Four Row Tapered Roller Bearings

Four Row Tapered Roller Bearings

WSA can provide a wide of sizes and designs of four row tapered roller bearings for back-up roll, intermediate and work roll of the rolling mill.  Size range from 120mm to 1580mm (Bore diameter) Mostly used on Steel Production Equipment, Slap/Plate mill, Hot rolling mill, Hot strip mill, Cold rolling mill.
Four row tapered roller bearings are widely used in medium and low speed rolling mills. This kind of bearing has compact structure and can bear large radial and axial shock load in a limited space. Generally speaking, no additional thrust bearing is required in the bearing configuration. This means that the shaft neck diameter of the roll can be relatively short and housing on both sides of the roll can be the same. In order to be able to change the roll quickly, this kind of bearing must have clearance fit on the roll journal. The disadvantage of clearance fit is that the inner ring slides on its base under load, which usually causes the wear of the base with lower hardness than the bearing ring. In order to reduce the influence of clearance fit, that is to reduce wear, the bearing has a spiral groove in the inner ring bore or an oil groove on the side of the inner ring. These grooves deliver lubricant to the contact surfaces of the inner race and the base.

TQO type:

This kind of bearing adopts two double raceway inner rings, one double raceway outer ring and two single raceway outer rings. There are spacers between the inner ring and the outer ring for adjusting the clearance. Their performance is basically the same as that of double row bearings, which can bear large radial load, but the limit speed is low. It is mainly used in heavy machinery, such as rolling mill etc. with stamped steel cage. In general, outsize  bearings with an outer diameter bigger than 650mm or in special design, adopts welded pin cage . 

TQI type: 

 It consists of two double raceway outer rings, one double raceway inner ring, two single raceway inner rings and one outer ring spacer. Inner ring with roller and cage assembly. It is mainly used in heavy machinery, such as rolling mill etc. with stamped steel cage. In general, outsized bearings with an outer diameter greater than 650mm or in special design, welded pin cage are used. 

Sealed four row tapered roller bearing

Add seals on the basis of TQO structure to effectively prevent solid contamination, water or coolant from entering the bearing, also prevent the loss of lubricating grease and reduce the pollution of lubricating grease to the coolant. The bearing can be equipped with O-ring on the outer diameter, rubber seal with steel frame on both sides, and rubber seal between two inner rings. 

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To ensurethe production of top-notch bearings, WSA Bearing Company adheres strictly to S0 9001 qualitystandards at every stage of manufacturing. We go the extra mile to guarantee product excellenceby implementing rigorous control measures for all incoming raw materials, with each materialhaving its composition archived and documented. Only qualified products proceed to the nextproduction process, which includes thorough inspections using cutting-edge equipment suchas metallographic testing devices, Oxford roughness profile analvzers, fluorescent flaw detectorsuniversal microscopes,and coordinate measuring machines(CMM).

WSA bearing line includes cylindrical roller bearings (single row, double row, and four-row), deep groove ball bearings, tapered roller bearings, spherical roller and ball bearings, angular contact ball bearings (single row and double row), thrust roller and ball bearings, all kinds of split bearings and non-standard bearings, widely used in industries such as aerospace, military, railroads, commercial vehicles, industrial manufacturing, ships, machine tools, metallurgical plants, motors, and agriculture. We are dedicated to providing our customers with the highest quality products and services. Our team of experts is constantly innovating and developing to ensure that we remain at the forefront of the industry. Contact us today to learn more about our exceptional products and how we can assist you with your bearing needs.