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When a worn or mismatched sprocket causes chain skipping, vibration, or premature wear on your drive system, finding an exact-fit 10A roller chain drive sprocket is the fastest fix. Whether you are a hobbyist rebuilding a go-kart, a workshop technician maintaining a conveyor line, or a maker designing a custom power-transmission rig, this flat chain gear sprocket wheel gives you the precise tooth count you need without compromise.
Each sprocket is machined to suit standard #50 (10A) roller chain with a 15.875 mm (5/8 in) pitch. The flat-plate body keeps the profile compact and lightweight. Tooth counts range from 21T through 30T, covering a wide spread of gear ratios in a single product listing — select the exact tooth count from the variant options above. Bore diameter and hub dimensions vary by tooth count; see variant options for confirmed measurements.
Typical applications include go-kart and mini-bike final drives, small agricultural equipment chain drives, DIY conveyor and indexing tables, and motorized project builds requiring a #50 chain sprocket replacement. The flat-body design also suits compact gearbox output shafts where a hubbed sprocket would foul adjacent components.
| Chain Standard | #50 / 10A (ANSI / ISO) |
|---|---|
| Chain Pitch | 15.875 mm (5/8 in) |
| Tooth Count (T) | 21T / 22T / 23T / 24T / 25T / 26T / 27T / 28T / 29T / 30T |
| Body Style | Flat plate (no hub) |
| Bore Diameter | See variant options |
| Outer Diameter | See variant options |
| Plate Thickness | See variant options |
| Material | See variant options |
| Surface Finish | See variant options |
| Quantity per Pack | 1 pcs |
This sprocket is designed for standard #50 / 10A roller chain with a 15.875 mm (5/8 in) pitch. It will not fit #40, #60, or other chain sizes. Always confirm the chain pitch on your existing drive before ordering.
The tooth count determines your drive ratio. Divide the driven sprocket teeth by the drive sprocket teeth to get the ratio. For example, pairing a 10T drive sprocket with a 30T driven sprocket gives a 3:1 reduction. Select the tooth count from the Size variant dropdown above that matches your target ratio.
Bore diameter varies by tooth count. Please check the variant detail or contact us to confirm the bore size for your selected tooth count before ordering. If your shaft diameter differs, a machinist can typically bore the sprocket to a custom size.
Yes. The flat-plate 10A sprocket is a common choice for go-kart and mini-bike final drives running #50 chain. For high-torque or racing applications, verify the material specification for your selected variant and ensure the bore-to-shaft fit is correct with a proper key or set-screw retention.
The sprocket receives a surface treatment that provides resistance to light moisture and workshop environments. For prolonged outdoor or wet-area use, we recommend periodic lubrication of both the chain and sprocket teeth to extend service life.
Absolutely. The flat-plate body and standard #50 pitch make this sprocket well-suited for light-duty conveyor drives and DIY indexing tables. Confirm the shaft bore and ensure the sprocket is secured with an appropriate key, set screw, or retaining method for your application.
Each tooth count produces a different outer diameter and gear ratio. Higher tooth counts (e.g., 30T) result in a larger sprocket diameter and a lower output speed for a given input speed, while lower tooth counts (e.g., 21T) produce a smaller sprocket and higher output speed. Choose based on the speed and torque requirements of your drive system.
