SKF
| Scale quantity | Your discount | Unit price |
|---|---|---|
| 2 | 13,79 € | 261,97 € |
| 5 | 27,57 € | 248,19 € |
The SKF 30318 tapered roller bearing, with main dimensions of 90 x 190 x 46.5 mm, is designed to accommodate high combined radial and axial loads in industrial applications.
The 30318 tapered roller bearing is a single-row roller bearing in a standard design based on metric dimensions. As a complete tapered roller bearing from SKF, the unit consists of an inner ring with a roller cage and a separate outer ring. Thanks to the tapered arrangement of the rolling elements, this bearing is specifically designed to accommodate simultaneously acting radial and axial forces in one direction. Design engineers and maintenance personnel rely on this series when shaft supports require high rigidity and load-carrying capacity with defined installation dimensions.
This single-row bearing is primarily used in industrial bearing arrangements subject to combined loads. Wherever combined loads occur and shafts need to be guided, this design fulfils its purpose. Typically, users fit the 30318 tapered roller bearing in pairs, in conjunction with a second tapered roller bearing positioned in a mirror image. This arrangement accommodates axial forces from both directions and allows the operating clearance to be precisely adjusted via axial preload.
The bearing features a dimensionally stable sheet steel cage and is designed for operating temperatures ranging from –30 to +120 degrees. It is manufactured to standard tolerances in accordance with tolerance class P0 or ABEC 1. As the inner and outer rings can be fitted separately, the separable design facilitates installation in the housing and on the shaft. When selecting the bearing, you should ensure adequate lubrication and careful adjustment of the axial clearance during assembly.
The bearing has an internal diameter of 90 mm, an external diameter of 190 mm and a total width of 46.5 mm. These standardised metric dimensions enable a precise fit when installed in housing bores and on drive shafts designed for the standardised 303 series.
Thanks to the angled rollers, the design can simultaneously absorb high radial forces and axial forces in one direction. To accommodate axial forces acting in both directions, designers usually fit two tapered roller bearings in a mirror-image configuration in an O or X arrangement, thereby creating a rigid, play-free shaft mounting.
The operating temperature range is specified as -30 to +120 degrees. The main limiting factors here are the choice of lubricant and the dimensional accuracy of the components. Within this range, the fitted sheet steel cage retains its mechanical strength and guiding properties in standard industrial applications.
The designation P0 or ABEC 1 denotes the standard tolerance for rolling bearings. It defines the permissible dimensional and running errors for the inner ring, outer ring and width. This accuracy class covers the vast majority of industrial applications in mechanical engineering and gearbox manufacturing.
In this type of bearing, the inner ring, cage and roller ring form a pre-assembled unit, whilst the outer ring is flangeless and can be removed freely. This non-self-retaining design simplifies assembly, as the inner and outer rings can be pressed onto the shaft and housing separately.
Single-row tapered roller bearings do not have a fixed bearing clearance as standard. Users set the operating clearance or the required preload only during installation by axially positioning the outer ring relative to the inner ring. In practice, this is usually achieved using shims, shaft nuts or adjustable housing covers.
SKF Group
Sven Wingquists Gata 2, 415 50 Gothenburg, Sweden
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