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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Omschrijving Prijs 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-stocknr. 489-3705
Fabrikantnummer13024168
FabrikantLenze
10,11 €
Each
Aantal stuks
1/4in Straight Jaw Coupling 27.4mm 43mm Jaw - - - 0.12mm +1.4mm - - -
RS-stocknr. 748-235
Fabrikantnummer321.12.2222
FabrikantHuco
64,99 €
Each
Aantal stuks
6mm Bellows Coupling 12mm 23mm Set Screw 79Ncm 27Nm/rad 18.5 x 10^-8kg/m² 14° +1.6 → -2.2mm 1.72mm Electrodeposited Nickel - -
RS-stocknr. 423-1696
FabrikantnummerMJC19-6-A
FabrikantRuland
12,49 €
Each
Aantal stuks
6mm Curved Jaw Coupling 19.1mm 27.2mm Clamp - - - - - - - - -
RS-stocknr. 808-7266
FabrikantnummerROTEX14-Complete-KTR
FabrikantKTR
24,82 €
Each
Aantal stuks
6 → 16mm Curved Jaw Coupling 30mm 35mm - - - - 1.2° 0.17mm -0.5 mm, +1.0 mm - - -
RS-stocknr. 808-7288
FabrikantnummerROTEX19-Complete-KTR
FabrikantKTR
34,04 €
Each
Aantal stuks
19 → 24mm Curved Jaw Coupling 41mm 66mm - - - - 1.1° 0.2mm -0.5 mm, +1.2 mm - - -
RS-stocknr. 296-9800
FabrikantnummerMCLX-6-6-F
FabrikantRuland
22,75 €
Each
Aantal stuks
6mm Rigid Coupling 18mm 30mm - - - - - - - - - -
RS-stocknr. 748-285
Fabrikantnummer321.17.3232
FabrikantHuco
85,16 €
Each
Aantal stuks
10mm Bellows Coupling 17mm 27mm Set Screw 132Ncm 103Nm/rad 36.2 x 10^-8kg/m² 18° +3 → -4mm 1.78mm Electrodeposited Nickel - -
RS-stocknr. 296-9822
FabrikantnummerMCLX-8-8-F
FabrikantRuland
24,90 €
Each
Aantal stuks
8mm Rigid Coupling 24mm 35mm - - - - - - - - - -
RS-stocknr. 489-3834
Fabrikantnummer13005531
FabrikantLenze
12,90 €
Each
Aantal stuks
- Straight Jaw Coupling - - - - - - 0.5° 0.4mm 0.4mm - - -
RS-stocknr. 693-2477
Fabrikantnummer530.20.2222
FabrikantHuco
16,08 €
Each
Aantal stuks
6mm Bellows Coupling 20mm 31mm Set Screw 2.27Nm 315Nm/rad 90 x 10^-8kg/m² 0.06mm 0.35mm Stainless Steel - -
RS-stocknr. 477-9873
FabrikantnummerPCMR25-10-6-A
FabrikantRuland
42,70 €
Each
Aantal stuks
- Beam Coupling 25.4mm 31.8mm - - - - 0.381mm 0.254mm - - -
RS-stocknr. 449-0362
FabrikantnummerMCLX-20-20-F
FabrikantRuland
28,01 €
Each
Aantal stuks
20mm Rigid Coupling 42mm 65mm - - - - - - - - - -
RS-stocknr. 814-607
FabrikantnummerPSMR19-6-6-A
FabrikantRuland
31,42 €
Each
Aantal stuks
- Beam Coupling 19.1mm 22.9mm - 1.58Nm 2.9°/Nm - 0.203mm 0.127mm - - -
RS-stocknr. 423-1905
FabrikantnummerJD12/19-98R
FabrikantRuland
4,50 €
Each (In a Pack of 2)
Aantal stuks
- Curved Jaw Coupling 19.1mm - - - - - 0.8° 0.08mm 0.51mm - 98Shore A 19 mm Hubs
RS-stocknr. 808-7323
FabrikantnummerROTEX28-Complete-KTR
FabrikantKTR
52,00 €
Each
Aantal stuks
28 → 38mm Curved Jaw Coupling 66mm 90mm - - - - 0.8° 0.25mm -0.7 mm, +1.5 mm - - -
RS-stocknr. 814-635
FabrikantnummerPSMR25-10-10-A
FabrikantRuland
30,15 €
Each
Aantal stuks
- Beam Coupling 25.4mm 31.8mm - - 1.8°/Nm - 0.381mm 0.254mm - - -
RS-stocknr. 296-9917
FabrikantnummerMCLC-20-20-F
FabrikantRuland
60,10 €
Each
Aantal stuks
20mm Rigid Coupling 42mm 65mm - - - - - - - - - -
RS-stocknr. 809-0736
Fabrikantnummer047.10.2828.RS
FabrikantHuco
14,84 €
Each
Aantal stuks
8mm Double Loop Elastomer - 27mm - 0.5Nm - - 10° - 4.5mm - - -
RS-stocknr. 477-9766
FabrikantnummerFCMR19-5-5-A
FabrikantRuland
38,01 €
Each
Aantal stuks
- Beam Coupling 19.05mm 31.75mm - 2.94Nm 1.331°/Nm - 0.203mm 0.127mm - - -
RS-stocknr. 607-6750
FabrikantnummerKUP-0610-B
FabrikantSick
33,00 €
Each
Aantal stuks
6mm - 21mm 29mm - - 120Nm/rad - 0.3mm 0.4mm - - -
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