ILCO 23RF Fine Milling Cutter. Material HSS. Diameter 2.25″. Thickness .25″. Hole diameter .5″. Cutter profile angle A = 45 degree, B = 0 degree, F In. .031R. Used with the following machines, ILCO 008, 008A, 008B, 2184CD, H2584CV, 2585DU, 190; DL 145, 145M, 147, 149M; HPC 9100, 9110; Taylor KD1, KD5, KD20; Keil 4-1/2, 12-1/2, 13-1/2, 15; Curtis 2000. Fine milling cutters are manufactured using the same technique for milling cutters. They feature fine, closely spaced teeth, a smooth cutting action, and greater service life compared to the rotary file-type cutter.