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Help identifying collets

Spruewell

Hot Rolled
Joined
Sep 8, 2015
Location
Northern California
Just got a Live tapping head for my Miyano JNC 45. It came with one collet, but I have never seen one quite like this before. I would like to identify it so I can start building a set. Thank you
 

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What make is the tapping head?
A scale alongside the collets would also help.
Do the collets also have a square at the bottom?

Maybe I'm missing something, but how do you run a live tapping head from a lathe with no live tooling?
JR
 
The live tooling option on this machine is not some cobbled on bastard adaptation. The machine came with this option from Miyano. For scale, the collet has a 5/16 hole in it. At first glance, it is very similar to the “ER” series collets and would fall somewhere between an ER11 and ER16 in size except that the tapers do not meet at a groove, but rather a step. The back end of the collet is externally keyed, square internally and can spin independently from the rest of the collet.
 
Thank you! The RDO-16 or RDO-20 style looks pretty darn close. Still looking to see if there is a tapping variant that would have the free spinning, keyed back end. The TG style don’t have the tapered front end like this one does.
 








 
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