Number of Teeth (Chordal Action)Nom. Pitch DiameterNom. Outer DiameterNom. Hub WidthAvailable Bore Sizes
inmminmminmmRound inSquare in Round mmSquare mm
16 (1.92%)5.11305.21322.0511 to 21.525 to 5040
18 (1.52%)5.71455.81482.0511 to 21.5, 2.525 to 5040, 60
21 (1.12%)6.71706.81722.0511 to 21.5, 2.525 to 5040, 60
  • Available in grey glass-filled nylon
  • Round bores are available in 1/16 in or 5 mm increments in the listed size range.
  • The 2.5 in square bore is created by using a bore adapter in the 3.5 in square bore sprocket
  • Tight fit round bores are available in 1-1/4, 1-3/16, 1-1/2, and 1-7/16 in.
  • Temperature range: -51°F to 240°F (-46°C to 116°C)