CFA008OS2 CFA008BS BOLT SET CFA008SBS1 CFA008CH1 CYL HUB1 CFA008FH2 FLNGE HUB
12 140 38 122 1 CFA012O STD ELEMENT CFA012OS2 CFA012BS BOLT SET CFA012SBS1 CFA012CH1 CYL HUB1 CFA012FH2 FLNGE HUB
16 200 48 150 1 CFA016O STD ELEMENT CFA016OS2 CFA016BS BOLT SET CFA016SBS1 CFA016CH1 CYL HUB1 CFA016FH2 FLNGE HUB
22 275 48 150 1 CFA022O STD ELEMENT CFA022OS2 CFA022BS BOLT SET CFA022SBS1 CFA022CH1 CYL HUB1 CFA022FH2 FLNGE HUB
25 315 55 170 1 CFA025O STD ELEMENT CFA025OS2 CFA025BS BOLT SET CFA025SBS1 CFA025CH1 CYL HUB1 CFA025FH2 FLNGE HUB
28 420 55 170 1 CFA028O STD ELEMENT CFA028OS2 CFA028BS BOLT SET CFA028SBS1 CFA028CH1 CYL HUB1 CFA028FH2 FLNGE HUB
30 500 65 200 1 CFA030O STD ELEMENT CFA030OS2 CFA030BS BOLT SET CFA030SBS1 CFA030CH1 CYL HUB1 CFA030FH2 FLNGE HUB
50 700 65 200 1 CFA050O STD ELEMENT CFA050OS2 CFA050BS BOLT SET CFA050SBS1 CFA050CH1 CYL HUB1 CFA050FH2 FLNGE HUB
Centaflex ASHAFT COUPLINGS CentaCenta A
The Centaflex-A is a torsional coupling of medium dynamic torsionalstiffness. Specific design benefits include:u Simplicity, Compactnessu Elements available in other materialsu No maintenance requiredu Low weight, low rotating inertiau Large angle of twist at nominal torque, 3-6°u High elasticity and flexibility in any direction - angular, radially or axiallyu Electrically insulates driving from driven machineryu The rubber element is ventilated from all sidesu Other than a torque wrench, no special tools required for
installationu Driver can be easily separated from driven machinery for rotation during maintenance by removing radial boltsu Torque transmission causes no axial reaction forcesu Elements available in other materials
Made in Germany* Max. Bore for Cylindrical Hub. Flanged Hub is greater.
The patented Deltaflex series of couplings offer maximum misalign-ment capabilities with negligible reactionary load, for longer equip-ment life. This all-metal flex-link coupling requires no lubrication orother maintenance. Typical applications include: compressors,pumps, fans, positioning devices, indexing tables, mixers, papermillroll drives, drive line shafts, turbine drives, wind tunnels, cooling tow-ers, and single bearing generator drives.
SHAFT COUPLINGS CentaLovejoyCenta A - Deltaflex
Made in U.S.A.
Torque StandardNormal Max Bore O D Coupling Slip Fit
Size Nm MM MM Pieces Components Description Element OS
Centa A Series - Cont.
80 900 65 205 1 CFA080O STD ELEMENT CFA080OS2 CFA080BS BOLT SET CFA080SBS1 CFA080CH1 CYL HUB1 CFA080FH2 FLNGE HUB
90 1100 85 260 1 CFA090O STD ELEMENT CFA090OS2 CFA090BS BOLT SET CFA090SBS1 CFA090CH1 CYL HUB1 CFA090FH2 FLNGE HUB
140 1700 85 260 1 CFA140O STD ELEMENT CFA140OS2 CFA140BS BOLT SET CFA140SBS1 CFA140CH1 CYL HUB1 CFA140FH2 FLNGE HUB
250 3000 115 340 1 CFA250O STD ELEMENT CFA250OS2 CFA250BS BOLT SET CFA250SBS1 CFA250CH1 CYL HUB1 CFA250FH2 FLNGE HUB
Made in Germany
Delta Flex Flex Link
Other Centa Couplings
Page 6.18 Motion Technology
The Lovejoy Miniature flexible couplings have provento be particularly suitable in all light duty and precisionapplications. The design objective of a Miniature flexiblecoupling is to transmit torque loads without permanentdistortion or damage and without imposing undue bend-ing or radial loads upon the driver or driven components.The specific characteristics of each application determinethe proper flexible coupling to use.
Characteristics such as torsional stiffness, absorption ofvibration, isolation, backlash, tolerance to chemicals andcorrosion and uniform velocity should all be considered inthe coupling selection. Typical operational requirementsfor Miniature flexible couplings include light duty, torqueratings less than 50 in-lbs., torsional rigidity, low inertia,constant velocity, low radial stiffness, zero backlash, cor-rosion resistance, and the capability of cyclic (repeatedstart/stop/reverse) activity.
Applications that normally use Miniature flexible couplingshave a fractional electrical motor driver. Examples of thesetypes of applications include shaft encoders, resolvers, allforms of servo devices, linear and ball screw actuators,robots, step motors, light duty pumps and metering de-vices, plotters, positioning tables, computers, and radar.
