This evening, before going down the pub, I wanted to cut some metal in the TW mill. But, even though my mind told me I had a 30 int collet holder, when I went to look I had anything but. There were 3 M12s, a couple of 1/2 inch whit, and the clarkson, which I failed to find a thread to fit. My drawbar was 3/8 whit.
So what I did was machine the thread off my drawbar and tig a bored out M12 thread on instead. So what about the Clarkson - do they have a unique thread? I tried metric, unc, whit, nothing. The M12 goes in far enough to hold, but it's bugging me.
Whilst typing this I remembered what I thought I had that fitted the drawbar - it was a boring head, quite a nice one, which will now end up M12.
So what I did was machine the thread off my drawbar and tig a bored out M12 thread on instead. So what about the Clarkson - do they have a unique thread? I tried metric, unc, whit, nothing. The M12 goes in far enough to hold, but it's bugging me.
Whilst typing this I remembered what I thought I had that fitted the drawbar - it was a boring head, quite a nice one, which will now end up M12.