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Product Specification
Boss Dia
90mm
Number of Teeth
21
Outside Dia
136mm
Overall Length
40mm
Pilot Bore Size
20mm
Pitch
3/4inch
Reference
6SR21
Brand
Medway
Quick Order Code
BB-20294
Product Description

12B1 British Standard Pilot Bore Sprocket

The 6SR21 is a precision-engineered pilot bore sprocket designed for use with 12B1 simplex roller chains. This sprocket features a pilot bore that allows for custom machining to your exact shaft requirements, making it an ideal solution for a wide range of industrial power transmission applications.

Key Specifications:

  • Pitch: 3/4 inch
  • Number of Teeth: 21
  • Boss Diameter: 90mm
  • Outside Diameter: 136mm
  • Overall Length: 40mm
  • Pilot Bore Size: 20mm
  • Manufacturer: Medway
  • Reference: 6SR21

Applications:

This versatile sprocket is suitable for use in:

  • Conveyor systems
  • Agricultural equipment
  • Packaging machinery
  • General industrial power transmission systems

With its 20mm pilot bore and robust construction, the 6SR21 offers excellent flexibility for custom shaft adaptations while maintaining reliable performance in demanding industrial environments. Available for quick dispatch from our UK warehouse, this British Standard sprocket is part of our comprehensive range of 12B1 3/4 inch pitch simplex chain sprockets.


  • 12B1 Roller Chain To Suit