Number of Teeth (Chordal Action)Nom. Pitch DiameterNom. Outer Diameter Nom. Hub Width Available Bore Sizes
inmminmminmmRound inSquare inRound mmSquare mm
20 (1.23%)6.51656.51651.48382-7/16, 3-7/16 90
25 (0.8%)8.12068.12061.48382-7/16, 3-7/16 90
40 (0.31%)12.932813.03301.48382-11/16 60