Dynaline 55490 Vari-Speed Pulley 3-1/4 x 1/2, C/W Set Screws

Solid type. For “A” & “B” belts. Opening the pulley increases the speed at which it rotates. Supplied with set screws. Outside Diameter: 3-1/4”, Bore: 1/2”, Keyway: No Material: Die Cast Aluminum. Type: Variable Speed. Outside Diameter: 3-1/4”.