Japanese seiko NSK four row circular cone roller bearings successfully used in steel rolling speed for low to medium speed of rolling mill around the world in the configuration of the bearing. Because of its design, the bearing can in radial direction load besides bear appears in this application situation of the axial load, and generally do not need configuration in bearing the thrust bearing of another. This means that the rolling the roller neck but relatively short, and roll bearing can be used on both sides of the same design.

Due to the four row circular cone roller bearings, the design of the bearings must be installed in the roller bearing as complete on housing. In order to be able to quickly replace roll, the bearing in rolling the roller neck must cooperate with loose. With shortcomings is loose in the circle in the conditions of loading in its base peristalsis, usually cause hardness than the base of the low bearing circle of wear and tear. To a certain extent in order to reduce the influence of loose with, that is to reduce wear, NSK bearing, a spiral groove in the circle hole, and/or circle have oil, side. These oil lubricant to the inner circle and the contact surface base. In addition, filling grease groove can absorb the wear particles.

NSK manufacturing four row circular cone roller bearings range, including not only in the outer ring and/or inner circle with the middle circle between traditional design, and have the retrofit for middle circle and bearing circle as a body of the new design. The development of this without NSK middle circle of four row circular cone roller bearings of the specific advantages including

-as components less, simplified installation;

-four row roller load distribution of improved, so as to reduce wear and prolong service life;

-due to a decrease in inner ring width tolerance, simplified the roller neck in rolling axial location;

-size with the middle circle with traditional four row circular cone roller bearings are the same.

In all cases of application in order to make full use of the advantages, NSK production among the circle with the traditional design bearing is gradually to a new design transformation.

 
NSK four row circular cone roller bearings TQO and TQI design according to production. The main difference is the roller and maintains a module structure or configuration, and the inner ring and outer ring provisions of the number. But, almost all bearing with TQO bearing.



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