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Horological Wheel and Pinion Cutters

P.P. Thornton

We are an official supplier of P.P Thornton Horological Cutters, offering their complete range of Cycloidal Wheel and Pinion Cutters for clocks and watches, at no extra cost to you. We also offer their Fine Tooth Recoil Escape Wheel Cutters, Dead Beat Escape Wheel Cutters, Radiused Tooth Ratchet Cutters and Form Relieved Straight Tooth Ratchet Cutters.

  • M42 8% cobalt HSS for wear resistance
  • Wheel Modules: 0.09 - 1.5
  • Pinions: 6, 7, 8, 10, 12, 16 leaves
  • Escapes: Recoil or Dead Beat
  • Ratchets: Straight or Radiused
  • 7mm Bore

We do offer every single Horological Cutter size so if the cutter you are looking for is not shown below then please contact us to arrange delivery.

Please note, some cutters can take between 2-3 days to be delivered to the UK

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Recommended Cutting Speeds

For cutting carbon steel pinions with high speed steel cutters:

  • Cutter Diameter 14mm 430-500 rpm
  • Cutter Diameter 20mm 300-350 rpm
  • Cutter Diameter 24mm 250-290 rpm
  • Cutter Diameter 26mm 230-270 rpm

for cutting brass a speed of up to 3000 - 4000 rpm can be used but a much lower speed will preserve the life of the cutter.

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