Oasis Machinery 28504 5/8" Diameter Ball Bearing Work Rollers (6 / Pack ). This roller ball bearing is an essential component to building your own rolling work table. This handy roller ball bearing is just what you need for constructing moveable surfaces in the home, garage or professional shop. Unlike rollers which operate only in a straight line, these 360º universal transfer bearings excel where shop materials are pushed and turned in all directions. With a load bearing capacity of 75 lbs. each, these bearings are supplied in a set of 6.