How do I order inserts for this?

[Tim Wescott]

I have this bit set, it says "uses TT inserts", and "3/8 inch inscribed circle". But that's it.

But when I search for "TT insert" I don't find anything (except that bit set). I did find this useful page that seems to indicate that I can maybe work out the inscribed circle.

Can I just get anything with a screw hole and a 3/8" inscribed circle, and know it'll work?

 

[Scott_M]

Hi Tim
If you scroll to the bottom of the page you linked to, there are some TT321 inserts from interstate.
TT321 is a very common size. Try your search again with the 321.

Scott

 

[Tim Wescott]

Thanks! I was getting nothing with "TT insert"; TT321 makes all the difference.

 

[Jasonb]

Careful, if you click on the "more info in catalogue" link that gives different codes for "Borite brand only"

 

[L98fiero]

Pretty much any TPxT321 insert will work, they have an 11 degree relief angle and are single sided with a chipbreaker and a Ø.15 countersunk hole. The difference seems to be that the TT inserts have a small chipbreaker for very light cuts. Frankly though, unless you have a specific application where those tools are needed, you can make the holders a lot cheaper than what MSC/Borite wants, there are sets with 10 extra inserts on eBay for $65