Stamping Simple linear bearings KH1228PP outer loop, an inner diameter of 12mm, an outer diameter of 19mm, length of 28mm, is formed by a stamped and hardened with an outer ring and a plurality of balls of glass fiber reinforced phenolic resin constituted a guide cage complete assembly systems unit, the bearing wear resistance, resistance to stress, and can be directly pressed holing hole, operation principle and sliding bearings, slotted the ball in order to be able to return to the load area on the outer ring. This whole series of linear bearing linear motion, rotational motion can not be used as a support member, the trip unrestricted, need less space, and no maintenance and low cost design features, which are widely used in the general machinery and equipment. It is mainly used in the economic mold, garden machinery, forklifts, hydraulic crawler open-air drills, loaders, storage equipment, electronic mold, household stir noodle machine, office equipment, equipment, flat drilling and milling machines, electric vehicle motors, ice cream display cabinets and other machinery industry.