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When a worn or mismatched sprocket causes chain skip, premature wear, or unexpected downtime, the fix starts with a dimensionally accurate replacement. Makers, machine builders, and maintenance technicians who rely on 06B roller chain drive systems need a flat sprocket that holds tight tolerances across every tooth — whether they're running a conveyor line, a reduction drive, or a custom power transmission build.
These 06B chain drive flat sprockets are machined to suit standard 06B roller chain with a 9.525 mm (3/8 in) pitch. Available in tooth counts from 30T to 42T, each sprocket is manufactured from carbon steel with a natural or lightly finished surface. Bore dimensions and hub details vary by size — see variant options for exact specifications per tooth count.
Typical applications include light-duty conveyor drives, agricultural equipment reduction stages, DIY go-kart and mini-bike builds, and compact industrial automation setups where a 06B roller chain sprocket replacement or custom 9.525mm pitch drive assembly is required.
| Chain Standard | ISO 606 / BS 06B-1 |
|---|---|
| Chain Pitch | 9.525 mm (3/8 in) |
| Roller Diameter (chain) | 5.72 mm (0.225 in) |
| Tooth Count Range | 30T, 31T, 32T, 33T, 34T, 35T, 36T, 37T, 38T, 39T, 40T, 41T, 42T |
| Sprocket Type | Flat (no hub flange) |
| Material | Carbon Steel |
| Surface Finish | See variant options |
| Bore Diameter | See variant options |
| Outer Diameter | See variant options |
| Hub Thickness | See variant options |
| Keyway | See variant options |
| Packing Quantity | 1 pcs / 10 pcs |
These sprockets are designed for standard 06B-1 roller chain conforming to ISO 606 and British Standard BS 06B-1. The chain pitch is 9.525 mm (3/8 in) with a 5.72 mm roller diameter. Do not use with 40 ANSI or other pitch chains — the tooth profile will not match.
Divide the driver sprocket tooth count by the driven sprocket tooth count to get your reduction ratio. For example, a 15T driver paired with a 30T driven sprocket gives a 2:1 reduction. A higher tooth count on the driven sprocket increases torque and reduces output speed. Select your tooth count above based on your target ratio and available shaft spacing.
Bore diameter varies by tooth count — please see the variant options or contact us to confirm the as-supplied bore for your selected size. Carbon steel sprockets can typically be re-bored or broached by a machine shop to accept a larger shaft or keyway, provided sufficient wall thickness remains after machining.
Carbon steel construction provides adequate strength for light-to-moderate continuous-duty applications such as conveyor drives, agricultural equipment, and DIY power transmission builds operating within the rated load limits of 06B-1 chain. For heavy shock loads or high-cycle industrial environments, consult the chain manufacturer's load tables and consider hardened or case-hardened sprockets.
Carbon steel has moderate corrosion resistance. For outdoor or humid environments, apply a light coat of chain lubricant or anti-rust oil to the sprocket surface during installation and maintain regular lubrication intervals. For highly corrosive environments, consider stainless steel sprocket alternatives.
Both options ship the same sprocket — the 10 pcs pack simply contains ten identical sprockets at a lower per-unit price, making it suitable for production builds, spare parts inventory, or workshop stocking. Select your preferred packing quantity in the Packing Quantity option above before adding to cart.
No. These are single-strand flat sprockets designed for 06B-1 (single-strand) roller chain only. Double-strand 06B-2 chain requires a wider, dual-row sprocket with matching strand spacing. Using a single-strand sprocket with double-strand chain will result in misalignment and accelerated wear.
