R” Hubs – For Assembly With “AR” Plate Sprockets
Circular bore hubs have regular keyway and 2 setscrews. Square, Hex and Splined bore hubs possess set screws only.
Ready READY SPROCKET HUB – TYPE R Sprockets are a variety 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 finished bore hubs to accommodate shaft sizes through 2-3/4″ diameter, plus a variety of sq ., hex, spline, and tapered key bores.