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Picture may not depict actual tooth count
Picture may not depict actual tooth count

50B21 7/8" Finished Bore Sprocket (50BS21H-7/8)

Item ID: 50B21-7/8
Availability: 53 In Stock
Price: $17.12
Retail Price:$22.64
Your Savings:$5.52(24%)

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Nitro 50B21-7/8 Finished Bore Sprocket

Our 50BS21H sprockets are manufactured to conform to the ANSI standards for chain & sprockets. This sprocket is a 21 tooth sprocket that is compatible with ANSI #50 roller chain. The 50BS21 7/8" sprocket is a finished bore style that has a standard keyway & 2 setscrews. Our sprocket teeth are hardened to help prevent tooth wear. A black oxide finish is applied to the sprocket for corrosion resistance.

50B21 sprocket diagram
50BS21 7/8" Sprocket Dimensions:
  • Fits ANSI Chain Size: #50
  • Bore (D1): 7/8"
  • Number Of Teeth:21
  • Outside Diameter (de): 4.521"
  • Sprocket Thickness (B1): 0.343" (Not including Hub)
  • Hub Diameter (dm): 3"
  • LTB - Length Thru Bore (A): 1"
  • Keyway Size: 3/16" X 3/32"
  • Hardened Teeth: Yes (HRC 38-42)
  • Number Of Setscrews: 2
  • Material: 1045CD (Cold Drawn)
  • Type Of Finish: Black Oxide
Interchange Numbers:
  • 50BS21 7/8
  • 50BS21H 7/8