R” Hubs – For Assembly With “AR” Plate Sprockets
Circular bore hubs have standard keyway and 2 setscrews. Sq ., Hex and Splined bore hubs have set screws only.
Ready Sprockets are an assortment of sprockets and hubs drilled and tapped for simple, convenient assembly with standard hex head cap screws. For No. 35 READY SPROCKET HUB – TYPE R through No. 100 Chain, with stock completed bore hubs to accommodate shaft sizes through 2-3/4″ diameter, 
plus a variety of square, hex, spline, and tapered crucial bores.