SKF Expands Range Of Spherical Roller Bearings

SKF has expanded its range of sealed spherical roller bearings, increasing the number of applications for which the bearings can be used. Currently, more than 100 sizes are available. Bore sizes range from 25mm to 340mm and bearing outside diameters range from 52mm to 460mm. SKF Explorer sealed spherical roller bearings have the same load carrying capacity and, in most cases, the same ISO boundary dimensions as corresponding open bearings, enabling applications to be upgraded simply and cost effectively, according to the company.

With integral seals, these spherical roller bearings are protected against both particle and moisture contamination, enabling them to be relubrication free in most applications. As the bearings do not require external seals in all but the most aggressive environments, installation is simplified, further reducing downtime and maintenance costs. Standard SKF Explorer sealed spherical roller bearings feature acrylonitrile-butadiene (NBR) double-lip seals and high-quality SKF grease. The seals virtually eliminate the risk of lubricant leakage associated with conventional open bearings, minimising their environmental impact.

A high-temperature variant with hydrogenated NBR rubber seals (HNBR) and high-temperature SKF grease is also available. As is the case with all SKF Explorer spherical roller bearings, the sealed variant has a number of features that make the bearings suitable for use in demanding applications such as the material-handling, off-highway, metal and mining industries.

Self-aligning properties enable the bearings to accommodate misalignment of up to 0.5 between the shaft and the housing, without increasing friction or reducing bearing service life. SKF Explorer bearings provide a higher dynamic load carrying capacity than previous designs, enabling design engineers to 'downsize' their application. The company claims that the high-capacity sealed variants generally provide a long service life and good operational reliability thanks to the built-in cleanliness.

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