Transmissions
Chain Sprockets
Pilot Bore Sprockets
1/2inch Pitch (08B1, 08B2, 08B3) Pilot Bore Sprockets
08B1 - 1/2inch Simplex Chain Sprockets
Quick Code: BB-20238
4SR39 Pilot Bore Sprocket 08B1
08B1-39 Simplex Chain Sprocket
The 4SR39 is a precision-engineered pilot bore sprocket designed for reliable power transmission in a wide range of industrial and mechanical applications. Built to British standard specifications, this sprocket delivers consistent performance in chain drive systems.
- 08B1 British standard roller chain sprocket
- 1/2 inch pitch x 39 teeth
- Boss diameter: 90mm
- Outside diameter: 162.7mm
- Pilot bore size: 16mm
- Overall length: 35mm
- Manufactured by Medway to high quality standards
Applications:
This 39-tooth sprocket is ideal for moderate-speed drive systems where balanced torque and speed characteristics are required. The larger tooth count makes it particularly suitable for applications requiring higher speed ratios. Commonly used in:
- Industrial machinery and equipment
- Conveyor systems
- Agricultural applications
- General mechanical power transmission
- Drive systems requiring precise speed control
The 16mm pilot bore accommodates larger shaft sizes, while the substantial 90mm boss diameter ensures robust compatibility with a variety of mounting configurations. The 162.7mm outside diameter and 35mm length provide optimal chain engagement and superior durability for demanding operational environments.



