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Product Specification
Boss Dia
108mm
Number of Teeth
57
Outside Dia
236.4mm
Overall Length
50mm
Pitch
1/2inch
Reference
4DR57
Brand
Medway
Quick Order Code
BB-20591
Product Description

4DR57 Pilot Bore Chain Sprocket 08B2

The 4DR57 Pilot Bore Chain Sprocket 08B2 is a high-quality duplex chain sprocket engineered for reliable power transmission in demanding industrial applications. With its generous 57-tooth configuration, this sprocket is ideal for high-ratio drive systems requiring smooth operation and consistent performance.

Key Specifications

  • 08B2 British standard roller chain sprocket
  • 1/2 inch pitch x 57 teeth
  • Outside diameter: 236.4mm
  • Boss diameter: 108mm
  • Overall length: 50mm

Product Features

  • Duplex design with two rows of teeth for increased load capacity and enhanced power transmission
  • Pilot bore configuration allows for precise shaft fitting and secure installation
  • Manufactured to British standard specifications for compatibility with 1/2 inch pitch roller chains
  • Premium quality from trusted manufacturer Medway
  • Robust construction suitable for heavy-duty continuous operation

Ideal Applications

This large-capacity sprocket is well-suited for use in:

  • High-speed conveyor systems
  • Agricultural machinery and equipment
  • Manufacturing and processing equipment
  • Heavy-duty industrial drive systems
  • Applications requiring high gear ratios and smooth power delivery

Part of our comprehensive range of 08B2 pilot bore sprockets stocked from our UK warehouse. For assistance in selecting the correct sprocket for your specific application or technical support, please contact our expert team.


  • 08B2 Roller Chain To Suit