What does CCMT stand for?

CCMT is a standard designation for indexable inserts, usually carbide inserts, though ceramic and high speed steel inserts are available (though rarer and less available than tungsten carbide). The four letters designate the shape, relief angle, tolerance and fixing type of the insert.

C - 80 degree diamond/rhombus

C - 7 degree relief angle

M - M class Tolerance

T - Countersunk hole for screw fixing

These 4 letters are proceeded by a numerical string indicating the size of the cutting insert and the radius of the cutting tip. For example CCMT 060204 is an insert with a 6mm cutting edge, 2mm in thickness ith a 0.4mm cutting radius.

CCMT 09t308 would be an insert with a 9mm cutting edge, 3mm thick with a 0.8mm tip radius. The "t" stands for "thickness".

To see our CCMT inserts, click here