MD adjustable boring bars from Criterion use 80° diamond inserts, and dual insert pockets accept either 7° or 8° side-clearance inserts.
These boring bars permit conversion of an endmill holder to an adjustable boring bar. Available shank diameters are 5/8 in., 3/4 in., and 11/4 in. for both triangular and 80° diamond inserts.
Criterion Machine Works
Costa Mesa, Calif.