The U-clip shaft collar from Amacoil Inc., Aston, Pa. (amacoil.com), slides easily in one direction onto hardened (minimum of 50 HRc) and unhardened shafts, but will not slide the other direction ...
The Elasto-Ring rubber washer cushions the U-Clip quick-release collar against any pressures. When a U-Clip quick–release collar is used to hold a reel or spool on a shaft, it can sometimes get stuck ...