Reply To: Making a 5C Collet Chuck

[SteveIParticipant @stevei]

Hi,

You might consider a hybrid approach. use spindle mounted collets upto 1/2". You'll get the best run out and rigidity. Then for large items you'll need one of the other solutions proposed.

I thought that the old style boxford lathes "327" collets are as per the Hardinge 3C specification. I would expect that 3C collets would be readily available new and second hand in North America. You'd only need to decide to either make or buy the closer and drawbar. One of the advertisers to the right on the web site have 2 listed with some collets, although genuine Boxford accessories are never cheap. (I know since I also have a boxford lathe but the more modern design for which the accessories are even rarer and more eye watering.)

Good luck

Steve