Help With End Mill Holder

I recently got a very nice Weldon 1" end mill holder with a #9 B&S taper
shank for use with my Index 645 mill. The problem is the draw bar
threads, they are 3/8" NC rather than the "normal" 1/2" NC. I was going
to drill and retap to 1/2" until I checked the end of the shank with a
file. This thing is harder than Chinese algebra!!!!!!!!
I really don't want to have to make a 2nd draw bar. Any ideas???
Rex the Wrench
Reply to
Rex the Wrench
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Weldon shanks are pretty hard. Seems to me making another drawbar is going to be your best option.
Jim Kovar Vulcan, Mi
Reply to
Jim Kovar
Heat the small end with a big torch to red heat. It won't take very long with a big torch, and therefore won't heat the big end very much. I did this with a Chinese Morse taper holder that originally had a tang and I wanted to convert to drawbar. It softened the metal dramatically! I think I did this with a standard Bernzomatic torch.
Jon
Reply to
Jon Elson
Wouldn't a piece of threaded 3/8" NC rod, anfd a few nuts be all that you would need to make a new draw bar. That's what I did for my small Clausing mill.
Abrasha
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Reply to
Abrasha
Rex, this is very common. Simply make another draw bar. Its very easy, and doesnt require much work. I have two drawbars for every mill I own, both 1/2 & 3/8. I spritz some different colored Dychem on the ends to keep them id'd and hang em on the mill.
Gunner
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Reply to
Gunner
A nice excersize in threading...
That's what I did for my small Clausing mill.
And I did it for my mill/drill. Works great. That's what I figure my shop is for....
Paul in AJ AZ
Reply to
Pep674

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