Re: [CAD_CAM_EDM_DRO] cnc tapping Re: General Tool Life Question

> Fred's correct on this.
> Up until last year I used to run a small Myford C7 capstan lathe
> making laser cutting nozzles. That's all this machine ever did.
> Because the thread was very fine, short and in copper I couldn't use
> a coventry die head because as it pulled to release it ripped the
> threads. So I had to use a conventional die.
> I made one of these floating holders up. Ok it was for a die but the
> operation is the same.
> It was driven by two pins on the fixed shank butting against two pins
> on the back of the die holder. It was fed on and helped along, at the
> end of the thread it carried on and pulled off the pins. This then
> caused it to rotate free at spindle speed. The die holder was mounted
> on the fixed shank on a one way needle roller clutch combined bearing.
> Once the spindle was reversed the die holder was locked back on the
> fixed shank and backed off.
> I can't take any photo's as the machine was sold last year when the
> contract ended but I could sketch it up if needed.
>
> John S.