RBI Bearing’s rubber cartridge bearing units are made from 52100 high carbon steel and have a conductive rubber interliner. RBI’s rubber cartridge bearing units run cooler at high speeds which extends the life of the lubricant. They come sealed with a steel slinger over a Buna N Nitrile single lip medium contact seal for exceptional protection. Our Rubber Cartridge Bearing Units use Grade 10 high precision balls and are available in Set Screw or Eccentric Locking Collar. RBI Bearing’s engineers are highly skilled and will perform bearing applications assessments to ensure you’re using the right bearing for your application.