Timing Pulley 42H100-SK

H Timing Pulleys are manufactured to extremely close specifications and are stocked in minimum plain bore, Taper Bushed and QD bushed styles depending on size and pitch. See tables for stock pulley types. Bushings are priced separately and must be added to pulley price.
Timing pulleys have evenly spaced axial grooves cut in their periphery to make correct, positive engagement with the mating teeth of the belt. These pulleys are designed so that the teeth of the belt enter and leave the grooves with negligible
friction. All pulleys, stock and made-to-order, have minimum tooth-to-groove clearance (backlash). The pulley’s pitch diameter will always be greater than its outside diameter. Pulleys are available in a wide range of stock widths and diameters. 
Note: H Timing Pulleys 14 - 28 teeth min. plain bore stocked with 1 set screw. If keyway is used, reduced max. bore by twice keyway depth.
See Bushing Catagory for pulleys that require QD Bushings.