Specification Brand : Martin BulletPoint1 : For use with series 50 chain, 5/8” pitch for driver or driven sprocket needs BulletPoint2 : Type BS sprocket with two setscrews and a keyway offers a stable and secure attachment to the shaft BulletPoint3 : Shaft diameter size from 5/8” to 1-15/16” for a variety of applications BulletPoint4 : Varying numbers of teeth, hub sizes, and stock bore sizes offer application flexibility BulletPoint5 : High carbon steel for strength and durability Color : black ExternallyAssignedProductIdentifier1 : 697950010533 ExternallyAssignedProductIdentifier2 : 0697950010533 ExternallyAssignedProductIdentifier3 : 00662289158652 ItemName : Martin Roller Chain Sprocket, Bored-to-Size, Type B Hub, Single Strand, 50 Chain Size, 0.625" Pitch, 15 Teeth, 1.25" Bore Dia., 3.315" OD, 2.375" Hub Dia., 0.343" Width ItemPackageDimensions_Height : 2.794 centimeters ItemPackageDimensions_Length : 9.144 centimeters ItemPackageDimensions_Width : 9.398 centimeters ItemPackageQuantity : 1 ItemTypeKeyword : roller-chain-sprockets Manufacturer : MARTIN Material : Carbon Steel ModelNumber : 50BS15 1 1/4 NumberOfItems : 1 NumberOfRows : 1 NumberOfTeeth : 15 PartNumber : 50BS15 1 1/4 ProductDescription : Sprocket and chain must match each other to normal use, choose sprocket, need to consider the following factors: 1.style of sprocket Type A (Flat sprocket, no hubs) Type B (1 Hub) Type C (2 Hubs) 2.Number of Teeth needed. 3.Sprocket bore size. If you choose the sprocket according to the chain, you also need to confirm the pitch of the chain and the diameter of the chain roller. #50 SPROCKET SPECIFICATIONS Hub Style:B Type Teeth:18 Pitch Size :5/8" Bore :5/8" Keyway:3/16"x3/32" Material : AISI 1045 Medium Carbon Steel Chain:#50 Chain Total thickness : 1.18" Outside Diameter:3.89" Hub Diameter: 2.36" ProductSiteLaunchDate : 2010-10-01T00:00:01-07:00 Size : 50 Style : Bored-to-Size SupplierDeclaredDgHzRegulation : not_applicable UnspscCode : 31171900