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RENCOL® Tolerance Rings








 RENCOL® Tolerance Rings are curled metallic rings with corrugations formed around the circumference that act as springs. They enable optimal join between components, eliminating any need for welding and other components as they are simply press fitted between the frame and the casing for easy, quick and low-cost assembly.

Customising your RENCOL® Tolerance Ring

RENCOL® solutions are designed to join mating cylindrical parts in an economical and mechanically efficient way. Tolerance rings can make a big difference in a wide range of applications.

We work engineer-to-engineer with our customers to develop the ideal solution. We can customise everything from the material type to the shape of the wave features.

Selecting the basic ring shape

The first decision we will make will be based on whether a customer needs a Housing Variable (HV) ring or a Shaft Variable (SV) ring.

An HV ring is “open” in the free state, which means that when it is installed inside a bore it will conform to the bore and be self-retaining. The ring sits in the housing with its waves on the inside, which will be compressed by the outer diameter of the mating part.

An SV ring has a free-state diameter that is smaller than the shaft diameter that it will be installed on. This means when it is mounted on the shaft, the ring conforms to it and becomes self-retaining. The ring’s waves sit on the outside and are compressed by the bore of the housing.

Enhancing the ring shape

Once we have selected the basic ring shape, we define other features that will help enhance the performance of the application, such as tabs, flanges and fingers.

Specifying material type

When developing a tolerance ring, we can choose from a wide range of materials, and then treat it, if required, to deliver the required performance. By working in partnership with our customers, we can specify the ideal material and thickness for each system.

RENCOL® Tolerance Rings can be manufactured from high quality spring/carbon steel, stainless steel or many different alloys to deliver on requirements such as retention force, torque transfer, torque overload protection and axial slip between mating components.

Tailoring the wave features

The waves – also called corrugations or bumps – of a tolerance ring create an interference fit between mating components. We can alter the different wave features and deliver on customer requirements. Any part of the wave can be customised, from the shape and shoulders to the height, width and pitch.
