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40B21 7/8
Picture may not depict actual tooth count

40B21 7/8" Finished Bore Sprocket (40BS21H-7/8)

Item ID: 40B21-7/8
Availability: 50 In Stock Nitro 40B21-7/8
Price: $12.48

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ANSI Type B / BS finished bore sprockets have a hub on one side with two set screws and a keyway.  All Type B / BS Nitro sprockets have a black oxide finish.

Fits ANSI Chain Size: #40
Bore (D1): 7/8
Number Of Teeth:21
Outside Diameter (de): 3.618"
Sprocket Thickness (B1): 0.284" (Not including Hub)
Hub Diameter (dm): 2-3/4"
LTB - Length Thru Bore (A): 1"
Keyway Size: 3/16" X 3/32"
Hardened Teeth: Yes (HRC 38-42)
Number Of Setscrews: 2

Interchange Numbers:


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