1200-2100 rpm trip speed, 2.625 in. Od, 7.063 in. O/a lg, large end 2.625 in. Od, w/six no. 8-32 nc 0.500 in. Lg thd studs, ea w/nut and lockwasher, small end 1.125 in. Od, thd female, 0.875-20 unef thd size, 0.500 in. Dp, keyed shaft 0.188 in. Od, extends 0.313 in. Beyond thd connection