On request
MARTIN SPROCKET & GEAR
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MARTIN SPROCKET & GEAR E20B21
#E20B21
On request
Stock Bore Sprocket - Metric - 20B / 1-1/4 in, B Hub, 21 Teeth, 25 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 E20B21
- Martin metric triple strand solid construction sprockets have proper spacing between chain rows.
- The sprockets are manufactured from high carbon steel.
- Martin does not stack “A” plates on multiples, but instead Martin machines teeth after the chain rows are already in place.
- These plain bore sprockets can easily be bored to a metric or standard size to fit your application.
- Keyways, set screws and harden teeth are quick alterations that can be made.
Specifications
| Brand | MARTIN SPROCKET & GEAR |
| Category | STOCK BORE SPROCKETS |
| Chain number & pitch | 20B / 1-1/4 in |
| Caliper diameter | 193.4 mm |
| Chain / sprocket type | Metric Roller Chain |
| Pitch diameter | 213 mm |
| Hub outside diameter | 140 mm |
| Maximum bore diameter | 98 mm |
| Hub style | B |
| Tooth width | 91 mm |
| Number of teeth | 21 |
| Tooth thickness | 18 mm |
| Bore type | Reboreable |
| Chain roller diameter | 19.05 mm |
| Bore diameter | 25 mm |
| Chain roller width | 19.56 mm |
| Number of strands across | 3 |
| Storage dimension height | 4.53 mm |
| Material | Steel |
| Storage dimension length | 9.2 mm |
| Number of hubs | 1 |
| Storage dimension width | 9.2 mm |
| Bore range | 32 to 92 mm |
| Surface treatment | Protective Coating |
| Length through bore | 115 mm |
| Manufacturer upc number | 697950405292 |
| Hardened teeth | Non-Hardened Teeth |
| Outside diameter | 233.7 mm |
| Weight | 52.561 lbs |
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