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. 489-3828
Mfr. Part No.13005538
BrandLenze
MYR53.70
Each
units
- Straight Jaw Coupling - - - - - - 0.5° 0.4mm 0.4mm - - -
RS Stock No. 489-3705
Mfr. Part No.13024168
BrandLenze
MYR75.31
Each
units
1/4in Straight Jaw Coupling 27.4mm 43mm Jaw - - - 0.12mm +1.4mm - - -
RS Stock No. 489-3856
Mfr. Part No.13007068
BrandLenze
MYR173.49
Each
units
- Straight Jaw Coupling - - - - - - 0.5° 0.4mm 0.4mm - - -
RS Stock No. 489-3812
Mfr. Part No.13005520
BrandLenze
MYR17.88
Each
units
- Straight Jaw Coupling - - - - - - 0.5° 0.4mm 0.4mm - - -
RS Stock No. 489-3761
Mfr. Part No.13005523
BrandLenze
MYR16.86
Each
units
- Straight Jaw Coupling - - - - - - 0.4mm 0.45mm - - -
RS Stock No. 489-3834
Mfr. Part No.13005531
BrandLenze
MYR66.77
Each
units
- Straight Jaw Coupling - - - - - - 0.5° 0.4mm 0.4mm - - -
RS Stock No. 489-3862
Mfr. Part No.13024175
BrandLenze
MYR225.79
Each
units
7/16in Straight Jaw Coupling 54mm 54mm - - - - 0.12mm +1.4mm - - -
RS Stock No. 489-3698
Mfr. Part No.13024167
BrandLenze
MYR50.43
Each
units
1/8in Straight Jaw Coupling 16mm 21mm - - - - 0.12mm +1.4mm - - -
RS Stock No. 489-3840
Mfr. Part No.13005532
BrandLenze
MYR105.46
Each
units
- Straight Jaw Coupling - - - - - - 0.5° 0.4mm 0.4mm - - -
RS Stock No. 489-3777
Mfr. Part No.13007070
BrandLenze
MYR21.95
Each
units
- Straight Jaw Coupling - - - - - - 0.4mm 0.45mm - - -
RS Stock No. 489-3799
Mfr. Part No.13007045
BrandLenze
MYR44.42
Each
units
- Straight Jaw Coupling - - - - - - 0.4mm 0.45mm - - -
RS Stock No. 489-3783
Mfr. Part No.13005536
BrandLenze
MYR18.60
Each
units
- Straight Jaw Coupling - - - - - - 0.4mm 0.45mm - - -
RS Stock No. 489-3733
Mfr. Part No.13024240
BrandLenze
MYR229.59
Each
units
3/8in Straight Jaw Coupling 54mm 54mm Jaw - - - 0.12mm +1.4mm - - -
RS Stock No. 489-3755
Mfr. Part No.13007059
BrandLenze
MYR13.81
Each
units
- Straight Jaw Coupling - - - - - - 0.4mm 0.45mm - - -
RS Stock No. 489-3727
Mfr. Part No.13024170
BrandLenze
MYR115.06
Each
units
1/2in Straight Jaw Coupling 45mm 54mm - - - - 0.12mm +1.4mm - - -
RS Stock No. 489-3711
Mfr. Part No.13024169
BrandLenze
MYR102.93
Each
units
1/4in Straight Jaw Coupling 35mm 51mm - - - - 0.12mm +1.4mm - - -