uxcell #25 Chain Roller Sprocket, 12mm Bore 1/4" Pitch 12 Tooth Single Strand Chain Sprocket, C45 Carbon Steel 25 Roller Chain Sprocket with Set Screws for ISO 04C Chain,

Additional Details from the Manufacturer

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• Specifications: Number of Teeth: 12, Outside Diameter: 27.5mm / 1.08-inch, Bump Width: 9.5mm / 0.37-inch, Total Width: 15mm / 0.59-inch, Bore Diameter: 12mm / 0.47-inch, Pitch: 1/4-inch / 6.35mm, Tooth Width: 3mm / 0.12-inch, Set Screw Size: M5, 2 x Chain Sprocket, 4 x Set Screws
• Chain Sprockets are normally mounted in a fixed position on a fixed shaft. Round hole 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 c45 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.