Dormer produces two ranges of Solid Carbide Taps, whose main function is to allow threads to be made in hardened steels, with a hardness range of 49 – 63 Rockwell. Both taps are for machining through and blind holes - the T100 is for AMG 1.7, the T110 for AMG 1.8. The T110 has extra flutes for improved chip breaking and removal |