Modified Stock Gearing - Boston Gear

Ladder Chain Sprockets
Type B Single Hub
Nos. 1-2 and 2-1/2; Bronze and Steel (All Sprockets Have Standard Setscrews)
H
.120
P.D.
.170
P.D.
3/32
Teeth
No. 1
ALL DIMENSIONS IN INCHES
ORDER BY CATALOG NUMBER OR ITEM CODE
Pitch
Bore
Hub
Style
Catalog Item
Diam.
Diameter Project
Number Code
STEEL SPROCKETS
6 .57 1/4 1/2** 1/2 Plain C1 6 14810
7 .66 1/4 9/16** 1/2 Plain C1 7 14812
8 .75 5/16 11/16** 1/2 Plain C1 8 14814
10 .93 5/16 7/8** 1/2 Plain C1 10 14818
12 1.10 5/16 7/8 1/2 Plain C1 12 14820
14 1.28 5/16 7/8 1/2 Plain C1 14 14822
16 1.46 5/16 7/8 1/2 Plain C1 16 14824
20 1.83 1/2 1-3/8 1/2 Plain C1 20 14826
26 2.37 1/2 1-3/8 1/2 Plain C1 26 14828
32 2.92 1/2 1-3/8 1/2 Plain C1 32 14830
Nos. 2 and 2-1/2
BRONZE SPROCKETS
10 1.14 3/16 9/16 5/16 Web CB3 10 16920
12 1.36 1/4 5/8 5/16 Web CB3 12 16922
16 1.81 1/4 5/8 5/16 Web CB3 16 16924
20 2.26 5/16 3/4 3/8 Web CB3 20 16926
22 2.48 5/16 3/4 3/8 Web CB3 22 16928
24 2.70 5/16 3/4 3/8 Web CB3 24 16930
45 5.06 3/8 7/8 7/16 Spoke CB3 45 16936
STEEL SPROCKETS
8 .92 3/8 13/16† 11/16 Plain C3 8 14842
9 1.03 3/8 15/16† 11/16 Plain C3 9 14844
10 1.14 3/8 1-1/32† 11/16 Plain C3 10 14846
12 1.36 1/2 1-1/4† 11/16 Plain C3 12 14850
14 1.59 1/2 1-1/4 11/16 Plain C3 14 14852
16 1.81 1/2 1-15/32 11/16 Plain C3 16 14854
20 2.26 1/2 1-1/2 11/16 Plain C3 20 14856
30 3.38 1/2 1-5/8 11/16 Plain C3 30 14860
**Blind hole—3/4” deep from Hub End.
†Has Recessed Groove in Hub for Chain Clearance
STANDARD TOLERANCES
Dimension
Tolerance
Bore All ±.001
170
3/32
P.D.
292 Boston Gear 800-825-6544 P-1930-BG 04/10