Overload couplings are used to disconnect the drive immediately after exceeding the set torque limit. The available models differ in mounting and reconnection options. They are not damaged after their activation. Prepared at the factory to the customer’s specified shaft diameters.

Overload couplings are used in industrial drives, from miniature laboratory equipment through pumps, machine tools to heavy machines in the mining industry.

SL series

• moments of disconnection: 10 – 700 Nm
• holes’ diameters: 12 – 60 mm
• automatic switch-on
• low mass and moment of inertia
• corrosion resistant
• easy torque adjustment

ST series

• moments of disconnection: 200 – 250 000 Nm
• holes’ diameters: 30 – 340 mm
• complete disconnection when the preset torque is exceeded
• robust, compact design

SK series

• disconnection moments: 0.1 – 2800 Nm
• holes’ diameters: 3 – 100 mm
• low residual friction after disconnection
• automatic or manual switch-on
• non-separable version as overload detector

ESL Series

• economic execution without torque control
• holes’ diameters: 6 – 38 mm
• transferred moments: 1 – 150 Nm
• automatic switch-on

R+W engineers designed the STF 20000 overload coupling, which is 4 meters in diameter. The coupling was used as a protection for two 6MW motors, whose task is to test wind turbines. This solution has a chance to be included in the Guinness Book of Records as the largest overload coupling in the world.

R+W is very often involved in innovative projects. It is the industry leader in terms of technology and new implementations.

40% of R+W’s sales are couplings manufactured to individual customer orders.