Transmissions
Chain Sprockets
Pilot Bore Sprockets
1/2inch Pitch (08B1, 08B2, 08B3) Pilot Bore Sprockets
08B1 - 1/2inch Simplex Chain Sprockets
Quick Code: BB-20220
4SR21 Pilot Bore Sprocket 08B1
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Product Specification
Boss Dia
68mm
Number of Teeth
21
Outside Dia
89.7mm
Overall Length
28mm
Pilot Bore Size
12mm
Pitch
1/2inch
Reference
4SR21
Brand
Medway
Quick Order Code
BB-20220
Product Description
The 4SR21 Pilot Bore Sprocket 08B1 is a premium 08B1 British standard roller chain sprocket manufactured by Medway, designed for reliable power transmission in industrial and mechanical applications.
Key Specifications:
- 08B1 British standard roller chain sprocket
- 1/2 inch pitch x 21 teeth
- Boss diameter: 68mm
- Outside diameter: 89.7mm
- Overall length: 28mm
- Pilot bore size: 12mm
Product Benefits:
- Engineered to British standards for consistent performance and compatibility
- 21-tooth configuration provides optimal speed and torque balance for mid-range applications
- Compact design with 89.7mm outside diameter makes it ideal for space-constrained installations
- 12mm pilot bore ensures secure mounting on standard shafts
- Durable construction suitable for continuous industrial operation
Typical Applications:
This sprocket is suitable for use in conveyor systems, machinery drives, agricultural equipment, and general industrial power transmission applications where reliable chain drive performance is essential.
