Shaft length including spider 2.562 in., 0.371 in. To 0.373 in. Dia, grooved 0.29 to 0.032 @wide 0.749 to 0.752 from @end, opposite end stepped, first step 0.04990 to 0.4993, second step, 0.4999 @to 0.5002, spider end holes 0.1565 to 0.1570 dia, 1.247 to 1.253 c to c