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Ringfeder – Keyless Shaft-Hub Locking Devices

Ringfeder Power Transmission has a long tradition of excellence in products including Locking Devices/Assemblies, Shrink Discs, Shock Absorbing Technology, a complete line of couplings e.g. Rigid Disc, Servo-Insert, Safety, Barrel, Torsionally Flexible, and the TNR coupling for drivetrains.

Ringfeder Brands

Ringfeder Brands


Keyless shaft-hub locking devices have been the cornerstone of RINGFEDER POWER TRANSMISSION. For over 50 years, our product offering of internal clamping and external clamping locking devices and global support has been unparalleled in the industry.


TSCHAN products have a proven track record throughout the world in various technological applications: in the metal and steel industry, in transport systems, power generation, diesel-electric generators, mining machinery, and in specialist solutions that use special drive in technology systems.


For more than 30 years, GERWAH has specialized in trailblazing couplings for driving technology and conveying engineering. Their portfolio includes metal bellows and servo-insert couplings. From industrial machinery of all kinds to servo systems, linear or high-speed Drivers, customers from all around the globe rely on the precision of GERWAH components.


RINGFEDER has excelled in offering premium quality locking devices to the market for almost a century. With the same outlook on quality, but at a more economical price, RINGFEDER is pleased to offer the ECOLOC devices for budget conscious customers.

Ringfeder Products

Locking Devices

Damping Technology

Tschan Couplings

Gerwah Couplings

Ecoloc Products

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an order?

ISC Companies is a top distributor of power transmission and electrical parts. We have many different models and brands in stock for fast delivery. Our sales professionals are happy to assist you in the selection process to ensure the correct part is specified for your application. Get a quote by clicking below on “Request Pricing” and filling out the contact form or give us a call at 1-800-627-9434.

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