Shaft diameter                                      Dimensions(mm.)
mm. inch K N L M D B
12 1/2 32 7 23 50 52 6
15 9/16        5/8 32 7 23 50 52 6
17 11/16 32 7 23 50 52 6
20 3/4 32 7 23 50 52 6
25 13/16      7/8         15/16       1 37 7 25 55 62 6
30 11/16     11/8       13/16      11/4 42 7 30 64 72 6
35 11/4        115/16   13/8        17/16 47 7 32 74.5 82 6
40 11/2       19/16 52 7 37 84 88 6
45 15/8        111/16    13/4 57 7 41 89 93 6
50  113/16   17/8        115/16     2 62 7 47 94 98 6
55  21/8       21/16      2 67 7 49 102 108 6
60 21/4       21/8       27/16 72 7 48 116 116 6