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

40BS21 1" Sprocket Description

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"
• Hub Diameter (dm):2-3/4"
• LTB - Length Thru Bore (A):1"
• Keyway Size:1/4" X 1/8"
• Hardened Teeth:Yes (HRC 40-50)
• Number Of Setscrews:2
• Material:1045CD (Cold Drawn)
• Type Of Finish:Black Oxide

Interchange Numbers:

• 40BS21 1
• 40BS21H 1