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When a worn or mismatched sprocket is costing you chain life and drivetrain efficiency, the fix starts with the right tooth profile. Makers, fabricators, and mechanical hobbyists working with ANSI #50 roller chain need a sprocket that holds tight tolerances across every tooth — whether they're building a go-kart, a conveyor, a power-transmission rig, or a custom automation project.
These step drive sprockets are machined from carbon steel and finished to ANSI #50 / ISO 10A standards. The pitch is 15.875 mm (5/8 in), matching the standard #50 chain link spacing exactly. Tooth counts run from 10T through 60T, covering a wide range of speed-ratio and torque requirements. Bore dimensions vary by tooth count — see variant options for exact bore and hub specs.
Typical use cases include go-kart and mini-bike final drives, industrial conveyor drive stations, DIY power-transmission builds requiring a #50 chain step-drive sprocket replacement, and custom gear-reduction assemblies where a specific tooth count is needed to hit a target RPM ratio.
Available from 10T to 60T in a single product listing, letting you dial in your exact speed ratio without sourcing from multiple suppliers.
15.875 mm pitch machined to standard tolerances ensures smooth chain engagement and minimizes wear on both the sprocket and chain.
Machined from carbon steel for the strength and wear resistance needed in continuous-duty drivetrain applications.
The stepped hub profile provides a positive axle seating surface, reducing lateral movement and keeping the chain aligned under load.
Suited for go-karts, mini-bikes, conveyors, power-transmission rigs, and custom automation builds wherever a #50 chain drive is used.
Sold individually (1 pcs per order) so you can replace exactly the sprocket you need without buying in bulk.
| Chain Standard | ANSI #50 / ISO 10A |
|---|---|
| Chain Pitch | 15.875 mm (5/8 in) |
| Chain Inner Width | 9.53 mm (3/8 in) |
| Tooth Count Range | 10T – 60T (select variant) |
| Material | Carbon Steel |
| Hub Style | Step Drive |
| Bore Diameter | See variant options |
| Hub Diameter | See variant options |
| Hub Length | See variant options |
| Outer Diameter | See variant options |
| Surface Finish | See variant options |
| Quantity per Order | 1 pcs |
Your tooth count determines the drive ratio between your driver and driven sprocket. Divide the driven sprocket teeth by the driver sprocket teeth to get the reduction ratio. For example, a 10T driver paired with a 40T driven sprocket gives a 4:1 reduction. Match your target output RPM and torque to select the correct combination.
Yes — these sprockets are machined to ANSI #50 / ISO 10A specifications with a 15.875 mm (5/8 in) pitch. They are compatible with any standard #50 roller chain. They are not compatible with #40 (12.7 mm pitch) or #60 (19.05 mm pitch) chains.
Bore diameter varies by tooth count. Please refer to the variant options or contact us to confirm the bore size for your specific tooth count before ordering. If you need a custom bore, a machine shop can typically enlarge a standard bore to your shaft diameter.
Yes. Carbon steel construction provides the tensile strength and surface hardness needed for go-kart final drives and mini-bike applications running standard #50 chain. Ensure your chain tension and alignment are correctly set to maximize sprocket service life.
Carbon steel sprockets benefit from regular lubrication with a chain-compatible oil or grease. For outdoor or high-moisture environments, applying a rust-inhibiting lubricant and keeping the chain properly tensioned will significantly extend service life. If corrosion resistance is a primary requirement, consider a stainless steel or zinc-plated alternative.
Yes. These step drive sprockets are well-suited for light-to-medium duty conveyor drive stations using #50 roller chain. Confirm that your conveyor's shaft diameter matches the available bore size for your chosen tooth count before ordering.
A step drive sprocket features a stepped hub profile — the hub diameter changes in a stepped fashion rather than being a simple flat plate or uniform cylinder. This stepped geometry provides a positive axle seating surface that helps resist lateral chain movement and keeps the sprocket centered on the shaft under load.
