Number of Teeth (Chordal Action)Nom. Pitch DiameterNom. Outer DiameterNom. Hub WidthAvailable Bore Sizes
inmminmminmmRound in1Square inRound mm1Square mm
24 (0.86%)4.61174.81211.5381.25
32 (0.48%)6.11556.51641.538 30, 40
  1. U.S. key sizes on round bore sprockets are based on ANSI standard B17.1-1967 (R1989) and metric key sizes are based on DIN standard 6885.