The A4 groove and turn inserts are made of Kyon 3500 — a silicon nitride Si3N4 ceramic grade developed by Kennametal Inc. (www.kennametal.com). The inserts also are available in carbide grades.

KENNAMETAL introduced the Grooving Universal Positive Profiling geometry (GUP-V), expanding its Beyond Evolution grooving and cut-off series of insert tools. ... “Together with the other insert ...