40B21 1" Finished Bore Sprocket (40BS21H-1)

Nitro 40B21-1 Finished Bore Sprocket

Our 40BS21H sprocket is an ANSI standard sprocket with a 1" finished bore that has a keyway & 2 setscrews. 40BS21 sprockets are a 21 tooth sprocket that works with ANSI #40 roller chain. These sprockets are manufactured from 1045CD carbon steel material. The sprocket teeth are hardened for increased wear resistance.

40BS21 1" Sprocket Dimensions:

• Fits ANSI Chain Size: #40
• Bore (D1): 1"
• Number Of Teeth: 21
• Pitch Diameter (dp): 3.355"
• 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: 1/4" X 1/8"
• Hardened Teeth: Yes (HRC 38-42)
• Number Of Setscrews: 2
• Material: 1045CD (Cold Drawn)
• Type Of Finish: Black Oxide

Interchange Numbers:

• 40BS21 1
• 40BS21H 1