Synchronous Pulley; 50MM Belt Width; 8 MM Belt Pitch; 8M-50 Belt Style; 31 Teeth; 60MM Face Width; Rough Bore; 77.65MM Outside Diameter; 78.94MM Pitch Diameter; No Keyway; No Bushing; Yes Minimum Plain Bore

Roller Chain Sprocket; 80 Chain; 31 Teeth; 1 Row of Teeth; No Hardened Teeth; 10.434" Outside Diameter; 9.884" Pitch Diameter; B-Hub One Side; Bushed Mount; 2517 Bushing; 1" Chain Pitch; ANSI Roller Chain; Keyway; Steel Material

Synchronous Pulley; 3" Belt Width; 1/2 Inch Belt Pitch; H Belt Style; 31 Teeth; 3.366" Face Width; Rough Bore; 4.88" Outside Diameter; 4.934" Pitch Diameter; No Keyway; No Bushing; Yes Minimum Plain Bore

Roller Chain Sprocket; 12B-1 Chain; 31 Teeth; 1 Row of Teeth; No Hardened Teeth; 198.78MM Outside Diameter; 188.3MM Pitch Diameter; A-No Hub; Rough Bore Mount; No Bushing; 19.05MM Chain Pitch; ISO Roller Chain; No Keyway; Steel Material

Synchronous Pulley; 1-1/2" Belt Width; 1/2 Inch Belt Pitch; H Belt Style; 31 Teeth; 1.811" Face Width; Rough Bore; 4.88" Outside Diameter; 4.934" Pitch Diameter; No Keyway; No Bushing; Yes Minimum Plain Bore