I've got a slight problem. I turned a bar down to 0.62 to match the Collet but I forgot the collet needs something to protrude from the back of it so it sits far forward enough for the taper in the nut to tighten it so I got it tight and the bar fell out. The problem is the nut is stuck and I can't shift it, any ideas to get it free again?
Workshop shoes stay at the back door, milling swarf travels well. and women are not overly fond of it embedded in carpet or feet.
The the nut on the end of the chuck was stuck but I got it off now. Got another problem though, my bar is about 0.005" too small in the middle because my tailstock is 0.005" back from the center. These chucks are a nightmare to use though. In order for the collet to tighten, the cutter must protrude from the back of the collet by about 0.13" because basically the collets are too short.Do you mean the collet is stuck in the taper?
In an autolock chuck you do need a thread. The male centre in the body of the chuck pushes down on the cutter screwed into the collet that is pulled up by the threaded front section. Without a thread there is nothing to push against.You don't need it to be threaded as is not holding any cutting forces. Just turn up a rod that fits and can be tightened enough to hold.
That's what I was trying to describe. I think it might work with a little spacer behind it, I'll try tomorrow.In an autolock chuck you do need a thread. The male centre in the body of the chuck pushes down on the cutter screwed into the collet that is pulled up by the threaded front section. Without a thread there is nothing to push against.
Mike