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Making short precision tapers

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Darren:
Hi John I have a couple of small chucks that I salvaged from old drills. I turned threaded shanks for them but they ended up off center.

Now I know what I need to do, thanks to your post, turn the shanks whilst in the chuck actually holding a small rod which is held in the lathe.

I also have a JT0 chuck that needs using....

So, some projects for later then..... :D

bogstandard:
Darren,

The only true way to get it perfectly concentric is to do what I did, mount a bar in the chuck first, turn perfectly concentric, then without removing it from the chuck, put on drill chuck and turn the back spindle. By doing that any error in both chucks is cancelled out.

John

SPiN Racing:
ooooh and run the lathe fast as heck when turning small diameter....

same with drilling small diameter then I guess.

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