On request
MARTIN SPROCKET & GEAR
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MARTIN SPROCKET & GEAR 28A21
#28A21
On request
Stock Bore Sprocket - Metric - A Style - 28B / 1-3/4 in, A Hub, 21 Teeth, 40 mm Stock Bore, Steel Material
Price on request — a consultant will confirm lead time and terms.
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MARTIN SPROCKET & GEAR — MARTIN SPROCKET & GEAR 28A21
- Metric A Plates are flat sprockets with no hub extension on either side.
- They can be altered for your application with bolt holes, custom bores, hardened teeth or special hubs welded to them.
- Tolerances meet or exceed ISO standards
- Manufactured of high carbon steel
- Precise machining and processes ensure consistent finish and high quality
Specifications
| Brand | MARTIN SPROCKET & GEAR |
| Category | STOCK BORE SPROCKETS |
| Chain number & pitch | 28B / 1-3/4 in |
| Pitch diameter | 298.2 mm |
| Chain / sprocket type | Metric Roller Chain |
| Maximum bore diameter | 256 mm |
| Hub style | A |
| Tooth width | 29 mm |
| Number of teeth | 21 |
| Tooth thickness | 29 mm |
| Bore type | Reboreable |
| Chain roller diameter | 27.94 mm |
| Bore diameter | 40 mm |
| Chain roller width | 30.99 mm |
| Number of strands across | 1 |
| Storage dimension height | 1.16 mm |
| Material | Steel |
| Storage dimension length | 12.83 mm |
| Storage dimension width | 12.83 mm |
| Bore range | 40 to 249.6 mm |
| Surface treatment | Protective Coating |
| Length through bore | 29 mm |
| Manufacturer upc number | 697950406732 |
| Hardened teeth | Non-Hardened Teeth |
| Outside diameter | 325.9 mm |
| Weight | 30.975 lbs |
| Caliper diameter | 269.5 mm |
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