Four-row tapered roller bearings consist of two double row inner rings and one double row outer ring and two outer ring comprising a spacer between the two inner rings, three has two intermediate ring between the outer rings to adjust the clearance.
Four-row tapered roller bearings of the small and medium sizes are manufactured from bearing, a large four-row tapered roller bearing made of carburizing steel, special large size hollow rollers and pin-type cages in order to increase service life of the bearing.
Cage materials
Four-row tapered roller bearing with pressed window-type steel cage, special large-pillar cage must be welded.
Allows the angle alignment errors
Four-row tapered roller bearings are generally not permissible axial housings tilt, tilt maximum not more than 2 ". As a result, production requirements, as the bearing of four-row tapered roller bearings are subjected to bending force and tilt of the axis over 2 "requirements, bearing roller and the Raceway will cause additional stress, which increases the bearing load shortens bearing life.
Tolerances and internal clearance
Four-row tapered roller bearings are generally for the tolerance class P0, but may also be based on user needs to produce higher bearing tolerance classes.
Four-row tapered roller bearing clearance, at the time of Assembly with installation and adjustment procedures in bearing production agreement (without Protocol according to the standard clearance) adjust the bearing clearance, users after a certain period, should be re-adjust clearance, tube adjust the clearance method, see WPL technical services.
When the withstand greater radial load can also withstand axial load in both directions, but allows the rotational speed of the bearing is not high, mainly for rolling mill roller bearings. In recent years, started production of the bearings with seals on both sides of the four-row tapered roller bearings, and began to be widely used.