No. 25
PLAIN BORE SPROCKET DIMENSIONS
All dimensions in inches unless noted.
No. 25 Plain Bore Sprocket Diameters
Type “A” Plain Bore
Type “B” Plain Bore
No. Teeth
Outside Diameter
Pitch Diameter
Caliper Diameter
Plain Bore
Wt. Lbs.
Plain Bore
MAX Bore*
Hub Dia.
Wt. Lbs.
LTB Style
9
0.837
0.731
0.591
NS
NS
0.250
0.250 0.438 0.500
S
0.03
10
0.919
0.809
0.679
NS
NS
0.250
0.250 0.500 0.500
S
0.03
11
1.002
0.870
0.748
NS
NS
0.250
0.313 0.563 0.500
S
0.04
12
1.083
0.996
0.836
NS
NS
0.250
0.375 0.625 0.500
S
0.06
13
1.167
1.045
0.907
NS
NS
0.250
0.438 0.781 0.500
S
0.07
14
1.246
1.124
0.994
NS
NS
0.250
0.563 0.813 0.500
S
0.08
15
1.326
1.203
1.066
0.250
0.040
0.250
0.563 0.891 0.500
S
0.10
16
1.407
1.282
1.152
0.250
0.040
0.250
0.563 0.969 0.500
S
0.12
17
1.487
1.361
1.225
0.250
0.040
0.250
0.625 1.031 0.500
S
0.14
18
1.568
1.440
1.310
0.250
0.040
0.250
0.750 1.125 0.500
S
0.16
19
1.648
1.519
1.383
0.250
0.040
0.250
0.813 1.219 0.500
S
0.19
20
1.729
1.598
1.468
0.250
0.040
0.250
0.875 1.281 0.625
S
0.25
21
1.809
1.678
1.543
0.375
0.040
0.250
0.875 1.375 0.625
S
0.28
22
1.889
1.757
1.627
0.375
0.060
0.250
0.938 1.438 0.625
S
0.31
23
1.969
1.836
1.702
0.375
0.060
0.250
1.000 1.500 0.625
S
0.32
24
2.049
1.915
1.785
0.375
0.080
0.375
1.000 1.500 0.625
S
0.33
25
2.129
1.995
1.861
0.375
0.080
0.375
1.000 1.500 0.625
S
0.34
26
2.209
2.074
1.944
0.375
0.090
0.375
1.000 1.500 0.625
S
0.35
28
2.369
2.233
2.103
0.375
0.100
0.375
1.000 1.500 0.625
S
0.36
30
2.529
2.392
2.262
0.375
0.120
0.375
1.000 1.500 0.625
S
0.38
32
2.688
2.551
2.421
0.375
0.140
0.375
1.000 1.500 0.625
S
0.40
35
2.928
2.789
2.656
0.375
0.160
0.375
1.000 1.500 0.625
S
0.46
36
3.008
2.889
2.739
0.375
0.180
0.375
1.000 1.500 0.750
S
0.50
40
3.327
3.187
3.057
0.500
0.200
0.500
1.375 2.000 0.750
E
0.53
45
3.725
3.584
3.452
0.500
0.250
0.500
1.375 2.000 0.750
E
0.56
48
3.964
3.823
3.693
0.500
0.320
0.500
1.375 2.000 0.750
E
0.56
54
4.442
4.300
4.170
0.500
0.380
0.500
1.375 2.000 0.750
E
1.00
60
4.920
4.777
4.647
0.500
0.540
0.500
1.375 2.000 0.750
E
1.10
72
5.876
5.732
5.602
0.500
0.740
0.500
1.375 2.000 0.750
E
1.30
* Dimensions shown allow for standard keyway with set screw at 90 degrees NS = Non Stock
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