MARTIN SPROCKET & GEAR D28B20
MARTIN SPROCKET & GEAR
MARTIN SPROCKET & GEAR D28B20
D28B20 PART NUMBER
Stock Bore Sprocket - Metric - 28B / 1-3/4 in, B Hub, 20 Teeth, 40 mm Stock Bore, Steel Material
QTY QUOTEMARTIN SPROCKET & GEAR - MARTIN SPROCKET & GEAR D28B20
Martin metric double 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.
Tolerances meet or exceed ISO standards
Manufactured of high carbon steel
Precise machining and processes ensure consistent finish and high quality
Bores are concentric to pitch line, minimizing run out
Chain rows are parallel and precisely spaced to increase longevity of sprocket and chain
SPECIFICATIONS
| Chain Number & Pitch | 28B / 1-3/4 in |
|---|---|
| Pitch Diameter | 284.1 mm |
| Chain / Sprocket Type | Metric Roller Chain |
| Maximum Bore Diameter | 126 mm |
| Hub Outside Diameter | 178 mm |
| Tooth Width | 88 mm |
| Hub Style | B |
| Tooth Thickness | 29 mm |
| Number Of Teeth | 20 |
| Chain Roller Diameter | 27.94 mm |
| Bore Type | Reboreable |
| Chain Roller Width | 30.99 mm |
| Bore Diameter | 40 mm |
| Storage Dimension Height | 4.72 mm |
| Number Of Strands Across | 2 |
| Storage Dimension Length | 12.27 mm |
| Material | Steel |
| Storage Dimension Width | 12.27 mm |
| Length Through Bore | 120 mm |
| Surface Treatment | Protective Coating |
| Hardened Teeth | Non-Hardened Teeth |
| Manufacturer Upc Number | 697950407258 |
| Outside Diameter | 311.8 mm |
| Caliper Diameter | 256.2 mm |
| Weight | 93.738 lbs |
