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 Misalignment - Angular Misalignment - Parallel Misalignment - Axial Bellows Material
RS Stock No. 808-7106
Mfr. Part No.OMEGA-E40-ELEMENT
BrandRexnord
PHP25,576.87
Each
units
- Beam Coupling 9.5in - - 621Nm - 0.031in 0.188in -
RS Stock No. 808-7096
Mfr. Part No.OMEGA-E30-ELEMENT
BrandRexnord
PHP28,981.23
Each
units
- Beam Coupling 8.25in - - 412Nm - 0.031in 0.188in -
RS Stock No. 808-7083
Mfr. Part No.OMEGA-E3-ELEMENT
BrandRexnord
PHP10,923.51
Each
units
- Beam Coupling 4in - - 41Nm - 0.063in 0.188in -
RS Stock No. 808-7125
Mfr. Part No.OMEGA-ES40-ELEMENT
BrandRexnord
PHP37,231.39
Each
units
- Beam Coupling 9.5in - - 621Nm - 0.094in 0.25in -
RS Stock No. 808-7115
Mfr. Part No.OMEGA-ES5-ELEMENT
BrandRexnord
PHP23,128.92
Each
units
- Beam Coupling 5.38in - - 105Nm - 0.063in 0.25in -
RS Stock No. 808-7156
Mfr. Part No.OMEGA-E30-HUB-PB
BrandRexnord
PHP16,985.99
Each
units
50 → 75mm Beam Coupling 8.25in 5.44in - 412Nm - - - - -
RS Stock No. 808-7153
Mfr. Part No.OMEGA-E3-HUB-T/L
BrandRexnord
PHP3,973.76
Each
units
25 → 34mm Beam Coupling 4in 3.44in - 41Nm - - - - -
RS Stock No. 808-7074
Mfr. Part No.OMEGA-E2-ELEMENT
BrandRexnord
PHP9,912.31
Each
units
- Beam Coupling 3.5in - - 21Nm - 0.063in 0.188in -
RS Stock No. 808-7134
Mfr. Part No.OMEGA-E2-HUB-PB
BrandRexnord
PHP2,595.75
Each
units
28mm Beam Coupling - - - 21Nm - - - - -
RS Stock No. 808-7112
Mfr. Part No.OMEGA-ES4-ELEMENT
BrandRexnord
PHP11,572.39
Each
units
- Beam Coupling 4.56in - - 62Nm - 0.063in 0.188in -
RS Stock No. 808-7159
Mfr. Part No.OMEGA-E40-HUB-PB
BrandRexnord
PHP14,711.77
Each
units
65 → 85mm Beam Coupling 9.5in 6.5in - 621Nm - - - - -
RS Stock No. 808-7140
Mfr. Part No.OMEGA-E5-HUB-PB
BrandRexnord
PHP4,370.04
Each
units
32 → 48mm Beam Coupling 5.38in 4.25in - 105Nm - - - - -
RS Stock No. 808-7169
Mfr. Part No.OMEGA-E10-HUB-T/L
BrandRexnord
PHP6,789.50
Each
units
42 → 55mm Beam Coupling 6.38in 4.06in - 164Nm - - - - -
RS Stock No. 808-7175
Mfr. Part No.OMEGA-E40-HUB-T/L
BrandRexnord
PHP17,383.84
Each
units
65 → 85mm Beam Coupling 9.5in 5.88in - 621Nm - - - - -
RS Stock No. 808-7235
Mfr. Part No.VIVA-V150-HUB-PB
BrandRexnord
PHP7,687.03
Each
units
42 → 65mm Beam Coupling 150mm - - 250Nm - - - - -
RS Stock No. 808-7092
Mfr. Part No.OMEGA-E20-ELEMENT
BrandRexnord
PHP23,310.54
Each
units
- Beam Coupling 7.25in - - 260Nm - 0.031in 0.188in -
RS Stock No. 808-7103
Mfr. Part No.OMEGA-ES3-ELEMENT
BrandRexnord
PHP15,132.51
Each
units
- Beam Coupling 4in - - 41Nm - 0.063in 0.188in -
RS Stock No. 808-7187
Mfr. Part No.VIVA-V125-ELEMENT
BrandRexnord
PHP6,672.67
Each
units
- Beam Coupling 120mm - - 105Nm - 1.6mm 4.9mm -
RS Stock No. 808-7190
Mfr. Part No.VIVA-V150-ELEMENT
BrandRexnord
PHP14,073.16
Each
units
- Beam Coupling 150mm - - 250Nm - 1.6mm 6.1mm -
RS Stock No. 808-7147
Mfr. Part No.OMEGA-E20-HUB-PB
BrandRexnord
PHP10,517.62
Each
units
- Beam Coupling 7.25in 4.25in - 260Nm - - - - -