Specification Brand : Martin BulletPoint1 : For use with series 40 chain, 1/2” pitch for driver or driven sprocket applications BulletPoint2 : Type BS sprocket with hardened teeth, two setscrews, and a keyway offers a stable and secure attachment to the shaft BulletPoint3 : Shaft diameter size from 1/2 to 1-1/2” 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 BulletPoint6 : Outside Diameter: 2.17" BulletPoint7 : LTB (Length Through Bore): 7/8" BulletPoint8 : Easy Installation: Equipped with 2 set screws for a secure and hassle-free mounting process ChainType : Semi-Chisel Color : black DriveLinkCount : 12 ExternallyAssignedProductIdentifier1 : 697950159560 ExternallyAssignedProductIdentifier2 : 0697950159560 ExternallyAssignedProductIdentifier3 : 00662289139361 IncludedComponents : 2 Set Screws ItemName : Martin Roller Chain Sprocket, Hardened Teeth, Bored-to-Size, Type B Hub, Single Strand, 40 Chain Size, 0.5" Pitch, 10 Teeth, 0.5" Bore Dia., 1.839" OD, 1.25" Hub Dia., 0.284" Width ItemPackageDimensions_Height : 2.54 centimeters ItemPackageDimensions_Length : 5.08 centimeters ItemPackageDimensions_Width : 5.08 centimeters ItemPackageQuantity : 1 ItemTypeKeyword : roller-chain-sprockets Manufacturer : MARTIN Material : Carbon Steel ModelNumber : 12-35 NumberOfBoxes : 1 NumberOfItems : 1 NumberOfRows : 1 NumberOfTeeth : 10 PartNumber : 40BS10HT 1/2 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.