Lovejoy offers four distinct coupling designs; Beam,Oldham, Mini Soft, and Jaw. These designs provide awide range of alternatives in addressing fractional electricmotor applications.
Beam CouplingThe Lovejoy Beam Miniature cou-pling is formed from one piece ofaluminum rod. After sizing, boringand installing the clamping mecha-nism or set screw, the final step isto cut a spiral flexure or �coil� inthe coupling. The result is truly aflexible coupling that transmitstorque through the flexure while accommodating angular,parallel and axial misalignment.The Beam coupling provides zero backlash, high tor-sional stiffness, and high speed capability while being
Lovejoy
very lightweight. Its one piece construction makes in-stallation simple and the construction provides for heatand chemical resistance in environments that would beharmful to elastomeric couplings.
Oldham CouplingThe Lovejoy Oldham coupling is aprecision engineered, torsionallystiff, three part coupling suitablefor a great many applicationsranging from incremental controlof fluid valves to highly dynamicdrives in a closed loop servo sys-tem. It accommodates misalign-ment mechanically through a floating disc that engagestenons machined out of the hubs. As the coupling ro-tates, the disc aligns with each hub alternately to anextent demanded by the alignment error. The principleof operation should not be confused with that of theJaw coupling which accommodates misalignmentthrough compression of an elastomer.
Mini Soft CouplingThe Mini Soft Miniature coupling fromLovejoy provides protection from mis-alignment, vibration, and shock loads.The simple design of the couplingensures ease of assembly, installationand reliable performance. No specialtools are needed for installation orremoval. No lubrication is needed andonce installed and aligned correctly,no maintenance is required.
The Mini Soft Miniature coupling design is comprisedof three pads. Two hubs with internal teeth that engagean elastomeric flexible center with external teeth. Eachhub is attached to the respective shaft of the driver anddriven and torque is transmitted across the hubsthrough the center. Misalignment and torsional shockloads are absorbed by shear deflection in the centerelement. The shear characteristic of the coupling is verywell suited to absorb impact.
Jaw Type CouplingThe interlocking jaws of the three partLovejoy Miniature Jaw coupling pro-vide positive engagement resultingin great strength because of the largearea of contact of the elastomer withthe jaws.This Miniature coupling pro-vides �fail safe� operations and is theonly coupling that will continue torun, even if the elastomer center fails,through the metal to metal jaw contact that will con-tinue to transmit torque.
Centamax - Torsionally very soft typeTorsionally very soft coupling with unique elementdesign. Moulded teeth along the outside diameter ofthe rubber element engage with an internally toothedaluminium ring. Ideal applications include: hydrostaticpump drives incorporating splitter gears, screw com-pressors, boat drives, heat pumps, gen-sets, andmany others. Available in nine sizes 36 thru 4713 KW.Operates in temperature range -9° to +80° C. Usedin Earthmoving equipment.
Centa D Series - High torque rubber block typecouplings for diesel enginesJaw-type design mounted directly to SAE standardflywheels for Diesel driven generators and similar driveapplications. Available in nine sizes 52 thru 3760 KW.Operates in temperature range -9° to +80° C.
H Series Type 4 - Engine flywheel mountingtypeThis thin profile model consists of a cylindrical hubfor shaft mounting, and a high performance Hytrel
element mounted to a cast alloy flywheel adaptorplate. The ideal solution for torsional resonance oroperation in hot, oily environments, such as confinedengine housing/pump or compressor applications.Used in Earthmoving equipment.
Series A Type 3 - Engine flywheel mountingtypeSimilar to a Type 1 with the addition of an engine fly-wheel mounting plate. Various standard flexible ele-ment materials are available for specific torsional,misalignment and environmental requirements. Stand-ard SAE as well as non standard mounting plates areavailable.
Available for most S.A.E. standard Flywheel(also Ford & Perkins).
Spline hubs with Centaloc available for mosthydraulic pumps.
The figures in heavier type are for standard motor speeds. All these power ratings are calculated at constant torque.For speeds below 100 rev/ min and intermediate speeds use nominal torque ratings.
1. Service FactorDetermine the required service factor from Table 1 below.
2. Design PowerMultiply tne normal running power by the service factor. Thisgives Design Power which is used as a basis for selecting thecoupling.
3. Coupling SizeRefer to Table 2 and from the appropriate speed read acrossuntil a power greater than that required is found. The size ofTyre-flex coupling required is given in that column.
4. Bore SizeCheck from Table 3 that selected coupling can accomodaterequired bores.
Table 2: Power Rating ( kW at Specific Speeds)
CLASS 1Agitators, Brewing machinery, Centrifugal compressors and pumps, Belt conveyors,Dynamometers, Lineshafts, Fans up to 7.5kW, Blowers and exhausters (exceptpositive displacement), Generators.CLASS2*Clay working machinery, General machine tools, Paper mill beaters and winders,Rotary pumps, Rubber extruders, Rotary screens, Textile machinery, Marinepropellers, and Fans over 7.5kW.CLASS 3*Bucket elevators, Cooling tower fans, Piston compressors and pumps, Foundrymachinery, Metal presses, Paper mill calendars, Hammer mills, Presses and pulpgrinders, Rubber calendars, Pulverisers and Positive displacement blowers.CLASS 4*Reciprocating conveyors, Gyratory crushers, Mills (ball, pebble and rod), Rubbermachinery (Banbury mixers and mills) and Vibratory screens.
