For Spherical roller bearings, it varies clearance and different cages. Even if we provide the bearing is good, if you choose the wrong type, the bearings cant be lasting long time: cement equipment should use C3 and C4 clearance instead of C0 and C3, fan should use CA not for MA, crusher should use MBC4 but not CAC3, steel plant should use high temperature bearing CC not CA, vibrating screen should use MA, MB. so if you are not sure which style, contact here for correct selections.