Spherical Roller Bearings
Sven Wingquist (1876–1953) invented the spherical bearing in 1907. He founded a global company in Sweden, AB Svenska Kullagerfabriken, now commonly known as SKF, which is still the world’s leading producer of industrial bearings.
When you have a difficult, heavy job, spherical bearings may be your answer. Heavy load capacity and tolerating misalignment is what makes this design popular in industrial environments. You'll find this design used in heavy machinery where it difficult to obtain or maintain perfect housing bore and shaft alignment.
Spherical roller bearings, sometimes termed barrel roller bearings, are single or two row self-aligning roller bearings. They comprise solid outer rings with a concave raceway. They have solid inner rings and a cylindrical or tapered bore and barrel-shaped (aka: spherical) rollers with separator cages. The cages are typically made of steel for high loading or of bronze for smoother performance.
These bearings are particularly suitable where high radial shock type loads occur and misalignments must be compensated for. Their axial load carrying capacity is relatively small. The oscillating motion of a vibrating screen, used in mining and oil extraction/exploration, is a perfect example of where these bearings come into their own.
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