Table 1: Service Factors
SPECIAL CLASSES
For applications where substantial shock, vibration and torque fluctuationsoccur and for reciprocating machines e.g. internal combustion engines,piston pumps and compressors, refer to BSC Engineering with full machiningdetails for analysis.
Alternative stiffness tyre-flex sizes F70 to F250 can be supplied depending on the nature of the application.Maximum torque figures should be regarded as short duration overload ratings for use in such circumstances as direct-on-line starting.All flexible tyre couplings have an angular misalignment capacity of 4°.
COUPLINGSTyre Couplings Selection Procedure
Table 3: Physical Characteristics ( Max Speed, Alignment, End Float and Torque)
BSC Other Bush Torque Type F/H Type B Max Par. End Mass*/
Part Mfg Type Size Max Bore Nm L E J L E A C D F G M Speed Mis. Float Couplg
Number Number mm Inch Normal Max rpm mm mm kg
B (Pilot Bore), F (Tapered Bush Flange), H (Hub Entry), FH (Reversible)SIZES F40 - 60 (F & H) SIZES F70 - 220 (F, H & FH) F40 - F120 (B) F140 - F250 (B)
All flexible tyres have an angular misalignment capacity up to 4°.
G amount by which clamping screws need to be withdrawn to release tyre.J wrench clearance to allow for tightening and loosening the bush on the shaft and
the clamp ring screws on sizes F40, F50 and F60. The use of a shortened wrenchwill allow this dimension to be reduced.
M half the distance between flanges. Shaft ends, although normally located twice Mapart, can project beyond the flanges. In this event allow sufficient spacebetween shaft ends for end float and misalignment.
* Mass figures are for single flange with mid-range bore and includeclamping ring, screws and washers and half tyre.
Tyre Couplings
Complete Coupling Number Example
2-F70FH - Reversible Tapered BushFlanged Entry
1-F70STYRE - Synthetic Tyre
Dimensions in millimetres unless otherwise stated.
COUPLINGSComprising a tyre coupling (size F40 - F140) complete with a forge spacer flangedesigned fo ruse on applications where it is an advantage to be able to moveeither shaft axially without disturbing the driving or driven machine; e.g.centrifugal pump rotors. Tyre spacer couplings are primarily for the standarddistance between the shaft end dimensions 100, 140 and 180 mm.
SELECTION PROCEDURE:
1. Select a suitable size of Tyre-flex coupling using the procedure and data onpage 6.20E of this Section of the Manual.
2. Refer size column in Table A and locate the size of coupling selected.3. Read across this size until required distance between shaft ends (DBSE) can
be accommodated.4. The size of the spacer coupling is given at head of column.5. Refer respective coupling dimensional table, Table B, to check that the selected
spacer/coupling combination can accommodate the machine shaft size.
Notes:* Non-standard spacers are available on request.
Nom Spacer Spacer Tyre-flexSpacer DBSE Size Flange Bush Max Bore Bush Max Bore A B C D E F G H J K L M S T
F = Flange for internal mounting of bushH = Flange for external mounting of bush
Size Bush Boresof Size Min Max D dn a b c L1 L2
1)
Coupling
Bush Type
F-Flange H-Flange Total Length
Torque Max Moment of Weight ofBush Nm Speed Inertia Coupling
Type No Nom Max RPM Bush Std Bust Std
Technical Data
Dimensions in millimetres.
Page 6.21Motion Technology
LOJ TYPE - economical handoperated universal joints
Offset pin design for economical useon hand operated, low torque driveswith operating angles up to 45°.
Universal Joints
D TYPE - standard industrial uni-versal joint
Pin and block design is consideredstandard for industrial type universaljoints. The special tapered shape ofthe yokes provide exceptional strengthwhile allowing full free movement of thejoint. Ideal for applications with oper-ating angles up to 25° and speeds upto 1750 rpm. * As with all the basicLovejoy universal joint types shown inthis catalogue, they are available withround, hex, splined or keyway bores.* Operation of all universal joints is determined by
the angle/speed combinations of the application.
Consult Lovejoy Engineering for specific limitationsand recommendations.
U-joint life is extended by lubrication. Use boots toretain lubricant.
CONVERSIONSKW = 0.746 x H.P.mm = 25.4 x inches.Nm = .113 x In. Lbs.Kgm² = .002932 x In.Lbs²Nm = 1.356 x Ft. Lbs.Nm = 9.806 x Kgm.°C = (°F - 32) x 5 / 9N = 4.45 x Lbf.Nm = 9550 x KW
RPM
D TypeUniversal Joint Size Max. Overall Bore Diameter Static Breaking
* These sizes also available from stock in D-type Stainless Steel and Needle Bearing type.See chart below for breaking torques of Needle Bearing type. All other dimensionalinformation for stainless steel and needle bearing types is the same as D types.
