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. 808-7106
Mfr. Part No.OMEGA-E40-ELEMENT
BrandRexnord
PHP23,848.69
Each
units
- Tyre Coupling 9.5in - - 621Nm - - 0.031in 0.188in - - -
RS Stock No. 325-8224
Mfr. Part No.MWS20-6-6-SS
BrandRuland
PHP3,096.87
Each
units
6mm Beam Coupling 20mm 20mm - 1.15Nm 2.48°/Nm - 0.2mm 0.12mm - - -
RS Stock No. 750-6732
Mfr. Part No.E69-C06B
BrandOmron
PHP1,661.48
Each
units
6mm - 15mm 22mm - 0.8Nm 7Nm/rad - 0.5mm ±0.4mm - - -
RS Stock No. 449-0542
Mfr. Part No.MSPC-40-40-F
BrandRuland
PHP13,551.10
Each
units
40mm Rigid Coupling 77mm 108mm - - - - - - - - - -
RS Stock No. 808-7305
Mfr. Part No.ROTEX28-92SHEL-KTR
BrandKTR
PHP472.40
Each
units
- Curved Jaw Coupling - - - - - - 0.9° 0.25mm -0.7 mm, +1.5 mm - - -
RS Stock No. 489-3705
Mfr. Part No.13024168
BrandLenze
PHP782.61
Each
units
1/4in Straight Jaw Coupling 27.4mm 43mm Jaw - - - 0.12mm +1.4mm - - -
RS Stock No. 325-8038
Mfr. Part No.MWC15-5-5-SS
BrandRuland
PHP2,788.68
Each
units
- Beam Coupling 15mm 20mm - 0.81Nm 5.21°/Nm - 0.2mm 0.12mm - - -
RS Stock No. 325-8252
Mfr. Part No.MWS25-10-10-SS
BrandRuland
PHP2,826.30
Each
units
- Beam Coupling 25mm 24mm - 3.1Nm 1.75°/Nm - 0.38mm 0.25mm - - -
RS Stock No. 410-6512
Mfr. Part No.RS1761026
BrandHengstler
PHP823.43
Each
units
- - 15mm 20mm - 70Ncm 12Nm/rad - ±2.5° ±0.3mm ±0.2mm - - -
RS Stock No. 325-8280
Mfr. Part No.MWS30-12-12-SS
BrandRuland
PHP4,976.47
Each
units
- Beam Coupling 30mm 30mm - 6.6Nm 0.93°/Nm - 0.38mm 0.25mm - - -
RS Stock No. 808-7096
Mfr. Part No.OMEGA-E30-ELEMENT
BrandRexnord
PHP28,400.41
Each
units
- Tyre Coupling 8.25in - - 412Nm - - 0.031in 0.188in - - -
RS Stock No. 808-7125
Mfr. Part No.OMEGA-ES40-ELEMENT
BrandRexnord
PHP33,631.13
Each
units
- Tyre Coupling 9.5in - - 621Nm - - 0.094in 0.25in - - -
RS Stock No. 808-7083
Mfr. Part No.OMEGA-E3-ELEMENT
BrandRexnord
PHP10,636.07
Each
units
- Tyre Coupling 4in - - 41Nm - - 0.063in 0.188in - - -
RS Stock No. 808-7115
Mfr. Part No.OMEGA-ES5-ELEMENT
BrandRexnord
PHP21,298.77
Each
units
- Tyre Coupling 5.38in - - 105Nm - - 0.063in 0.25in - - -
RS Stock No. 808-7156
Mfr. Part No.OMEGA-E30-HUB-PB
BrandRexnord
PHP17,150.66
Each
units
50 → 75mm Tyre Coupling 8.25in 5.44in - 412Nm - - - - - - - -
RS Stock No. 364-3149
Mfr. Part No.PCR16-6-6-A
BrandRuland
PHP2,049.35
Each
units
- Beam Coupling 1in 1.25in - 41lb/in 0.103°/lb-in - 0.015in 0.01in - - -
RS Stock No. 489-3862
Mfr. Part No.13024175
BrandLenze
PHP2,346.21
Each
units
7/16in Straight Jaw Coupling 54mm 54mm - - - - 0.12mm +1.4mm - - -
RS Stock No. 489-3761
Mfr. Part No.13005523
BrandLenze
PHP160.57
Each
units
- Straight Jaw Coupling - - - - - - 0.4mm 0.45mm - - -
RS Stock No. 492-9270
Mfr. Part No.KUP-1010-B
BrandSick
PHP2,441.25
Each
units
10mm - 21mm 29mm - - 120Nm/rad - 0.3mm 0.4mm - - -
RS Stock No. 814-506
Mfr. Part No.PCMR25-8-8-A
BrandRuland
PHP2,415.78
Each
units
- Beam Coupling 25.4mm 31.8mm - 3.73Nm 1.57°/Nm - 0.381mm 0.254mm - - -
Related Products
Designed to perform where higher speeds, greater misalignment, ...
Description:
Designed to perform where higher speeds, greater misalignment, and limited lubrication would exceed the capabilities of other couplings. Each coupling is manufactured as one piece, thereby eliminating mechanical joints and possible failure points.Two fixing styles available:,Typical applications include encoders, ...
Designed to perform where higher speeds, greater misalignment, ...
Description:
Designed to perform where higher speeds, greater misalignment, and limited lubrication would exceed the capabilities of other couplings. Each coupling is manufactured as one piece, thereby eliminating mechanical joints and possible failure points.Two fixing styles available:,Typical applications include encoders, ...