Number of Teeth (Chordal Action)Nom. Pitch DiameterNom. Outer Diameter Nom. Hub Width Available Bore Sizes
inmminmminmmRound inSquare inRound mmSquare mm
6 (13.40%)5.01274.61171.538 1.5 40
8 (7.61%)6.51656.21571.538 1.5 40
10 (4.89%)8.12067.81981.538 1.5 40
13 (2.91%)10.526710.32621.538 1.5, 2.5 40, 60