Central Machinery 33684 Assembly And Operating Instructions Manual page 11

Threads
Per Inch A
12 40
13 40
14 40
16 40
18 40
19 40
20 40
22 40
24 40
26 40
28 20
32 20
36 20
Example: To cut 12 threads per inch (see illustration below), use 40T in position A, 30T in
position D, and put any other gear is position B to connect A and D.
B
D
Example: To cut 38 threads per inch (see illustration above), use 20T in position
A, 57T in position D, 50T in position B, and 60T in position C.
SKU #33684
Gear Settings for Various Thread Sizes
Stud Gear Box
B C D
30
65 60 30
35
40
45
50 60 57
50
55
60
65
35
40
45
A
A
B
D
Threads Stud Gear Box
Per Inch A
38 20
40 20
44 20
48 20
52 20
56 20
64 20
72 20
76 20
80 20
88 20
96 20
104 20
A
B C
D
Page 11
B C D
50 60 57
50
55
60
65
35 30 60
40 20 40
45 20 40
50 30 57
50 20 40
55 20 40
60 20 40
65 20 40
A
C B
D