DS20A21 Sprocket
- Custom bore sizes are available. Contact us if you need a specific bore size or machining requirement.
- Images are for reference only. Actual product appearance may vary based on size, bore, keyway, hub style, or manufacturer.
DS20A21 Sprocket Upgrade Options
- Heat-Treated Teeth
- Custom Bore Sizes (With Key-way & Set-Screws)
- Idler Sprocket Configuration
- Black Oxide Coating
DS20A21 Sprocket Dimensions

- Sprocket Size: DS20A21
- Tooth Count: 21
- Outside Diameter: 229.62mm
- Pitch Diameter: 213.03mm
- Sprocket Type: A
- Stock Bore: 32mm
- Maximum Recommended Bore: 133.35mm
- Dimension (L): 68.3mm
- Dimension (C): 49.8mm
- Dimension (E): 177.0mm
- Dimension (F): 18.5mm
- Sprocket Weight: 13.18 kG
Besides the metric double single sprocket, we also supply 20B roller chain, electric motors, gear reducers, and a plethora of roller chain accessories. For more information or to get a quote please contact us and we will be happy to assist you.
- Sprocket Size: DS20A21
- Tooth Count: 21
- Outside Diameter: 229.62mm
- Pitch Diameter: 213.03mm
- Sprocket Type: A
- Stock Bore: 32mm
- Maximum Recommended Bore: 133.35mm
- Dimension (L): 68.3mm
- Dimension (C): 49.8mm
- Dimension (E): 177.0mm
- Dimension (F): 18.5mm
- Sprocket Weight: 13.18 kG