Bearing knowledge / Four Row Cylindrical roller bearings
Date: 2013-08-06
Four Row Cylindrical roller bearings
Four Row Cylindrical roller bearings
Four Row Cylindrical roller bearings are also popular roll neck bearings providing several benefits.First,the inner ring is separable from the outer ring and rollers which allows the inner ring to remain with the roll during grinding processes.This assures precise concentricity and negligible run-out providing for high rolling accuracy, Secondly,this design allows for greater radial load carrying and higher operating speeds. Four row cylindricals require a thrust bearing which is usually a two taper, angular contact ball bearings, or a deep groove ball bearing depending on the thrust load present.
Two Row Tapered roller bearings are very common as the back-up thrust bearing in a rolling mill or as the roll neck in lighter duty rolling mills.Two row tapered are designed in a variety of styles for different applications.Converging bearings(TDI,TDIE,TDIS)consist of one double cone and two single cups possibly with a cup spacer. Diverging bearings(TDO,TDOD,TDOC)consist of two single cones, a cone spacer, and one double cup.
Angular contact ball bearings are used as thrust bearings for roll necks using for row cylindricals and having lighter load requirements. These bearings can only accept axial loads in one direction so they are used in sets of two with the contact angles diverging.
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