Page 6.21aMotion Technology
COUPLINGS Universal Joints Overview
Pin & Block and Needle Bearing Industrial U-Joints
Features and Benefits
The industrial universal joint product line is well established and provides you with a wide range ofstandard and specialised products. The shape of the yoke is a special feature which results inexceptionally high strength, yet allows full, free movement of the joint. This accounts for the highhorsepower capacity at high speeds.
n Industry Standardn Standard Steel and Needle
Bearing Available
n 15 Sizesn Pin and Block Designn Boot Retaining Grooves
Standard
D Type
This standard industrial-type universal joint with pin and block design isideal for applications up to 25° and speeds to 1750 RPM.
HD Type
A high quality universal joint made to exacting tolerances, the HD willnormally provide twice the life of a standard industrial-type universal joint.
D303 StainlessD type universal joints are available in stainless steel when contact with acorrosive atmosphere or sanitation requirements are a factor.
Needle Bearing Type
Designed with high quality, pre-lubricated, and sealed needle bearings,this universal joint provides the reliability necessary for speeds up to 6000RPM and angles up to 25°.
DD and DDX TypesDesigned with two Lovejoy standard D type universal joints and a centerconnecting shaft, the DD and DDX are tailored to your specific applicationrequirements.
Multi-Spindle TypeMulti-spindle universal joint assemblies consist of two quality HD universaljoints mounted at opposite ends of a spring loaded shaft. They are usedto connect drill head drives to the drill spindles.
Universal Joint BootsThe life of a universal joint can be extended substantially if booted. Wearareas of the universal joint are protected from dirt and contaminants, whilelubrication is retained.
LOJ and JR-4These economical universal joints with offset pin design are ideal for useon hand operated, low torque drives. They are capable of operating anglesto 45°.
Centrifugal 1.25Gear, Rotary, or Vane 1.25Reciprocating 1 cyl. single or double acting 2.00 2 cyl. single acting 2.00 2 cyl. double acting 1.75 3 or more cyl. 1.50
Rubber MachineryMixer 2.50Rubber Calender 2.00
ScreensAir Washing 1.25Rotary, Stone or Gravel 1.50Vibrating 2.50Water 1.25Grizzly 2.00
Shredders 1.50Steering Gear not recommendedStokers 1.25Textile Machinery
DredgesCable Reels 2.00Conveyors 1.50Cutter Head Drives 2.50Maneuvering Winches 1.50Pumps 1.50
EvaporatorsConsult Factory 1.25
FansCentrifugal 1.25Cooling Towers 2.00Forced Draft 1.50Induced Draft w/o Damper Control 2.00Propeller 1.50Induced Draft w/ Damper Control 1.25
COUPLINGS Universal Joints Lovejoy
Application Service Factors for Universal JointsValues contained in the table should be used as a general guide. For above average shock loads or start/stop conditions of not morethan once per hour, add .5 to the table value. Universal joints are not recommended for internal combustion engine applications. Forsevere shock loads or reversing loads, or start/stop conditions of more than once per hour, add 1 to the table value.
Page 6.22 Motion Technology
D TYPE STAINLESS -corrosion resistantuniversal joints
D type universal joints are also available in stain-less steel for use when contact with corrosivechemicals, exposure to corrosive atmosphere, orsanitation requirements are a factor. Stainlesssteel universal joints are available from stock insizes 4, 6, 8, 10, and 12. They carry lower torquerating due to strength and wear quality of thepin. Contact BSC with your specific questions orneeds.
DD & DDX TYPE - standarddrive line assembly
Available on request
Designed with Lovejoy�s standard quality D typeuniversal joints with a centre connecting shaftthat is tailored to your specific application require-ments. This configuration is typical of industrialapplications of universal joints to compensatefor parallel misalignment and shaft separation.Contact BSC with your specific needs.
COUPLINGS Universal Joints
NEEDLE BEARING TYPE
Designed with high quality, pre-lubricated andsealed needle bearings. Special thrust pads takehigh peak loads while ensuring long continuousservice. Needle bearing universal joints providevery low backlash and precision control requiredon robotics, instrumentation, and control equip-ment applications. This design also provides thereliability necessary for speeds up to 6000 rpmand operating angles up to 25°.Available in stock sizes: 4, 6, 8, 10 and 12.
All dimensions in mm.Maximum operating angle 25°, Max RPM 6000.
UNIVERSAL JOINT BOOTSThe life of a universal joint can be extended sub-stantially if booted. Wear areas of the universaljoint are protected from dirt and contaminants,while lubrication is retained. Lovejoy on-site re-placeable boots ensure proper lubrication for upto 5 times longer universal joint life. Installationand replacement is fast and easy. Your machinecan be back in operation in minutes. Lovejoyuniversal joints: D, D-SS, DD, DDX, HD, NB andLOJ come pre-grooved to accommodate on-sitereplaceable boots.
Torque Limiter Size No of Disc Springs Coupling Type
The Torque Limiter is a protective device that limits the torque transmitted in a drive system byslipping when the torque demand exceeds a preset value as a result of shock loads, overloads,or machine jams. It automatically reengages when the overload is removed. No resetting isrequired. Torque Limiters prevent machine damage and eliminate costly downtime.
