Boring Bars

The 221 has a nose radius of.016" and the 222 has a nose radius of .031"

Darrell

Hello guys:
I too worked for Kennametal for 35 years and know many of the nomenclatures off hand. The "S10" indicates that bar is Steel and is 10/16ths diameter or 5/8". "K" in older tooling means that the tool uses a Clamp only to hold the insert in place. Current descriptions use a "C" for a Clamp only arrangement for B-Bars. "T" indicates a triangular insert. "F" indicates that the tool has a "0" degree lead to produce a flat bottom. "P" indicates that the locating walls on the pocket are 11 degrees. And "R" indicates Right Hand. The "2" at the end indicates that the size of the triangular insert with 11 degree relief, is 2/8ths of an inch inscribed circle or 1/4" Inscribed circle in the ANSI system is somewhat misleading in that the size is described by the largest circle that touches all of the insert's edges.
The insert letters and numbers have meaning as well. T-triangle, P-11 deg. relief/clearance angle, G ground to +/-.001 tol. on this size insert. 2/8" IC (1/4"), 2/16" thick (1/8"), 1, 2, 3 indicates the number of 1/64" at the corner radius. Since these inserts are ground (G tolerance) they are often dead sharp IF they are uncoated or PVD coated. If an insert is CVD coated it will not be dead sharp and most often will be an "M" tolerance insert. "M" indicates +/-.002 IC 0n most small inserts, larger inserts will have greater tol.

Hopes this helps.
Best regards, Gary

Thank Gary.
That helped a lot in what all the letters and numbers stand for.

Yes, Gary, Thanks. I worked with those things for 25 years and had only a basic understanding, I'd figured out the TPG 222, but beyond that it was all Greek.

If you want HSS Arthur Warner Co. Talk Kevin .
B.J.



















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