You’re probably familiar with our Shrink Discs, which are keyless external locking devices that eliminate fatigue-prone keyed connections in light- and heavy-duty applications. A modern method for creating a mechanical shrink fit, these components offer an even distribution of locking forces. But did you know, in addition to our standard units, we also offer split Shrink Discs and half Shrink Discs?

Here’s a quick rundown of each:

Our split Shrink Disc is a modified version of our standard Shrink Disc, consisting of a front outer ring, rear outer ring, two inner rings and screws. We add the letters “SR” (United States) or “GT” (Europe) to designate the split model.

This configuration, which offers greater mounting versatility, accommodates symmetrical hub designs, as half of the Shrink Disc is mounted on one side of the hub and the other half is mounted on the other side. Because our Shrink Disc screws pass through our customer’s hub, we must know the thickness of this hub so that we can calculate the correct screw length.

Also a modified version of our standard Shrink Disc, our half Shrink Disc consists of one outer ring, one inner ring and screws. Our half Shrink Discs have half the holding power of a standard or split Shrink Disc.

These models are available in two versions:

  • The “HC” version utilizes an outer ring with clearance holes, enabling the screws to pass through our outer ring and thread into the customer’s part.
  • The “HT” version utilizes an outer ring with threaded holes, enabling the screws to pass through our customer’s part and thread into the outer ring of our Shrink Disc. For the “HT” design, you must give us the thickness of your part so we can calculate the correct screw length.

The Benefits of Keyless Shrink Discs

A keyless shaft-to-hub connection, the Shrink Disc offers many benefits compared to conventional shrink fits, as well as wedge, keyway or polygonal connections. For example, you can install Shrink Discs in any position without worrying about lining up keyways. And, as an interference fit, they’re removable unlike welding or shrink fits, which require a torch. Other benefits of our Shrink Discs include the following:

  • Backlash-free operation
  • Wear- and maintenance-free
  • Units resist alternating torsion
  • Quick, easy installation and removal
  • Low susceptibility to contamination — when the locking screws are tightened, the functional contact surfaces are pressed together, preventing the ingress of dirt and moisture.

To learn more about which Shrink Disc is right for your application, drop us a line.

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