58561Re: [atlas_craftsman] Newbie parting question
- Jul 1, 2009You can get away with no top rake at that angle, but you do need to hone the
cutting face, and a chip curl on top will help. You will also want to use a
thinner blade than that. 1/8" is pretty severe for this family of lathes.
Ron Grossl wrote:
> Hello all, I recently purchased an Atlas 12X36 lathe. I am just now getting
> started on doing some work on it. I have used larger lathes a little, but by
> no means am I a proficient machinist. My question is on the use of the cut
> off tool that I got with it. I have an AXA style toolpost with a Universal
> parting toolholder. The blade is a 1/8 inch HSS steel blade. I have read
> many posts concerning the grinding of cutoff tools and they all say to grind
> relief on the sides and grind back rake on the top. My question is, since
> this toolholder actually holds the blade about 10 degrees from horizontal, is
> that back rake built in or do I still need to grind the top of the tool ?
> And since the tool blade is inclined, what angle should I grind the front of
> it ? Sorry to sound so ignorant, but I have found nothing on this.
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