Modified Stock Gearing - Boston Gear
Modified Stock Gearing - Boston Gear
Modified Stock Gearing - Boston Gear
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Roller Chain Sprockets<br />
Single Strand<br />
No. 50 5/8" Pitch; Steel<br />
ORDER BY CATALOG NUMBER OR ITEM CODE<br />
No.<br />
Length<br />
With Keyway Without Keyway<br />
Pitch<br />
Hub<br />
& Setscrew* or Setscrew<br />
of<br />
Bore<br />
thru<br />
Teeth<br />
Dia.<br />
Dia.<br />
Bore<br />
Catalog Item Catalog Item<br />
Number Code Number Code<br />
TYPE B SINGLE HUB STEEL<br />
3/4 50B21-3/4 36536 50B21 15824<br />
1 50B21-1 15292<br />
1-1/8 50B21-1-1/8 36540<br />
21 4.193 1-3/16 3 1 50B21-1-3/16 36538<br />
1-1/4 50B21-1-1/4 15294<br />
1-3/8 50B21-1-3/8 36542<br />
1-7/16 50B21-1-7/16 56739<br />
1-1/2 50B21-1-1/2 15296<br />
3/4 50B22-3/4 36546 50B22 15826<br />
1 50B22-1 15300<br />
1-1/8 50B22-1-1/8 36548<br />
22 4.392 1-3/16 3 1 50B22-1-3/16 36550<br />
1-1/4 50B22-1-1/4 15302<br />
1-3/8 50B22-1-3/8 36552<br />
1-7/16 50B22-1-7/16 36554<br />
1-1/2 50B22-1-1/2 15304<br />
3/4 50B23-3/4 36558 50B23 15828<br />
1 50B23-1 15308<br />
1-1/8 50B23-1-1/8 36560<br />
23 4.590 1-3/16 3 1 50B23-1-3/16 36562<br />
1-1/4 50B23-1-1/4 15310<br />
1-3/8 50B23-1-3/8 36564<br />
1-7/16 50B23-1-7/16 36566<br />
1-1/2 50B23-1-1/2 15312<br />
3/4 50B24-3/4 36570 50B24 15830<br />
1 50B24-1 15316<br />
1-1/8 50B24-1-1/8 36572<br />
24 4.788 1-3/16 3 1-1/4 50B24-1-3/16 36574<br />
1-1/4 50B24-1-1/4 15318<br />
1-3/8 50B24-1-3/8 36576<br />
1-7/16 50B24-1-7/16 36578<br />
1-1/2 50B24-1-1/2 15320<br />
3/4 50B25-3/4 36582 50B25 15832<br />
1 50B25-1 36584<br />
1-1/8 50B25-1-1/8 36586<br />
25 4.987 1-3/16 3 1-1/4 50B25-1-3/16 36588<br />
1-1/4 50B25-1-1/4 36590<br />
1-3/8 50B25-1-3/8 36592<br />
1-7/16 50B25-1-7/16 36594<br />
1-1/2 50B25-1-1/2 36596<br />
3/4 50B26-3/4 36602 50B26 36598<br />
1 50B26-1 36604<br />
26 5.185 1-1/8 3 1-1/4 50B26-1-1/8 36606<br />
1-3/16 50B26-1-3/16 36608<br />
1-1/4 50B26-1-1/4 36610<br />
1-7/16 50B26-1-7/16 36612<br />
1-1/2 50B26-1-1/2 36614<br />
3/4 50B28-3/4 36638 50B28 36630<br />
1 50B28-1 36640<br />
28 5.582 1-1/8 3 1-1/4 50B28-1-1/8 36642<br />
1-3/16 50B28-1-3/16 36644<br />
1-1/4 50B28-1-1/4 36646<br />
1-7/16 50B28-1-7/16 36648<br />
1-1/2 50B28-1-1/2 36650<br />
3/4 50B30-3/4 36674 50B30 16488<br />
1 50B30-1 36676<br />
30 5.979<br />
1-1/8<br />
50B30-1-1/8 36678<br />
3 1-1/4<br />
1-3/16 50B30-1-3/16 36680<br />
1-1/4 50B30-1-1/4 36682<br />
1-7/16 50B30-1-7/16 36684<br />
1-1/2 50B30-1-1/2 36686<br />
P.D.<br />
.343<br />
MAX.<br />
MAXIMUM DIA. OF CHAIN OVER<br />
SPROCKET = SPROCKET P.D. + .594”<br />
STANDARD TOLERANCES<br />
Dimension<br />
Tolerance<br />
Bore All ±.001<br />
Reference Pages<br />
Alterations – 316<br />
Horsepower Ratings – 260-262<br />
Lubrication – 259<br />
Materials – 316<br />
Selection Procedure – 258<br />
ANSI Diameters – 317<br />
*All sprockets have standard keyway. All<br />
sprockets have 5/16–18 setscrews<br />
located over keyway except at 90° where<br />
marked.<br />
H<br />
P-1930-BG 04/10 <strong>Boston</strong> <strong>Gear</strong> 800-825-6544 281
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