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 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 Material
RS Stock No. 146-2844
Mfr. Part No.WE4HMTL
BrandTB Woods
£32.78
Each
Units
- 115mm 87mm - 62Nm 607Nm/rad - 1.6mm - - - - -
RS Stock No. 146-2832
Mfr. Part No.WES20M
BrandTB Woods
£286.97
Each
Units
- 187mm 284mm - 260Nm 3120Nm/rad - 2.4mm - - - - -
RS Stock No. 146-2847
Mfr. Part No.WE20HMTL
BrandTB Woods
£64.91
Each
Units
- 187mm 114mm - 260Nm 3120Nm/rad - 2.4mm - - - - -
RS Stock No. 146-2836
Mfr. Part No.WE3HMMPB
BrandTB Woods
£22.36
Each
Units
- 108mm 110mm - 41Nm 532Nm/rad - 1.6mm - - - - -
RS Stock No. 146-2845
Mfr. Part No.WE5HMTL
BrandTB Woods
£41.76
Each
Units
- 137mm 100mm - 105Nm 1110Nm/rad - 1.6mm - - - - -
RS Stock No. 146-2820
Mfr. Part No.WE3M
BrandTB Woods
£56.53
Each
Units
- 108mm 110mm - 41Nm 532Nm/rad - 1.6mm - - - - -
RS Stock No. 146-2841
Mfr. Part No.WE30HMMPB
BrandTB Woods
£169.31
Each
Units
- 214mm 193mm - 412Nm 4770Nm/rad - 2.4mm - - - - -
RS Stock No. 146-2833
Mfr. Part No.WES30M
BrandTB Woods
£386.30
Each
Units
- 214mm 296mm - 412Nm 4770Nm/rad - 2.4mm - - - - -
RS Stock No. 146-2848
Mfr. Part No.WE30HMTL
BrandTB Woods
£91.31
Each
Units
- 214mm 129mm - 412Nm 4770Nm/rad - 2.4mm - - - - -
RS Stock No. 146-2837
Mfr. Part No.WE4HMMPB
BrandTB Woods
£22.22
Each
Units
- 115mm 119mm - 62Nm 607Nm/rad - 1.6mm - - - - -
RS Stock No. 146-2822
Mfr. Part No.WE5M
BrandTB Woods
£130.77
Each
Units
- 137mm 135mm - 105Nm 1110Nm/rad - 1.6mm - - - - -
RS Stock No. 146-2826
Mfr. Part No.WE40M
BrandTB Woods
£235.25
Each
Units
- 247mm 207mm - 622Nm 7370Nm/rad - 2.4mm - - - - -
RS Stock No. 146-2843
Mfr. Part No.WE3HMTL
BrandTB Woods
£27.32
Each
Units
- 108mm 87mm - 41Nm 532Nm/rad - 1.6mm - - - - -
RS Stock No. 146-2831
Mfr. Part No.WES10M
BrandTB Woods
£248.12
Each
Units
- 165mm 223mm - 164Nm 1790Nm/rad - 1.6mm - - - - -
RS Stock No. 146-2846
Mfr. Part No.WE10HMTL
BrandTB Woods
£47.78
Each
Units
- 165mm 103mm - 164Nm 1790Nm/rad - 1.6mm - - - - -
RS Stock No. 146-2835
Mfr. Part No.WE2HMMPB
BrandTB Woods
£19.63
Each
Units
- 94mm 96mm - 22Nm 358Nm/rad - 1.6mm - - - - -
RS Stock No. 146-2819
Mfr. Part No.WE2M
BrandTB Woods
£59.42
Each
Units
- 94mm 96mm - 22Nm 358Nm/rad - 1.6mm - - - - -
RS Stock No. 146-2840
Mfr. Part No.WE20HMMPB
BrandTB Woods
£76.46
Each
Units
- 187mm 173mm - 260Nm 3120Nm/rad - 2.4mm - - - - -
RS Stock No. 146-2821
Mfr. Part No.WE4M
BrandTB Woods
£114.36
Each
Units
- 115mm 119mm - 62Nm 607Nm/rad - 1.6mm - - - - -
RS Stock No. 146-2825
Mfr. Part No.WE30M
BrandTB Woods
£267.23
Each
Units
- 214mm 193mm - 412Nm 4770Nm/rad - 2.4mm - - - - -