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When a worn or mismatched sprocket causes chain skip, accelerated wear, or unexpected downtime, the fix starts with the right tooth profile and pitch match. Whether you're a mechanical engineer specifying a conveyor rebuild, a fabricator building a custom drive system, or a DIY machinist replacing a failed component, these #80 flat chain drive sprockets are engineered to drop in and perform without compromise.
Each sprocket in this series features a flat-plate body machined to a 1-inch (25.4 mm) pitch, matching the ANSI #80 / ISO 16A roller chain standard. Tooth counts span from 10T to 30T, covering a wide range of speed-reduction and torque-multiplication ratios. The bore and hub dimensions vary by tooth count — see variant options for exact measurements on your selected size.
Typical applications include industrial conveyor drives, agricultural power transmission, go-kart and mini-bike final drives, and custom chain-driven machinery where a reliable #80 16A roller chain sprocket replacement is required. Long-tail use cases include low-speed high-torque reduction drives, multi-stage chain drive systems, and retrofit upgrades on legacy conveyor equipment.
Machined to a precise 1-inch (25.4 mm) pitch, these sprockets engage #80 and 16A roller chain with zero slop, reducing chain wear and extending drivetrain service life.
Choose from 21 tooth-count variants spanning 10T through 30T to dial in your exact speed ratio or torque requirement — all from a single product listing.
The flat sprocket profile keeps weight low and simplifies alignment in tight drive housings, making installation straightforward on both new builds and retrofit applications.
Each sprocket is bored to accept a standard shaft diameter appropriate for its tooth count — see variant options for bore size. Keyway and set-screw configurations available on select sizes.
Surface treatment provides resistance to rust and oxidation in typical workshop and light industrial environments, keeping the sprocket serviceable through extended duty cycles.
Tooth profile and pitch circle dimensions conform to ANSI B29.1 standards, ensuring these sprockets serve as direct replacements for OEM #80 sprockets without custom machining.
| Chain Standard | ANSI #80 / ISO 16A |
|---|---|
| Chain Pitch | 1" (25.4 mm) |
| Tooth Count Options | 10T, 11T, 12T, 13T, 14T, 15T, 16T, 17T, 18T, 19T, 20T, 21T, 22T, 23T, 24T, 25T, 26T, 27T, 28T, 29T, 30T |
| Sprocket Type | Flat (Type A — no hub) |
| Bore Diameter | See variant options |
| Outer Diameter | See variant options |
| Hub Projection | See variant options |
| Material | Carbon steel |
| Surface Finish | See variant options |
| Keyway | See variant options |
| Set Screw | See variant options |
| Weight | See variant options |
Tooth count determines your drive ratio. Divide the driven sprocket teeth by the driver sprocket teeth to get the reduction ratio. For example, a 10T driver paired with a 30T driven sprocket gives a 3:1 reduction — tripling torque while reducing output speed to one-third of input speed. Select a tooth count that achieves your target ratio while keeping chain wrap on the small sprocket above 120° for reliable engagement.
Yes. ANSI #80 and ISO 16A are functionally equivalent standards — both specify a 1-inch (25.4 mm) pitch with matching roller diameter and inner link width. These sprockets are machined to that shared pitch geometry and will engage either chain designation without modification.
The sprockets are manufactured from carbon steel with a surface treatment applied to resist rust and oxidation under normal workshop and light industrial conditions. For wet, washdown, or chemically aggressive environments, consider pairing with a stainless-steel #80 chain or applying additional corrosion protection after installation.
Bore diameter varies by tooth count and is listed in the variant options on this page. Select your desired tooth count from the dropdown to view the corresponding bore size. If you need a custom bore diameter, the sprocket can typically be re-bored by a local machine shop to your shaft specification.
Yes. The tooth profile and pitch circle dimensions conform to ANSI B29.1 standards, which govern #80 roller chain sprocket geometry. This means they serve as drop-in replacements for any OEM sprocket of the same tooth count and bore size without requiring custom machining or adapter hardware.
Yes — #80 chain drive sprockets are widely used across go-karts, mini-bikes, agricultural equipment, and industrial conveyor systems. The 10T–30T range covers the most common final-drive and intermediate-drive ratios for these applications. Verify that your existing chain is ANSI #80 or ISO 16A pitch before ordering.
Keyway and set-screw availability depends on the specific tooth-count variant. Please refer to the variant detail or contact us to confirm the hub configuration for your selected size before ordering.
