Number of Teeth (Chordal Action)Nom. Pitch DiameterNom. Outer Diameter Nom. Hub Width Available Bore Sizes
inmminmminmmRound inSquare inRound mmSquare mm
12 (3.41%)2.3582.3580.75191.01.02525
16 (1.92%)3.1793.1791.0251, 1.251.525 to 3040
18 (1.52%)3.5893.5890.7519 1.0, 1.5 25, 40
20 (1.23%)3.8973.8971.025 1.5 40
24 (0.86%)4.61174.71191.0251 to 1.251.5 m 2.525 to 3040, 60
26 (0.73%)5.11305.11301.0251 to 1.251.525 to 3040
32 (0.48%)6.11556.21571.0251 to 1.251.5, 2.525 to 3040, 60
  • Available in natural acetal
  • Temperature range: -50°F to 200°F (-46°C to 93°C).