EA-series bearings from Wyko
"Wyko have expanded their range of bearings for use in heavy-duty processing and handling applications with the introduction of NSK’s new EA-series high-performance spherical roller bearings. The EA series’ new patent pending internal design is said to offer the advantages of longer life through reduced heat generation, low wear, high strength and improved heat resistance for operations at temperatures as high as 200°C, thereby resulting in improved cost performance, stable operation and maximum efficiency."
"The bearings offer load ratings exceeding those of previous designs by 10–30%, making them suitable for extending the life of transmission system equipment such as heavy-duty gearboxes. The increased load rating is achieved by means of a cage design that eliminates the need for a separate guide ring. This allows a greater number of larger diameter rollers to be incorporated compared with previous spherical roller bearings using pressed-steel cages. The higher load rating leads to a significantly extended operational fatigue life."
"The EA design incorporates the function of the guide ring within the cage. The advantages of this are that heat generation is substantially reduced and the limiting speed for the bearing is much higher. The elimination of the guide ring also ensures that the cage is well balanced and offers increased strength. Moreover, cage wear is substantially reduced by utilizing a high-precision, roller-guided cage, which minimizes skewing of the rollers with closely controlled clearances."
The EA-series bearings feature optimized raceway and roller contact surface geometry together with the provision of heat-stabilized inner and outer rings and pressed-steel cages to allow high-temperature operation.