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Product Specification
Boss Dia
58mm
Number of Teeth
18
Outside Dia
77.8mm
Overall Length
50mm
Pilot Bore Size
16mm
Pitch
1/2inch
Reference
4TR18
Brand
Medway
Quick Order Code
BB-20783
Product Description

08B3-18 Triplex Chain Sprocket

This compact 18-tooth pilot bore sprocket is engineered to the British standard 08B3 specification and is ideal for applications requiring precise power transmission in confined spaces. With its smaller tooth count, this sprocket is perfect for high-speed drive configurations and applications where space constraints are a priority.

  • 08B3 British standard roller chain sprocket
  • 1/2 inch pitch x 18 teeth
  • 16mm pilot bore size – suitable for standard shaft applications
  • Outside diameter: 77.8mm
  • Boss diameter: 58mm
  • Overall length: 50mm
  • Triplex (three-strand) configuration for heavy-duty power transmission
  • Manufactured by trusted brand Medway

Typical Applications:

  • High-speed conveyor systems
  • Industrial machinery requiring compact drive solutions
  • Power transmission systems with space limitations
  • Heavy-duty industrial equipment where reliability is essential

This sprocket is compatible with all standard 08B3 triplex roller chains and provides reliable performance in demanding industrial environments. Our technical team is available to assist with selection and application advice – please contact us for further information.


  • 08B3 Roller Chain To Suit