Spur Gears: 64 Diametral Pitch Ratings

20° Pressure Angle

1/8″ Face

Number of Teeth Pitch diameter Outside Diameter Stock Bore Hub Diameter Hub Projection Style Catalog Number
Brass
Steel
16
.250
.2812
1/8
3/16
3/16
Plain
TBT6416
TST6416
18
.281
.3125
1/8
7/32
3/16
Plain
TBT6418
TST6418
20
.3125
.3437
1/8
1/4
3/16
Plain
TBT6420
TST6420
24
.375
.4062
1/8
9/32
3/16
Plain
TBT6424
TST6424
28
.4375
.4687
1/8
11/32
3/16
Plain
TBT6428
TST6428
32
.500
.5312
3/16
3/8
1/4
Plain
TBT6432
TST6432
36
.5625
.5937
3/16
7/16
1/4
Plain
TBT6436
TST6436
40
.625
.6562
3/16
7/16
1/4
Plain
TBT6440
TST6440
44
.6875
.7187
3/16
1/2
1/4
Plain
TBT6444
TST6444
48
.750
.7812
3/16
1/2
1/4
Plain
TBT6448
TST6448
52
.8125
.8437
3/16
9/16
1/4
Plain
TBT6452
– – – – –
56
.875
.9062
3/16
9/16
1/4
Plain
TBT6456
– – – – –
60
.9375
.9687
3/16
5/8
1/4
Plain
TBT6460
– – – – –
64
1.000
1.0312
1/4
5/8
1/4
Plain
TBT6464
– – – – –
72
1.125
1.1562
1/4
11/16
1/4
Plain
TBT6472
– – – – –
80
1.250
1.2812
1/4
11/16
1/4
Plain
TBT6480
– – – – –
88
1.375
1.4062
1/4
3/4
1/4
Plain
TBT6488
– – – – –
96
1.500
1.5312
1/4
3/4
1/4
Plain
TBT6496
– – – – –
112
1.750
1.7812
1/4
13/16
1/4
Plain
TBT64112
– – – – –
128
2.000
2.0312
1/4
7/8
1/4
Plain
TBT64128
– – – – –