Return to the Metalworking Forum | Post a Follow-Up

Carbide tool bit inserts

Posted by bus_driver (My Page) on
Mon, Jul 31, 06 at 14:04

I bought a set of 5 tool bits from Harbor Freight- some call them Horrible Fright. My tool bits all use triangular inserts and are held in place with a screw that fits into a countersunk, through, hole in the center of the insert. HF does not offer inserts alone, as best I can determine. I have some TNMM-332 inserts which are close enough sized to work, but the hole diameter in the TNMM inserts is a bit too small for the screw and the TNMM is not countersunk. As far as I know, I have no way to drill the carbide hole larger. The HF inserts have no ID at all on them. Where can I find inserts for my bits?

Follow-Up Postings:

RE: Carbide tool bit inserts

Look in "Machinerie's Handbook".
They used to have the complete insert code in there and you can figure out what you are supposed to use.
A number of the larger insert companies also have pretty good catalogs.

 o Post a Follow-Up

Please Note: Only registered members are able to post messages to this forum.

    If you are a member, please log in.

    If you aren't yet a member, join now!

Return to the Metalworking Forum

Information about Posting

  • You must be logged in to post a message. Once you are logged in, a posting window will appear at the bottom of the messages. If you are not a member, please register for an account.
  • Please review our Rules of Play before posting.
  • Posting is a two-step process. Once you have composed your message, you will be taken to the preview page. You will then have a chance to review your post, make changes and upload photos.
  • After posting your message, you may need to refresh the forum page in order to see it.
  • Before posting copyrighted material, please read about Copyright and Fair Use.
  • We have a strict no-advertising policy!
  • If you would like to practice posting or uploading photos, please visit our Test forum.
  • If you need assistance, please Contact Us and we will be happy to help.

Learn more about in-text links on this page here