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20-XH-400F Imperial Pilot Bore Timing Pulley, 20 Teeth, 7/8" Pitch, For A 4" Wide Belt

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20-XH-400F Pilot Bore Timing Pulley, 20 Teeth, 7/8" Pitch, For A 4" Wide Belt.
Imperial timing pulleys have equally spaced grooves machined in to the outside diameter, to give correct meshing with the belts teeth, The pulley grooves are of special design to give this correct meshing of the belt teeth with minimal friction.
All pulleys manufactured have correct minimum meshing tolerances built in and the pitch diameter is always larger then the outside diameter.
Steel and cast iron pulleys are treated with black phosphate for protection.

  • Pulley Cross DiagramPitch (R) = 141.49mm

  • Outside diameter (S) = 138.70mm

  • Diameter including flanges (Øe) = 150.0mm

  • Pulley Width (W) = 119.0mm

  • Hub Diameter (H) = 114.0mm

  • Hub Width (Y) = 135.0mm

  • Recess (Z) = 16.0mm

  • Suits a 4" Wide belt.


  • Need a timing belt to suit? Click here for a 4" Wide H Section Belt.

    All dimensions are subject to change, if any dimension is critical please contact us.

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