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