Where To Find These Inserts ?

[davidh]

per the photo, i need 4 or more carbide (?) inserts for these little boring tools. they measure nearly .100 thick and from flat to across the tip about .300. maybe if i had a number but i can't seem to locate them on Enco or Little Machine Shops sites. someone must recognize them. . . .

 

[T Bredehoft]

TPG (Triangle, Positive rake, ground finish) (diameter of inscribed circle in 1/16ths) (thickness in 1/32nds),( radius in 1/64), a guess 331.

 

[Paul in OKC]

Might try here http://www.mscdirect.com/product/details/04033098 There are TPG or TPU, one being ground, one utility. Basically the same insert.

 

[Heavycrimp]

FWIW, the first number is the inscribed circle in 1/8s, The second number is the thickness in 1/16ths and the third digit it the corner radius in 1/64s of an inch. So a TPG221 is a triangular ground positive rake insert, 1/4" IC, 1/8" thick with a 1/64 corner radius. TPG 322 is 3/8" IC, 1/8" thick with a 1/32 (2/64) corner radius, etc. That looks like a TPG22x series to me.

 

[T Bredehoft]

the corner radius in 1/64

Hey, I got one right. Its been like since 1979 I dealt with inserts.

 

[davidh]

thanks a lot. i did find the chart that explains and shows too. . . . found some easily and ordered a package. . . . I'm grateful. . .