HSK50A/63A-FMB face mill holder Face water FMB22/27/32/40 face mill shankHSK63A FMB face mill shank face water HSK63A FMB22 2732 40 face mill shank 1. Fine grinding of the end face and mandrel The end face and mandrel are clamped and finely ground at one time, which can make the perpendicularity between the end face and the mandrel better, the cutter head and the shank fit tightly, and the shock resistance is better 2. Carburizing and quenching process is adopted, which has high thermal strength and oxidation resistance,