Roller bearing size mill installation space restrictions (metallurgical bearing depends on the roll neck bearing inner diameter, outer diameter and barrel diameter), bearing high section of smaller, belonging to the thin section bearings, but they must also withstand greater radial load, so use multiple-row roller bearings.

Mainly through four-row cylindrical roller bearings and four-row tapered roller bearings, double row cylindrical roller bearings, double row tapered roller bearing. Tapered roller bearings are mostly hollow rollers and pin-type cages, in order to improve lubrication of bearings, bearing surface and face were open cars bearing oil Groove and oil hole, when clearance is and roll neck bearing inner ring bore open spiral oil Groove on the surface.