Specification Brand : TSUBAKI BulletPoint : Category: Power Transmission -- Sheaves and Pulleys BulletPoint1 : Single strand sprocket with one set of teeth around the circumference for applications where a single chain can support the torque and load BulletPoint2 : Pitch of 1/2 inch for size 40 chains BulletPoint3 : Ready-to-install finished bore with a wide hub on one side BulletPoint4 : Type B sprocket with a hub projection on one side to accommodate various types of bushings to help prevent sprocket from slipping on the shaft BulletPoint5 : Sprocket teeth help prevent slipping and binding to avoid power loss in assemblies Color : black Department : Unisex Adult ExternallyAssignedProductIdentifier1 : 097039324566 ExternallyAssignedProductIdentifier2 : 0097039324566 ExternallyAssignedProductIdentifier3 : 00097039324566 ItemName : Tsubaki 40B21F-1D Finished Bore Sprocket, Single Strand, Inch, #20 ANSI No., 1/2" Pitch, 21 Teeth, 1-1/4" Bore ItemPackageDimensions_Height : 3.302 centimeters ItemPackageDimensions_Length : 12.192 centimeters ItemPackageDimensions_Width : 11.43 centimeters ItemPackageQuantity : 1 ItemShape : Rectangular ItemTypeKeyword : roller-chain-sprockets Manufacturer : Tsubaki Material : Alloy Steel Material1 : High Carbon Steel Material2 : Carbon Steel ModelNumber : 10T/6mm Bore NumberOfItems : 1 NumberOfRows : 1 NumberOfTeeth : 21 PackageLevel : unit PartNumber : 40B21F-1D ProductDescription : Chain Sprockets are normally mounted in a fixed position on a fixed shaft. Keyway with 2pcs Set Screws at 90 degrees. The shaft can be fixed well, which is convenient to use. The chain sprocket should not rotate at a greater speed than is allowable for drive sprockets of the same size. Every roller chain sprocket comes with strong teeth that can latch onto the chain. It is suggested that chain sprockets have at least three teeth in mesh with the chain. The product is made of carbon steel, the tooth part high temperature quenching heat treatment, high hardness, wear resistance, long service life, easy to use. Fully black oxide coated, rust resistance. Widely used in milling machine, drilling machine or other machinery transmission occasions.