SKF’s bearing factory in Gothenburg, Sweden, has produced the company’s largest sealed spherical roller bearing to date. The 241/900 spherical roller bearing is 50 percent larger and three times heavier than the previous largest SKF sealed spherical roller bearing.
Destined for a Polysius Polycom 8 roller press at a large copper mine in Peru, the 3.3-ton heavy spherical roller bearing is dimensionally equivalent to the standard SKF nonsealed version, with a bore diameter of 2.95 feet, an outside diameter of 4.66 feet and a width of 1.69 feet. The bearing seal consists of a rubber over-molded steel plate with the same profile and offering the same characteristics as those currently used with existing SKF sealed spherical roller bearings.
The bearings will be fitted to a horizontal shaft and will operate in extremely dusty conditions. The roller press is a heavy-load application subject to frequent shock loading; the predominantly radial loads, when coupled with the high level of contamination at the site, pose a significant risk of early bearing damage and failure. SKF’s custom-made seal aims to at least double the bearing service life by significantly reducing the risk of contamination in this application.