Roller Chain Sprocket; 12B-1 Chain; 20 Teeth; 1 Row of Teeth; No Hardened Teeth; 131.724MM Outside Diameter; 121.78MM Pitch Diameter; A-No Hub; Rough Bore Mount; No Bushing; 19.05MM Chain Pitch; ISO Roller Chain; No Keyway; Steel Material

Roller Chain Sprocket; 12B-1 Chain; 56 Teeth; 1 Row of Teeth; No Hardened Teeth; A-No Hub; Rough Bore Mount; No Bushing; 19.05MM Chain Pitch; ISO Roller Chain; No Keyway; Steel Material

Roller Chain Sprocket; 12B-1 Chain; 51 Teeth; 1 Row of Teeth; No Hardened Teeth; 318.4MM Outside Diameter; 309.45MM Pitch Diameter; A-No Hub; Rough Bore Mount; No Bushing; 19.05MM Chain Pitch; ISO Roller Chain; No Keyway; Steel Material

Roller Chain Sprocket; 12B-1 Chain; 20 Teeth; 1 Row of Teeth; Hardened Teeth; 131.724MM Outside Diameter; 121.78MM Pitch Diameter; B-Hub One Side; Rough Bore Mount; No Bushing; 19.05MM Chain Pitch; ISO Roller Chain; No Keyway; Steel Material

Roller Chain Sprocket; 12B-1 Chain; 57 Teeth; 1 Row of Teeth; No Hardened Teeth; 356.718MM Outside Diameter; 345.81MM Pitch Diameter; A-No Hub; Rough Bore Mount; No Bushing; 19.05MM Chain Pitch; ISO Roller Chain; No Keyway; Steel Material