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When a single-strand sprocket simply cannot handle the torque demands of your conveyor, gearbox, or industrial drive system, you need a duplex sprocket engineered for the job. Makers, maintenance engineers, and machine builders working with #50 (10A) roller chain know that mismatched or worn sprockets cause chain skip, accelerated wear, and costly downtime — this duplex sprocket is the direct-fit solution.
This duplex sprocket is machined for #50 (10A) roller chain with a 5/8 inch (15.875 mm) pitch. Available in two styles — With Steps (flanged hub) and Without Steps (plain hub) — and in tooth counts ranging from 11T to 50T, covering a wide range of speed-ratio requirements. Hub bore and keyway dimensions vary by tooth count; see variant options for exact bore specifications.
Typical applications include agricultural machinery duplex chain drives, industrial conveyor two-strand sprocket replacements, gearbox output shaft sprocket upgrades for #50 chain, and DIY power transmission projects requiring a matched duplex sprocket set.
| Chain Standard | ANSI #50 / ISO 10A |
|---|---|
| Chain Type | Duplex (Two-Strand) Roller Chain |
| Pitch | 5/8 inch (15.875 mm) |
| Tooth Count | 11T – 50T (see variant options) |
| Style | With Steps (flanged hub) / Without Steps (plain hub) |
| Bore Diameter | See variant options |
| Hub Diameter | See variant options |
| Overall Width | See variant options |
| Material | Carbon steel |
| Finish | Surface treated (oxidation resistant) |
| Keyway | See variant options |
| Set Screw | See variant options |
The tooth count determines your drive ratio. Divide the driven sprocket teeth by the driver sprocket teeth to get the reduction ratio. For example, a 12T driver paired with a 24T driven sprocket gives a 2:1 reduction. Select the tooth count that achieves your target output speed or torque based on your motor RPM and load requirements.
"With Steps" refers to a flanged or stepped hub profile that helps keep the duplex chain laterally aligned on the sprocket, which is useful in applications where chain wander is a concern. "Without Steps" is a plain hub profile suited for compact drive arrangements where axial space is limited or where the chain alignment is controlled by other means such as guide rails.
This sprocket is designed for ANSI #50 / ISO 10A duplex (two-strand) roller chain with a 5/8 inch (15.875 mm) pitch. It will not correctly engage a simplex (single-strand) #50 chain or chains of a different pitch. Confirm your chain is a duplex type before ordering.
Measure your shaft diameter with a caliper. The bore diameter for each tooth count variant is listed in the variant details. If you need a custom bore size, the sprocket can typically be re-bored by a local machine shop. Always confirm the bore, keyway width, and set screw position match your shaft before installation.
The load capacity depends on the tooth count, chain speed, and lubrication conditions. As a duplex sprocket, it carries approximately twice the working load of a comparable simplex sprocket. For exact working load limits, refer to the ANSI #50 chain manufacturer's load tables and apply an appropriate service factor for your application type (smooth, moderate shock, or heavy shock).
The sprocket has a surface treatment that provides resistance to light oxidation in typical workshop and indoor industrial environments. For outdoor, washdown, or high-humidity applications, we recommend applying a chain lubricant or anti-corrosion coating regularly. For highly corrosive environments, contact us to discuss material options.
Yes. This sprocket conforms to standard ANSI #50 / ISO 10A duplex sprocket dimensions, making it suitable as a drop-in replacement on most standard industrial machinery. Verify the tooth count, bore diameter, hub style (with or without steps), and overall width match your existing sprocket before installation.
