Durable 04C Chain Sprocket — precision 45# steel for reliable motor and chain drive performance. This singlepiece sprocket is made to fit standard 04C roller chain and is offered with a bore size of 8mm (bore options 6mm–16mm available), making it a versatile replacement or upgrade for small motors and industrial chain drives. Key benefits Precise fit for consistent power transfer: Tooth profile matched to 04C chain reduces slippage and vibration for smoother operation. Built for durability: Machined from 45# steel and heattreated for improved wear resistance and long service life under normal operating conditions. Easy to install and : Standard bore sizing and setscrew / keyway compatibility (depending on chosen bore option) make installation straightforward on compatible motor shafts. Versatile sizing options: Tooth counts available in the 10–23 range to match different gear ratios; this listing is for a 21tooth unit, size 8mm. Product highlights and attributes Chain type: 04C (compatible with standard 04C roller chain) Tooth count: 10–23 teeth available; this unit: 21 teeth Material: 45# steel (heattreated for wear resistance) Bore range: 6mm–16mm (this listing: Size 8mm) Quantity: 1 piece Application: Industrial sprocket wheel for motor chain drive systems Color (as listed): 21 Teeth Functionality and performance Transfers torque efficiently between motor and driven components when paired with 04C chain. Solid construction minimizes tooth deformation and maintains consistent chain engagement under load. Suitable for moderatespeed chain drive systems typical in light industrial and hobbyist machinery. Typical use cases Replacing a worn sprocket on a small conveyor or lightduty industrial feeder that uses 04C chain. Power transmission in motordriven equipment such as small gearboxes, hobby CNC machines, or automated gates where a 21tooth ratio and 8mm bore are required. DIY and prototyping projects (robotics, gokarts, custom machinery) requiring a reliable 04C sprocket with a robust steel construction. Installation and maintenance tips Confirm chain size is 04C and tooth count matches system requirements before installing. Verify shaft diameter matches the bore (this unit: 8mm). If using a different bore option, select the correct size from 6mm–16mm. Use proper fastening (set screws, keyways, washers) and ensure correct axial positioning to prevent misalignment. Lubricate chain regularly and inspect sprocket teeth for wear to maintain smooth operation and prolong service life. Specifications (as listed) Model/Type: 04C Chain Gear Tooth options: 10–23 Teeth (this unit: 21 Teeth) Size (bore for this unit): 8mm Bore available range: 6mm–16mm Material: 45# Steel Quantity: 1Pcs Application: Industrial sprocket wheel / motor chain drive this single 45# steel 04C sprocket when you need a precise, durable replacement or upgrade for 04C chaindriven motors and light industrial machinery.