Cutting internal threads on Sherline lathe

You could make the adapter shorter if you choose. The ones made by A2Z to fit the Sherline mill were only about 3/4" long. Most of that length was threaded into the Criterion head, with maybe 3/16" sticking out the back of the head in a hex configuration. Worked well.

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Ooo, that's nice.

I think I'll wrap this one up (it will be shorter than the picture, I haven't even started to lay out the criterion side). But I'm definitely intrigued by having the inside and outside threads overlap. Maybe I'll practice Rev B in aluminum.
 
Doesn't have to be a hex, either. Round with two opposing flats would work nicely, too. Just try to keep it short to improve rigidity.
 
Had a blowout. The drive dog pin on the lead screw extension popped out.

It looks like it's just a press fit. Is there a standard size machine screw that I could run in there to get a more reliable hold?
 
If anyone finds themselves in the same predicament a 4-40 set screw is wonderful
 
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