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IdahoJim
12-25-2008, 09:02 PM
Can solid carbide lathe tool blanks be purchased? If so, where? I made a tangent tool holder for my lathe and would like to get some 1/4" blanks to make carbide bits for it.

lazlo
12-25-2008, 09:14 PM
Sure, MSC has pages of square, rectangle and round carbide blanks in all kinds of grades. I'd get a 1/4" square C-2 Micrograin blank -- the extra toughness would help with interrupted cuts.

IdahoJim
12-25-2008, 09:52 PM
Thanks, Lazlo, I thought i'd looked there, but will check again.
Jim

lazlo
12-25-2008, 10:43 PM
Here's a 1/4" x1/4" x 12" USA-Made carbide blank for $64.99:

http://www1.mscdirect.com/CGI/NNSRIT?PMPXNO=1728056&PMT4NO=55681161

MSC has 35% off until Friday, if you act fast: Code is WEB35

Teenage_Machinist
12-26-2008, 01:10 PM
They can be purchased, but they are blazingly expensive. You might try getting just a tiny carbide pellet and brazing onto a minishank to go in the tangent holder, as a tangental holder will only use a little bit at a time. Be careful if you use a long carbide piece as it may not be well supported as it would be if brazed or inserted.

noah katz
12-26-2008, 01:45 PM
"I'd get a 1/4" square C-2 Micrograin blank -- the extra toughness would help with interrupted cuts."

Micrograin is tougher, but isn't C2 is less tough than C5/C6?

Mcgyver
12-26-2008, 01:57 PM
.....or silver solder an insert on the end of some 1/4" stock

IdahoJim
12-26-2008, 02:57 PM
Considering the cost, I'm thinking of just not using the tangent holder when needing carbide. It works well with the HSS bits, though. Maybe I'll come across some sold carbide bits on Ebay, or Craigslist. I appreciate all the ideas, though.
Jim