Torque Limiters utilize spring loaded friction surfaces for their operation and slip torque is presetby adjustment of the spring force using the adjustment nut or bolts.
Torque Limiters can be used with a sprocket, gear, sheave, or flange plate as the center member damaged between two friction facings.
The Torque Limiter ratings are realistic and consistent with optimum spring loads and face pressures that permit longer slip time, maintain re-engagement at preset torque, and providelong lasting protection. This is an important advantage over the shear-pin mechanism whichserves only as a one-shot remedy.
TORQUE LIMITERSPrevent Machine Damage and Eliminate Costly Downtime
_1
TL50_2
_1
TL65_2
_1
TL89_2
5 Single Nut Adjustment
5 Lock Washer to prevent the nut from loosening
_1
TL50_2 C thru
The Torque Limiter Couplingcombines overload slip protec-tion with the ability to coupledriving and driven shafts. It is anassembly consisting of a TorqueLimiter and Roller ChainCoupling. This construction pro-vides a dependable and easy-to-assemble flexible coupling.
_6
TL20_12
_16
TL10_24
_10
TL14_15
_6
TL20_12
5 5 to 8 Bolt Adjustment
5 Each spring backed up by one adjustment bolt
5 Each bolt has a hole through its head for a wire to prevent loosening
_1
TL127_2
_1
TL178_2
5 Three Bolt Adjustment
5 Torque preset by the three bolts (an adjustment nut to fix a pilot plate in place)
Name of Parts1 Hub2 Friction Facing3 Bushing4 Pressure Plate5 Disc Spring6 Pilot Plate7 Adjustment Nut8 Adjustment Bolt9 Set Screw10 Lock Washer
COUPLINGS
Page 6.24b
Torque LimitersDimensions and Capacity
BSC
Part
Number
Other Mftr
Part
Number
Torque
Range
(Nm)x9.807
Plain
Bore
Max
Bore
Bush
LengthD D
HL R T t
S
(max)A C
Adjust
Nut
Adjust
Bolt
Set
Screw
TL50-1 TL200-1 0.3 ~ 1 -0.024 + 0.03
TL50-2 TL200-2 0.7 ~ 2 -0.049 0
TL65-1 TL250-1 0.7 ~ 2.8 -0.010 + 0.05
TL65-2 TL250-2 1.4 ~ 5.5 -0.045 0
TL89-1 TL350-1 2.0 ~ 7.6 -0.025 + 0.05
TL89-2 TL350-2 3.5 ~ 15.2 -0.065 0
TL127-1 TL500-1 4.8 ~ 21.4 -0.05 + 0.05
TL127-2 TL500-2 9 ~ 42.9 -0.10 0
TL178-1 TL700-1 11.8 ~ 58.1 -0.05 + 0.05
TL178-2 TL700-2 22.8 ~ 110.6 -0.125 0
Bore for
Centre
Member
O.D. of
Bush
M10M10
P1.2595 98
M65
P1.5
M8
P1.0M8
3.8
6.0
4.5
6.5
4.5
6.5
6.5
9.5
9.5
12.58 -
M95
P1.524 7.7 3.2 29105 178
3.2 16 7 -65 76 22 5.7
M42
P1.5- M63.2 16 6 6342 62 19 4.5
M35
P1.5- M53.2 9 4 5035 48 16 4.5
M24
P1.0- -2.5 7 - 3824 29 6.5 2.6
49 89
74 127
30 50
41 65
30
41
30
14
22
25
42
64
7
105
10
17
20 74
49
BSC
Part
Number
Other Mftr
Part
Number
Torque
Range
(Nm)x9.807
Plain
Bore
(H10)
Max
Bore
Bush
LengthD D
HL R T
1T
2t
S
(max)C
Adjust
Bolt
TL10-16 TL10-16 4 ~ 130
TL10-24 TL10-24 60 ~ 190
TL14-10 TL14-10 90 ~ 272
TL14-15 TL14-15 200 ~ 400
TL20-6 TL20-6 250 ~ 500
TL20-12 TL20-12 470 ~ 950
24 19M18 P1.5
8 pcs.
31 36M32 P1.5
6 pcs.36 15 18 4.0
O.D. of
Bush
Bore for
Centre
Member
30
40
50
72
100
130
12.5
15.5
19.5
15.5
19.5
23.5
15.5
19.5
23.5
135
183
226 508
+ 0.07
0
+ 0.07
0
+ 0.07
0
27145 150 31 13M26 P1.5
5 pcs.
