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
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.
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.
"This device is provided without warranty of any kind as to reliability,
accuracy, existence or otherwise or fitness for any particular purpose
and Bioalchemic Products specifically does not warrant, guarantee,
imply or make any representations as to its merchantability for any
particular purpose and furthermore shall have no liability for or
responsibility to you or any other person, entity or deity with respect
to any loss or damage whatsoever caused by this device or object or by
any attempts to destroy it by hammering it against a wall or dropping it
into a deep well or any other means whatsoever and moreover asserts
that you indicate your acceptance of this agreement or any other
agreement that may he substituted at any time by coming within
five miles of the product or observing it through large telescopes or
by any other means because you are such an easily cowed moron
who will happily accept arrogant and unilateral conditions on a piece
of highly priced garbage that you would not dream of accepting on a
bag of dog biscuits and is used solely at your own risk.'