Couplings

Couplings are used to join two shafts together for the purpose of transmitting power.


Couplings can be either material flexing or mechanical flexing.


Typical uses for couplings are motor to pump, motor to gear box and motor to electric actuator.


Factors to consider unless you are replacing a like for like coupling are:


  • Horsepower of the motor

  • RPM

  • BSE (the distance between shaft ends

  • Operating temperature

  • Space available

  • Run cycle

  • Angular, parallel or axial misalignment handling

There are many different types of couplings available and many factors should be considered before deciding on a specific type.


Some of the types of couplings available:


General purpose, backlash free, flexible beam couplings feature multiple helical cuts and are machined from one piece material. They have 0.4 to 12 Nm nominal torque range and reduces wind-up compared to single beam coupling. Flexible beam couplings are used in a variety of motion-control applications, from aviation and lab equipment to robotics and medical devices. A common industrial application arises when a motor is connected to a pump. Factory automation equipment and other machine tools rely on flexible beam couplings to transmit power from a motor source.


Bellows couplings are made of a thin-walled, flexible metal corrugation (bellows) that is connected between two clamping hubs. They are designed to create a low inertia zero-backlash coupling which will last a long time without maintenance. Bellows couplings can accommodate all forms of misalignment and have a balanced design for reduced vibration at high speeds. They’re best suited for applications where precise positioning is required, such as in material handling or general automation and assembly.


Jaw couplings are used within electrical motor and internal combustion systems to transmit power (torque). They are designed to connect two shafts, enabling smooth torque transmission and reducing loss of power. Jaw couplings work by preventing shock loading (the sudden and drastic increase of load in a system) and/or accommodating shaft misalignment where this has been caused by thermal expansion or manufacturing inefficiencies.


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Description Price Bore Coupling Types Outside Diameter Length Fastening Type Torque Rating Torsional Stiffness Moment of Inertia Misalignment - Angular Misalignment - Parallel Misalignment - Axial Bellows Material Shore Hardness Suitable For Use With
RS Stock No. 837-1085
Mfr. Part No.L090/095NR
BrandSKF
MYR14.50
Each
units
- Straight Jaw Coupling 54mm - - - - - 0.38mm - - - -
RS Stock No. 837-1076
Mfr. Part No.L075NR
BrandSKF
MYR10.34
Each
units
- Straight Jaw Coupling 44.5mm - - - - - 0.38mm - - - -
RS Stock No. 837-1108
Mfr. Part No.L095
BrandSKF
MYR115.94
Each
units
9mm Straight Jaw Coupling 54mm 25mm Set Screw - - - - - - - - -
RS Stock No. 862-5859
Mfr. Part No.F120FTBFLG
BrandSKF
MYR915.75
Each
units
- Tyre Coupling 314mm 79.5mm - 3547Nm 296Nm/rad - 3.2mm 4mm - - -
RS Stock No. 862-5795
Mfr. Part No.F80FRTYRE
BrandSKF
MYR192.01
Each
units
- Tyre Coupling 211mm 44.5mm - 759Nm 63Nm/rad - 2.1mm 2.6mm - - -
RS Stock No. 862-5799
Mfr. Part No.F80FTBFLG
BrandSKF
MYR339.08
Each
units
- Tyre Coupling 211mm 57.5mm - 759Nm 63Nm/rad - 2.1mm 2.6mm - - -
RS Stock No. 862-5789
Mfr. Part No.F70FTBFLG
BrandSKF
MYR318.45
Each
units
14 → 50mm Tyre Coupling 187mm 43.5mm - 487Nm 41Nm/rad - 1.9mm 2.3mm - - -
RS Stock No. 862-5777
Mfr. Part No.F60NRTYRE
BrandSKF
MYR69.44
Each
units
- Tyre Coupling 165mm 41.5mm - 318Nm 26Nm/rad - 1.6mm 2mm - - -
RS Stock No. 862-5761
Mfr. Part No.F60FRTYRE
BrandSKF
MYR155.37
Each
units
- Tyre Coupling 165mm 41.5mm - 318Nm 26Nm/rad - 1.6mm 2mm - - -
RS Stock No. 862-5834
Mfr. Part No.F110FTBFLG
BrandSKF
MYR595.45
Each
units
- Tyre Coupling 279mm 63.5mm - 2137Nm 178Nm/rad - 2.9mm 3.7mm - - -
RS Stock No. 837-1054
Mfr. Part No.L070
BrandSKF
MYR61.94
Each
units
9mm Straight Jaw Coupling 35mm 19mm Set Screw - - - - - - - - -
RS Stock No. 862-5812
Mfr. Part No.F90NRTYRE
BrandSKF
MYR124.72
Each
units
- Tyre Coupling 235mm 58.5mm - 1096Nm 91Nm/rad - 2.4mm 3mm - - -
RS Stock No. 862-5828
Mfr. Part No.F100HTBFLG
BrandSKF
MYR486.50
Each
units
- Tyre Coupling 254mm 58.5mm - 1517Nm 126Nm/rad - 2.6mm 3.3mm - - -
RS Stock No. 862-5837
Mfr. Part No.F100NRTYRE
BrandSKF
MYR216.53
Each
units
- Tyre Coupling 254mm 58.5mm - 1517Nm 126Nm/rad - 2.6mm 3.3mm - - -
RS Stock No. 862-5786
Mfr. Part No.F70FRTYRE
BrandSKF
MYR162.03
Each
units
- Tyre Coupling 187mm 36.5mm - 487Nm 41Nm/rad - 1.9mm 2.3mm - - -
RS Stock No. 837-1066
Mfr. Part No.L090
BrandSKF
MYR92.41
Each
units
9mm Straight Jaw Coupling 54mm 21mm Set Screw - - - - - - - - -
RS Stock No. 862-5783
Mfr. Part No.F70HTBFLG
BrandSKF
MYR274.16
Each
units
- Tyre Coupling 187mm 36.5mm - 487Nm 41Nm/rad - 1.9mm 2.3mm - - -
RS Stock No. 862-5806
Mfr. Part No.F90FRTYRE
BrandSKF
MYR204.33
Each
units
- Tyre Coupling 235mm 58.5mm - 1096Nm 91Nm/rad - 2.4mm 3mm - - -
RS Stock No. 862-5856
Mfr. Part No.F120NRTYRE
BrandSKF
MYR309.78
Each
units
- Tyre Coupling 314mm 79.5mm - 3547Nm 296Nm/rad - 3.2mm 4mm - - -
RS Stock No. 862-5824
Mfr. Part No.F100FTBFLG
BrandSKF
MYR486.50
Each
units
- Tyre Coupling 254mm 64.5mm - 1517Nm 126Nm/rad - 2.6mm 3.3mm - - -