COMBINATION CHAIN SPROCKETS


Product Guide

Black Ace Combination Chain Sprockets are manufactured with the highest integrity. You will realize value, as these sprockets are flame-cut and machined with the highest precision available on the market.

  • ASME Standard Torch Profiles – Elongated Root Design promotes a self-cleaning effect of the root to keep your demanding applications moving.
  • A – B – C Hub Types –
    • A Type (no hub) typically used in weld-on applications.
    • B Type (hub on one side) used in applications where clearance width is narrow. More economical than C Type.
    • C Type (hub on both sides) used in applications where B Type is not wide enough to withstand torques produced by drive.
    • Split Style Construction – Once you use a Split Sprocket, you may never want to use a setscrew mount style again. Removal or installation is a breeze. Can be used in virtually all applications. An additional benefit to Black Ace’s split sprockets is that the shaft/keyway security is much tighter than a typical setscrew mount.
    • Hardening Available – Flame hardening of sprockets is available as an option.
Sprocket Series
 C55 C60 C77 C188 C131 C102B
Chain Pitch (inches)
 1.631 2.307 2.308 2.609 3.075 4
Chain Roller Diameter
 .72" .75" .72" .88" 1.250" .97"
Plate Thickness
 5/8" 7/8" 5/8" 1" 1" 2"
Common Designations
 C55 - C55L C60 C77 - N77 C188 - BRH188 - C188M C131 C102B - C102BM - N102B
NUMBER OF TEETH
 PITCH DIAMETERS
8 4.26 6.03 6.03 6.82 8.04 10.45
9 4.77 6.75 6.75 7.63 8.99 11.70
10 5.28 7.47 7.47 8.44 9.95 12.94
11 5.79 8.19 8.19 9.26 10.91 14.20
12 6.30 8.91 8.92 10.08 11.88 15.45
13 6.82 9.64 9.64 10.90 12.85 16.71
14 7.33 10.37 10.37 11.72 13.82 17.98
15 7.84 11.10 11.10 12.55 14.79 19.24
16 8.36 11.83 11.83 13.37 15.76 20.50
17 8.88 12.56 12.56 14.20 16.74 21.77
18 9.39 13.29 13.29 15.02 17.71 23.04
19 9.91 14.02 14.02 15.85 18.68 24.30
20 10.43 14.75 14.75 16.68 19.66 25.57
21 10.94 15.48 15.49 17.51 20.63 26.84
22 11.46 16.21 16.22 18.33 21.61 28.11
23 11.98 16.94 16.95 19.16 22.58 29.38
24 12.50 17.67 17.68 19.99 23.56 30.65
25 13.01 18.41 18.41 20.82 24.53 31.91
26 13.53 19.14 19.15 21.64 25.51 33.18
27 14.05 19.87 19.88 22.47 26.49
28 14.57 20.60 20.61 23.30 27.46
29 15.09 21.34 21.35 24.13 28.44
30 15.60 22.07 22.08 24.96 29.42
31 16.12 22.80 22.81 25.79 30.39
32 16.64 23.54 23.55 26.62 31.37
33 17.16 24.27 24.28 27.45 32.35
34 17.68 25.00
35 18.20 25.74
36 18.71 26.47
37 19.23 27.20
38 19.75 27.94
39 20.27 28.67
40 20.79 29.40