100 115 23 15 - 4.0
13 4.0 29
185 175
-0.085
-0.125
-0.07
-0.12
-0.07
-0.12
135
135
135
254
356
Name of Parts1 Hub2 Friction Facing3 Bushing4 Plate A5 Plate B6 Disc Spring7 Pressure Plate8 Pilot Plate9 Adjustment Bolt10 Snap Ring11 Spirolox12 Spring Pin
TL50, TL65, TL89 TL127, TL178
_1 _1Dimensions and Capacity for TL50_2 through TL178_2
_16 _6Dimensions and Capacity for TL10_24 through TL20_12
TL10 TL14, TL20
COUPLINGS
Page 6.24c
Torque LimitersCoupling Dimension and Capacity
Coupling
HalfTL Half
Coupling
HalfTL Half
TL50-1C TL200-1C 0.3 ~ 1
TL50-2C TL200-2C 0.7 ~ 2.0
TL65-1C TL250-1C 0.7 ~ 2.8
TL65-2C TL250-2C 1.4 ~ 5.5
TL89-1C TL350-1C 2.0 ~ 7.6
TL89-2C TL350-2C 3.5 ~ 15.2
TL127-1C TL500-1C 4.8 ~ 21.4
TL127-2C TL500-2C 9.0 ~ 42.9
TL178-1C TL700-1C 11.8 ~ 58.1
TL178-2C TL700-2C 22.8 ~ 110.6
TL10-16C TL10-16C 40 ~ 130
TL10-24C TL10-24C 60 ~ 190
TL14-10C TL14-10C 90 ~ 272
TL14-15C TL14-15C 200 ~ 400
TL20-6C TL20-6C 250 ~ 500
TL20-12C TL20-12C 470 ~ 950120 175 30.1
71 115 26.2
66 98 15.3
189
235
62
L R1
11.6
80 150 30.1
Other Mftr
Part
Number
120
168
9.7
40 76
Plain Bore Max BoreTorque
Range
(Nm)x9.807
Max
Running
Speed
S Sprocket D DH
76
24 29 7.5
25 48 7.4
R2
137
167
237
37103
300130 160-36T 631
72
100
80-28T
140-22T
160-26T
137
188
355
470
64 251
56
72
105
150
25
42
40-16T 7614
40-22T
50-24T
60-28T
55
40
50
118
150
200
140
38
43
400
300
23
33
65
30
30
90
95
500
13
18
17
20
38
800 45
22 102
50
1000
8
13
7
10
BSC
Part
Number
1200 31
_1 _6Dimensions and Capacity for TL50_2C through TL20_12C
TL50-C TL65-C, TL89-C TL127-C, TL178-C
TL10-C TL14-C TL20-C
NOTE: When the Torque Limiter coupling is run at max. running speed, the chain and sprocket should be lubricated with Molykote 400ml MKL or grease and covered. Contact your local BSC branch when a higher speed is required.
COUPLINGS
Page 6.24d
SprocketMin
Teeth
BushLength(mm)
SprocketMin
Teeth
BushLength(mm)
SprocketMin
Teeth
BushLength(mm)
SprocketMin
Teeth
BushLength(mm)
SprocketMin
Teeth
BushLength(mm)
SprocketMin
Teeth
BushLength(mm)
SprocketMin
Teeth
BushLength(mm)
SprocketMin
Teeth
BushLength(mm)
SprocketMin
Teeth
BushLength(mm)
TL50 TL200 30+ 0.03 0
20 3.8 16 6
TL65 TL250 41+ 0.05 0
20 4.5 17 6.5
TL89 TL350 49+ 0.05 0
26 4.5 21 6.5 18 9.5 15 9.5
TL127 TL500 74+ 0.05 0
29 6.5 25 9.5 19 9.5
TL178 TL700 105+ 0.05 0
33 9.5 26 9.5 21 12.5 18 12.5
TL10 TL10 135+ 0.07 0
29 12.5 24 15.5 22 19.5
TL14 TL14 183+ 0.07 0
39 15.5 33 15.5 29 19.5 26 23.5
TL20 TL20 226+ 0.07 0
54 15.5 46 15.5 40 19.5 35 23.5
Other MftrPart
Number
3/8" - #35 1/2" - #40BSCPart
Number
Minimum Sprocket Teeth and Bushing Length
Bore ofCenter
Member(mm)
1-1/2" - #120 1-3/4" - #140 2" - #160Sprocket Pitch and Number of Teeth
5/8" - #50 3/4" - #60 1" - #80 1-1/4" - #100
Torque LimitersSelection & Center Member
SELECTION
CENTER MEMBER
1. Determine the required slip torque from the loading conditions or from the design strength ofthe machine. If the loading conditions of the machine are unknown, set the required sliptorque of the torque limiter to 1.52 times the torque that the motor produces on the shaftwhere the torque limiter is mounted.
2. Select a torque limiter which has enough torque range and bore range.
3. Determine the proper bushing length from the thickness of the center member to be insertedbetween the friction facings.
Always choose the largest bushing which does not exceed the width of the center member.Maximum thickness of the center member is shown as “S max.” in the dimension table.
1. The center member should be machined on its rubbing surface to obtain the rated torque andbe flat, parallel, square with bore, and free from rust, scale and oil. Surface finish recom-mended is 3S~6S (63 microinches finish).
If the center member is not in accordance with these specifications, the slip torque will beerratic.
2. Bore of the center member to be machined is shown in the table below. Also, minimum num-ber of sprocket teeth to be used and bushing length to be chosen are listed in the table.
COUPLINGS
Page 6.24e
TORQUE SETTINGTorque setting of the torque limiter is achieved by tightening or loosening the adjustment boltsand/or the adjustment nut. For torque adjustment of TL50 through TL89, an adjustment nut isprovided, and for TL127 through TL20, adjustment bolts are provided. The torque setting can be made after mounting the torque liminter on the shaft. The procedure is as follows:
For TL50 through TL89:
First, rotate the adjustment nut tightly by hand so that the disk spring fits the plate. Then tenta-tively tighten the nut by 60° with a wrench.
