SIB Series spherical bearing. Made with stainless steel race. With a 5/8" inner diameter, a 1" outer diameter and a width of 1". The SIB and SIB-T Series spherical bearings are QA1's top of the line commercial spherical bearing. Offering better wear characteristics than their traditional carbon steel counterparts, these spherical bearings are made from Stainless Steel and are corrosion resistant. They are also available with an optional self-lubricating PTFE liner (SIB-T Series). The ball is made from 52100 bearing steel that has been heat treated, hard chrome plated and precision ground. The optional PTFE liner is self-lubricating and the race is heat treated, oil coated stainless steel.