Originally Posted by
John Roberts
At the risk of irritating MotoTech further. The collet you are discussing looks very similar to the Lyndex I have, including the the brass deposit on the side of the slot and the brass coloured end face. Lyndex describe their collets having a' Hardened threaded bushing in the back for long life'. Could this be brazed in and any braze that crepted down the slot, machined afterwards?
Vertex, I believe are better produces then the cheaper Chinese tools. I would hope the quality of their collet is better than the one you have.
I do have some 5C Vertex collets but have not checked how accurate they are. Good luck!