Modified Stock Gearing - Boston Gear
Modified Stock Gearing - Boston Gear
Modified Stock Gearing - Boston Gear
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H<br />
Roller Chain Sprockets<br />
Single Strand<br />
No. 40 1/2" Pitch; Steel<br />
P.D.<br />
TYPE A<br />
.284<br />
MAX.<br />
Reference Pages<br />
P.D.<br />
Alterations –316<br />
Horsepower Ratings – 260-262<br />
Lubrication – 259<br />
Materials – 316<br />
Selection Procedure – 258<br />
ANSI Diameters – 317<br />
TYPE B<br />
.284<br />
MAX.<br />
MAXIMUM DIA. OF CHAIN OVER<br />
SPROCKET = SPROCKET P.D. +.469”<br />
STANDARD TOLERANCES<br />
Dimension<br />
Tolerance<br />
Type A Bore All +.002 - .001<br />
Type B Bore All ±.001<br />
*All sprockets have standard keyways.<br />
All sprockets have 1/4-20 setscrews,<br />
located over keyway, except at 90°<br />
where marked.<br />
✝Has recessed groove in the hub for<br />
chain clearance.<br />
No.<br />
of<br />
Teeth<br />
ORDER BY CATALOG NUMBER OR ITEM CODE<br />
Pitch Catalog Item<br />
Dia.<br />
Bore<br />
Number<br />
Code<br />
TYPE A—NO HUB STEEL<br />
19 3.038 40A19 68007<br />
20 3.196 40A20 68008<br />
21 3.355 40A21 56747<br />
22 3.513 40A22 56748<br />
23 3.672 5/8 40A23 56749<br />
24 3.831 40A24 56750<br />
25 3.989 40A25 56751<br />
26 4.148 40A26 67014<br />
27 4.307 40A27 67015<br />
28 4.466 40A28 67016<br />
30 4.783 40A30 16258<br />
32 5.101 40A32 16260<br />
35 5.578 19/32 40A35 68023<br />
36 5.737 40A36 16262<br />
38 6.055 40A38 68026<br />
40 6.373 40A40 16264<br />
42 6.691 40A42 16266<br />
45 7.168 40A45 16268<br />
48 7.645 23/32 40A48 16270<br />
54 8.599 40A54 16272<br />
60 9.554 40A60 16274<br />
72 11.463 40A72 16278<br />
84 13.372 40A84 16282<br />
96 15.282<br />
40A96 16284<br />
112 17.828<br />
15/16<br />
40A112 16286<br />
ORDER BY CATALOG NUMBER OR ITEM CODE<br />
With Keyway Without Keyway<br />
No. Pitch<br />
Hub Length and Setscrew* and Setscrew<br />
of<br />
Dia.<br />
Bore<br />
Dia. thru<br />
Teeth<br />
Bore<br />
Catalog Item Catalog Item<br />
Number Code Number Code<br />
TYPE B SINGLE HUB STEEL<br />
8 1.307 1/2 31/32† 7/8 — — 40B8 15682<br />
9 1.462<br />
1/2<br />
40B9-1/2* 14980 40B9 15684<br />
5/8<br />
1-1/16† 7/8<br />
40B9-5/8* 14982<br />
1/2 40B10-1/2 14984 40B10 15686<br />
10 1.618<br />
5/8<br />
1-1/4† 7/8<br />
40B10-5/8* 14986<br />
3/4 40B10-3/4* 14988<br />
1/2 40B11-1/2 36054 40B11 15688<br />
5/8<br />
40B11-5/8 14990<br />
11 1.775 3/4 1-3/8† 7/8 40B11-3/4 14992<br />
7/8 40B11-7/8* 14994<br />
1/2 40B12-1/2 36056 40B12 15690<br />
5/8 40B12-5/8 14996<br />
12 1.932 3/4 1-9/16† 7/8 40B12-3/4 14998<br />
7/8 40B12-7/8 15000<br />
1 40B12-1* 15002<br />
1/2 40B13-1/2 36058 40B13 15692<br />
5/8 40B13-5/8 15004<br />
13 2.089 3/4 1-9/16 7/8 40B13-3/4 15006<br />
7/8 40B13-7/8 15008<br />
1 40B13-1* 15010<br />
1/2 40B14-1/2 36060 40B14 15694<br />
5/8 40B14-5/8 15012<br />
14 2.247 3/4 1-11/16 7/8 40B14-3/4 15014<br />
7/8 40B14-7/8 15016<br />
1 40B14-1 15018<br />
1-1/8 40B14-1-1/8* 56732<br />
1/2 40B15-1/2 36062 40B15 15696<br />
5/8 40B15-5/8 15020<br />
3/4 40B15-3/4 15022<br />
15 2.405 7/8 1-13/16 7/8 40B15-7/8 15024<br />
1 40B15-1 15026<br />
1-1/8 40B15-1-1/8 15028<br />
1-3/16 40B15-1-3/16* 15030<br />
1-1/4 40B15-1-1/4* 15032<br />
274 <strong>Boston</strong> <strong>Gear</strong> 800-825-6544 P-1930-BG 04/10
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