Manufacturer Part Number: 40B18F-1|Sprocket Type|Finished BoreChain Pitch (Decimal Inch)|0.5000Chain Pitch (Inch)|1/2Iso Number|Pitch Diameter (Decimal Inch)|Pitch Diameter (mm)|Hub Diameter (mm)|Hub Diameter (Decimal Inch)|2.31300Chain Trade Size|40Outside Diameter (mm)|Outside Diameter (Decimal Inch - 4 Decimals)|3.1400Keyway Width|Keyway Width (Inch)|Keyway Width (Decimal Inch)|Keyway Width (mm)|Keyway Depth (mm)|Keyway Depth (Fractional Inch)|Keyway Depth (Decimal Inch)|Material|SteelBushing Series|Standards|Maximum Bore Diameter (Inch)|1Bushing Number|Minimum Bore Diameter (Inch)|1Idler Size|Minimum Bore Diameter (Decimal Inch)|1.0000Thickness (Decimal Inch - 4 Decimals)|Minimum Bore Diameter (mm)|Maximum Bore Diameter (Decimal Inch)|1.0000Maximum Bore Diameter (mm)|Number Of Teeth|18Product Service Code|3020UNSPSC Code|