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When a worn or mismatched sprocket causes chain skip, vibration, or premature wear, the entire drivetrain suffers — and so does your project timeline. Whether you're a maker building a custom conveyor, a hobbyist upgrading a go-kart, or a maintenance tech replacing worn drive components, these 1/4" pitch roller chain sprockets give you the dimensional accuracy and material integrity needed for reliable power transmission.
Each sprocket is machined from 45# medium-carbon steel and finished with a blackening (oxide) treatment for corrosion resistance. The tooth count ranges from 24 to 30 teeth, with bore diameters available in 8 mm (0.31 in), 10 mm (0.39 in), 12 mm (0.47 in), 14 mm (0.55 in), 15 mm (0.59 in), and 16 mm (0.63 in). Overall sprocket outer diameter varies by tooth count, typically in the range of 30–50 mm (1.18–1.97 in).
These roller chain sprockets are well-suited for light-duty conveyor systems requiring precise chain engagement, small-format power transmission builds such as motorized carts and DIY robotics, and replacement applications on agricultural or workshop machinery using 1/4" pitch chain drives.
Machined from 45# medium-carbon steel for a balance of machinability, toughness, and wear resistance — suitable for sustained rotational loads in light-to-medium duty applications.
The blackening surface treatment provides a layer of corrosion resistance and reduces light reflection — practical for both indoor workshop environments and moderately humid conditions.
Five tooth-count options (24, 25, 26, 28, 30) let you dial in the exact gear ratio your drivetrain requires, whether you need higher torque or faster output speed.
Available in 8 mm, 10 mm, 12 mm, 14 mm, 15 mm, and 16 mm bore diameters to fit a wide range of shaft sizes without custom machining.
Order 1, 3, 5, or 10 pieces per pack — ideal for single-unit replacements, small project builds, or stocking spare parts for ongoing maintenance.
Tooth geometry is machined to match standard 1/4" (6.35 mm) pitch roller chain, ensuring smooth engagement, reduced noise, and consistent chain seating under load.
| Chain Pitch | 1/4" (6.35 mm) |
|---|---|
| Tooth Count Options | 24, 25, 26, 28, 30 Teeth |
| Bore Diameter Options | 8 mm / 10 mm / 12 mm / 14 mm / 15 mm / 16 mm |
| Material | 45# Medium-Carbon Steel |
| Surface Treatment | Blackening (Oxide Finish) |
| Outer Diameter (approx.) | See variant options (varies by tooth count, typically 30–50 mm) |
| Hub Style | See variant options |
| Keyway | See variant options |
| Pack Quantity | 1 Pcs / 3 Pcs / 5 Pcs / 10 Pcs |
| Compatible Chain Standard | 1/4" Pitch Roller Chain |
| Application | Light-to-medium duty power transmission, conveyors, DIY drives |
| Finish Color | Matte Black (Blackened) |
The tooth count determines your drive ratio. A smaller sprocket on the drive shaft paired with a larger sprocket on the driven shaft increases torque and reduces speed. For example, a 24-tooth drive sprocket paired with a 30-tooth driven sprocket gives a reduction ratio of approximately 1.25:1. Calculate your required ratio based on your motor RPM and desired output speed, then select tooth counts accordingly.
Measure your shaft diameter precisely with a caliper before ordering. The bore must match your shaft — available options are 8 mm, 10 mm, 12 mm, 14 mm, 15 mm, and 16 mm. If your shaft has a keyway, confirm whether the sprocket bore accommodates one; contact us to confirm keyway availability for your specific variant.
These sprockets are designed exclusively for 1/4" (6.35 mm) pitch roller chain. Using a chain with a different pitch — such as 3/8" or 1/2" — will result in poor engagement, accelerated wear, and potential chain derailment. Always verify your chain's pitch marking before purchasing.
The sprockets are machined from 45# medium-carbon steel, which offers a tensile strength typically in the range of 600–750 MPa after standard heat treatment. They are suited for light-to-medium duty applications. For heavy industrial loads or high-cycle fatigue environments, consult your application's torque and load specifications to confirm suitability.
The blackening (oxide) finish provides a moderate level of corrosion resistance suitable for dry indoor environments and low-humidity conditions. It is not a substitute for galvanizing or stainless steel in wet or outdoor environments. For extended protection, applying a light machine oil or chain lubricant to the sprocket surface is recommended.
Yes — 1/4" pitch sprockets are commonly used in small motorized vehicles, go-karts, and motorized bicycle builds where compact, lightweight chain drives are required. Confirm that your chain pitch is 1/4" (6.35 mm) and that the bore diameter matches your axle or motor shaft before ordering.
All pack sizes contain the same sprocket — the difference is quantity per order. Single-piece (1 Pcs) orders are ideal for direct replacements or prototyping. Multi-piece packs (3, 5, or 10 Pcs) offer a lower per-unit cost and are practical for building multiple assemblies or keeping spares on hand for maintenance.
