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ER32 Chuck
Posted: Mon 08 Nov , 2010 7:40 am
by dazz
Hello
I purchased a ER32 chuck and collet set. The chuck holder is a standard 3MT version. Fine for my mill, but not so useful for the lathe. I made a chuck adapter.
The photos are not quite in the right order, but you should get the idea.
Regards
Dazz
Re: ER32 Chuck
Posted: Sat 25 May , 2013 21:16 pm
by Bogus105
hi Dazz,
can you tell me more about spindle thread? Witworth? BSF?
Re: ER32 Chuck
Posted: Sun 26 May , 2013 6:51 am
by dazz
Bogus105 wrote:hi Dazz,
can you tell me more about spindle thread? Witworth? BSF?
It's like a Whitworth thread with flat tops on the external spindle thread.
Look at this post
viewtopic.php?f=50&t=886
I would strongly recommend making a replica of the spindle thread to check the internal thread for fit.
You do not want to remove the workpiece only to find that it won't fit the lathe spindle.
Re: ER32 Chuck
Posted: Mon 27 May , 2013 16:12 pm
by Bogus105
Thread replica would be very helpful, but how to make it on my metric lathe?? If it was imperial version it would be easy to use MT3 arbor with a steel sleeve mounted on it, and cut 8tpi thread on 38.1mm O.D. and then skim it down to exactly the same O.D. as on spindle nose. Mine is metric.
Re: ER32 Chuck
Posted: Mon 27 May , 2013 20:19 pm
by dazz
Hi
I had a similar problem with making the metric collet holder thread on an imperial Denford. My solution was to get someone else to make the metric thread on their metric lathe.
You could get a set of change gears to convert from metric to imperial but it would be cheaper to convert to an electronic lead screw (ELS).
No easy answers on this one.