Description & Specifications
120A42 sprockets are a ANSI standard size that has 120A42 teeth and works with #120 roller chain. These sprockets are known as a "Type A", which is a hubless roller chain sprocket. Our 120A42 plate sprockets are a durable, high strength sprocket that is manufactured from 1045 cold drawn carbon steel.

120A42 Sprocket Dimensions
- ANSI Chain Size:120
- Bore (B):1-1/2"
- Tooth Count:42
- Pitch Diameter (PD):20.072''
- Outside Diameter (D):20.916''
- Sprocket Thickness (T):0.924"
- Material:1045CD
- Hardened Teeth:Yes (HRC 40-50)
- Type Of Finish:Black Oxide
All dimensions listed are nominal values.

