Spherical Roller Bearings
NACHI double-row Spherical roller bearings are available in bore sizes from 25 mm to over 1000 mm. The raceways in the outer ring of this type bearing are designed with a spherical surface whose center coincides with the bearing center.
NACHI Spherical roller bearings are of an improved design having a modified line contact between the raceways and rollers. This construction enables very high radial and impact-Ioad capacity. This bearing type can carry a moderately-high level of bi-directional axial load and is self-aligning.
This type is used extensively for large machines where shaft deflection or mounting error may occur . Spherical roller bearings are used for paper mill equipment, rolling machines, rolling stock, shaker screens and general industrial machinery.
The mounting and dismounting of Spherical roller bearings is facilitated through the use of tapered- bore bearings in conjunction with tapered journals, or adapters or L-withdrawal sleeves.
Internal clearance can also be precisely set using a tapered- bore bearing. Pressed steel cages are used for small- bore bearings and machined, high- strength brass or mild-steel cages are used for bearings with larger bores.
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