13/16" finished bore hubs are bored-to-size and include a keyway & 2 setscrews. All X series hubs are manufactured from 1020CD carbon steel and finished with black oxide for corrosion resistance. Our 13/16" weld on hubs is compatible any of our X series weld on sprockets.
It's recommended to use Low Hydrogen Electrodes for welding weld on sprockets & hubs. Below is a diagram showing the location to weld on small vs large diameter sprockets.