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When a slipping or mismatched sprocket brings your build to a halt, you need a replacement you can trust to mesh cleanly and hold up under load. Whether you're a maker retrofitting a go-kart, a hobbyist assembling a conveyor, or a technician maintaining light industrial equipment, the right 10A roller chain drive sprocket is the difference between a smooth drivetrain and constant downtime.
This flat chain gear sprocket wheel is machined to suit ANSI/ISO 10A (5/8" pitch) roller chain. Available in tooth counts from 31T to 40T, each sprocket is manufactured from carbon steel with a natural or lightly finished surface, offering a balance of toughness and machinability. Outer diameters range approximately 65–85 mm (2.56"–3.35") depending on tooth count, with a bore diameter that can be confirmed per variant.
Typical applications include go-kart rear axle drives, small conveyor belt systems, DIY electric bike or scooter chain drives, and light-duty agricultural or workshop machinery — anywhere a 10A standard roller chain is already in use and a specific gear ratio is needed.
| Chain Standard | ANSI/ISO 10A |
|---|---|
| Chain Pitch | 15.875 mm (5/8") |
| Roller Diameter | 10.16 mm (0.400") |
| Tooth Count (T) | 31T / 32T / 33T / 34T / 35T / 36T / 37T / 38T / 39T / 40T |
| Outer Diameter | See variant options |
| Bore Diameter | See variant options |
| Hub Style | Flat (no hub) |
| Material | Carbon Steel |
| Surface Finish | See variant options |
| Quantity per Order | 1 pcs |
| Weight | See variant options |
Tooth count determines your gear ratio. Divide the driven sprocket teeth by the drive sprocket teeth to get the ratio. A higher tooth count on the driven side gives more torque and lower speed; a lower count gives higher speed. For go-karts, a common rear sprocket range is 31T–40T paired with a smaller engine sprocket. Match your desired ratio to your engine RPM and target wheel speed.
This sprocket is designed for ANSI/ISO 10A standard roller chain, which has a 5/8" (15.875 mm) pitch and a 10.16 mm (0.400") roller diameter. Do not use with 08B, 12A, or other pitch chains — mismatched pitch will cause rapid wear and chain skipping.
The bore diameter varies by variant — please check the specific size listing for the bore spec. If you need a custom bore, a machinist can typically bore out a carbon steel sprocket to your shaft diameter, provided the wall thickness allows it. Contact us to confirm the stock bore before ordering if you have a specific shaft size requirement.
Carbon steel sprockets offer solid mechanical strength but have moderate corrosion resistance. For outdoor or high-moisture environments, regular lubrication with chain oil is recommended to prevent surface rust. If your application requires higher corrosion resistance, consider stainless steel alternatives or apply a protective coating after installation.
Yes — this flat sprocket can be used on either the drive (input) or driven (output) side of a chain drive system, as long as the bore fits your shaft and the tooth count gives you the gear ratio you need. Ensure both sprockets are aligned in the same plane to prevent chain side-loading and premature wear.
A flat sprocket (like this one) has a uniform plate thickness with no raised hub, making it lighter and more compact. It is typically secured to a shaft using a keyway, set screw, or custom hub adapter. A hubbed sprocket has an extended cylindrical boss that provides more shaft engagement and is easier to secure with a set screw alone. Choose flat when space is tight or weight matters; choose hubbed when you need a more secure shaft grip without additional hardware.
No — this listing is for the sprocket only (1 piece). Chain, keys, set screws, and hub adapters are not included. If you need matching 10A roller chain or connecting links, please search our store for compatible chain products.