For TL127 through TL20:
First, rotate the nut for fixing the disk spring to the plate, and then tighten each adjustment boltby about 60 degrees.
Then, if the torque limiter slips under normal loading conditions, tighten the nut (for TL50~TL82)or the bolts (for TL127~TL20) gradually until the torque limiter stops slipping. Always tighten (orloosen) the bolts equally. Try this adjustment several times to find the proper torque setting forthe machine. For your guidance, the chart on the next page shows the relation between theeffective rotated angle and preset torque.
For precise torque setting, run-in of the torque limiter is recommended, for example, 500 revolu-tions at 50~60 rpm with a rotated angle of 45° of the adjustment nut or the bolts.
Torque LimitersTorque Setting
ROTATING ANGLE AND SETTING TORQUE
TL50-1TL50-2
TL65-1
TL65-2
TL89-1
TL89-2
TL127-1
TL127-2
TL178-1
TL178-2 TL20-12
TL20-6
TL14-15
TL14-10
TL10-24 TL10-16
TL50, TL65, TL89 TL127, TL178 TL10, TL14, TL20
Page 6.25Motion Technology
COUPLINGS Installation & Maintenance Tips
in their final positions.
2. Check parallel alignment by placing a straight edge acrossthe two hubs and measuring the maximum offset at vari-ous points around the periphery of the hubs without rotat-ing the coupling. If the maximum offset exceeds the paral-lel value in Table 3, realign the shafts.
3. Check angular alignment with a micrometer or caliper.Measure the “X” dimension from one hub to the other atintervals around the hubs. Determine the maximum andthe minimum dimensions without rotating the coupling. Thedifference of these two measurements must be less thanthe angular value in Table 3. If a correction is necessary,recheck the parallel alignment.
4. Position the spacer between the two hubs with collars looseon the hub or spacer. Install the snap-wrap spiders andfasten collars with cap screws. Proceed to Step 3.
2b. For RRC Type - Style 4.
1. Slide one adaptor hub onto each shaft, using keys whererequired. Position the hubs on the shafts to achieve a spacergap as in Figure 5. It is usally best to have an equal lengthof shaft extending into each hub. Tighten both hubs withthe set screw torque from Table 1.
2. Install the spacer section between the two hubs. The spacersection includes two jaw rings, the cushions, and a collar.Fasten the spacer section to the adaptor hubs with the axialmounting screws and torque them to 68-76 ft-lbs.
3. Slide collar off jaw ring and set on the adaptor hub. Somecushions at the bottom side of the coupling can fall outand may be set aside while checking shaft alignment.
4. Check parallel alignment by placing a straight edge acrossthe two hubs and measuring the maximum offset at vari-ous points around the periphery of the hubs without rotat-ing the coupling. If the maximum offset exceeds the paral-lel value in Table 3, realign the shafts.
5. Check angular alignment with a micrometer or caliper.Measure the “X” dimension from one hub to the other atintervals around the hubs. Determine the maximum andthe minimum dimensions without rotating the coupling.
The difference of these two measurements must be lessthan the angular value in Table 3. If a correction is neces-sary, recheck the parallel alignment.
6. Reinstall the cushions and fasten the collar with cap screws.Proceed to Step 3.
C. LC Type2c. For LC Type - Styles 1 and 2
1. Slide one hub onto each shaft using the keys where re-quired. Position the hubs on the shafts to approximatelyachieve the “G” dimension shown in Table 2.
It is usually best to have an equal length of shaft extendinginto each hub. Tighten both hubs in their final positionswith set screw torque from Table 1. Slide the collar to theedge of the hub and do not install the spider at this time.
2. Check parallel alignment by placing a straight edge acrossthe two hubs and measuring the maximum offset at vari-
A. L, AL, C and H Types
Jaw hubs and elastomers come in many sizes and types. First,determine the size and type of components being used. Re-move all components from their boxes and loosely assemblethe coupling on any convenient surface. Also check maximumRPM values in Table 2 against operating speed.
1. Inspect all coupling components and remove any protec-tive coatings or lubricants from bores, mating surfaces, andfasteners. Remove any existing burrs, etc., from the shafts.
2. Slide one coupling hub onto each shaft, using keys whererequired. Keys should fit snugly.
3. Position the hubs on the shafts to approximately achievethe “G” dimension shown in Table 2. It is usually best tohave any equal length of shaft extending into each hub.Tighten one hub in its final position.
For style 1 or style 2, if possible, slide the other hub farenough away to install elastomer. If hub cannot be slid back,or if “blind” assembly, tighten second hub on shaft andbring equipment together.
For style 3, tighten hubs on shafts, do not install cushionsand collar at this time. Tighten setscrews to the appropri-ate value shown in Table 1.
4. Check parallel alignment by placing a straight edge acrossthe two coupling hubs, and measuring the maximum off-set at various points around the periphery of the couplingwithout rotating the coupling. If the maximum offset exceedsthe figure shown under “Parallel” in Table 2, realign theshafts.
