A while back we were kicking around a thread on collet chucks. There was talk of making your own, and there was talk of one on ebay UK.
One member here (sorry, I forget who) posted that he¡¯d bought one and it had .004¡± run out.
Well, in a silly moment i bought one also, and mine is twice as good ¡®cause it has .008¡± run out!!
So, I decided to go ahead and re-cut it on my unimat along the lines of the ¡°make your own¡± discussion. What the heck, I can usually get under .001¡± and this was already threaded for the spindle and should be pretty straightforward as long as i can get the taper right, right?
So I turned it down with the idea of cutting off the threaded portion and rethreading further ¡°up¡± the body, then recutting the taper inside.
But when turning it down I received an interesting surprise as shown in this photo:
It seems this chuck is not one piece, but rather an adapter that has been pressed on the end of someone else¡¯s chuck! No wonder there was so much run out!
Not that i know what to look for I can see the different colors of the two parts:
in guess you could try to straighten this by wacking it with a hammer, but I don¡¯t hate my spindle bearings that much. It¡¯s not their fault I bought this!
Guess I¡¯m gonna try the ¡°make your own chuck from scratch route.
Best Regards
John
John Entwistle