5. Check angular alignment with a micrometer, vernier, orcaliper. Measure “X” from one hub to the other at intervalsaround the coupling. Determine the maximum and mini-mum dimensions without rotating the coupling, the differ-ence of these two measurements must be less than theAngular value in Table 2. If a correction is necessary, besure to recheck the parallel alignment.
B. RES,RC, and LC TypesDetermine the size and type of coupling being used. also checkmaximum RPM values in Tables 2 and 3, against operatingspeed. Remove all components from their boxes and looselyassemble the coupling on any convenient surface.
Step1.
Inspect all coupling components and remove any protec-tive coatings or lubricants from bores, mating surfaces, andfasteners. Remove any existing burrs from the shafts.
Step 2.
Use appropriate section for the type of coupling assembly.
2a. For RRS Type - Styles 1, 2 and 3
1. Slide one hub onto each shaft, using keys where required.Position the hubs on the shafts to achieve spacer gap as inFigures 3 and 4. It is usually best to have an equal lengthof shaft extending into each hub. Line up the jaws of bothhubs and tighten them with set screw torque from Table 1
Installation Instructions
Page 6.26 Motion Technology
COUPLINGS Installation & Maintenance Tips
Installation Instructions
ous points around the periphery of the hubs without rotat-ing the coupling. If the maximum offset exceeds the paral-lel value under NBR in Table 2, realign the shafts.
3. Check angular alignment with a micrometer or caliper.Measure the “X” dimension from one hub to the other atintervals around the hubs. Refer to Figures 1 and 2 forStyles 1 and 2, respectively. Determine the maximum and
the minimum dimensions without rotating the coupling. Thedifference of these two measurements must be less thanthe angular value under NBR in Table 2. If a correction isnecessary, recheck the parallel alignment.
4. Install the snap-wrap spider and fasten the collar with capscrews. Proceed to Step 3.
Note:Install coupling guards per OSHA or ASME 815.1 require-ments.
Figure 1
Figure 3 Figure 4
Figure 5
Figure 2
Page 6.27Motion Technology
For Metric ScrewsCoupling Set Screw Tightening Torque Set Screw Tightening Torque
Size Size Length in.-lbs. Nm Size Length in.-lbs. N-mInch mm
3/16 & up 9-10 1.0-1.1L050 10-24 3/16 & up 32-36 3.6-4 M3 4 & up 5.3 0.6L070 1/4-20 3/16 45-50 5-5.6 M4 3 & up 18 2.0L075 1/4-20 1/4 & up 78-87 9-10 M6 4-6 4.4 5.0L090 1/4-20 1/4 & up 78-87 9-10 M6 8 & up 58-62 6.6-7.0L095 5/16-18 1/4 80-90 9-10 M8 5-8 84-88 9.5-10L099 5/16-18 5/16 & up 150-165 17-18 M8 10 & up 142-150 16-17L100 5/16-18 5/16 & up 150-165 17-18 M8 10 & up 142-150 16-17L110 3/6-16 1/4 135-150 15-17 M10 6-10 166-177 19-20L150 5/16 225-250 25-28 12 & up 283-300 32-34
3/8 & up 260-290 29-32
Coupling Set Screw Tightening Torque Set Screw Tightening TorqueSize Size Length ft.-lbs. N-m Size Length ft.-lbs. N-m
Inch mmL190 1/2-13 1/2 & up 45-50 61-68 M12 8-12 31-33 42-45L225 14 & up 42-44 57-60L276C226C276C280C285 5/8-11 5/8 & up 92-100 124-136 M16 16 63-66 86-90C295 18 & up 105-110 142-150
C2955H3067H3567H3667 3/4-10 3/4 & up 150-167 204-226 M20 20 98-103 133-140H4067 25 & up 210-221 285-300H4567
COUPLINGS Installation & Maintenance Tips
Installation and maintenance instructions are also available for S-Flex, Gear, Grid, Disc and Miniature Couplings.
Table 1. Tightening Torque for Set Screws
CouplingSelection
SELECTION AND DESIGN MANUALLovejoys Power Transmission Products Manual is the total solution to shaft cou-pling selection. The catalogue covers the worlds largest selection of couplingsmanufactured to international standards AGMA, ANSI, SAE, DIN, SIS. If youwould like a copy, contact your nearest BSC Centre.
COUPLING SELECTION SOFTWAREThis MS DOS programme will select Jaw, S-Flex and Gear couplings.
Page 6.28 Motion Technology
G*** Allowable Misalignment, inch (at 3600 RPM or lower)Size Style RPM* Dim. w/NBR or Urethane w/Hytrel w/Bronze
RRC2955 4 2300 1.88 0.015 0.160 0.015 0.015 0.015* Angular misalignment is the difference between X and X(max).RRC295 and RRC2955 are standard with minimum 4 inch spacers.
Table 3. Maximum RPM & Allowable Misalignment for RRS & RRC Types
* Maximum RPM for bronze spiders and cushions is 250 RPM regardless of size.** Angular misalignment is the difference between X and X(max).*** For RRS type couplings, see Table 3.