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Dimensions, tolerances, clearances
The dimensions of standard angle tapered roller bearings conform to GB/T273.1 "General Plan for Rolling Bearing Tapered Roller Bearings", GB/T297 "Rolling Bearings Tapered Roller Bearings", GB/T299 "Rolling Bearings Double Row Tapered Roller Bearings" Bearing Dimensions", GB/T300 "Rolling Bearing Four Row Tapered Roller Bearing Dimensions" and other regulations.
The tolerance of standard tapered rollers complies with the provisions of GB/T307.1 "Tolerances of Rolling Bearings and Radial Bearings".
The clearance of tapered roller bearings and the clearance of single row tapered roller bearings can only be achieved by adjusting the position of the outer ring and the inner assembly in the axial direction during installation, and another position used to provide reverse axial positioning of the bearing get. When adjusting the clearance, the bearing must be rotated several times to ensure that the roller and the inner ring guide rib are in a good contact position. The clearance value can be selected by the customer according to the requirements of different working conditions of the bearing.
However, when selecting the clearance, it should be noted that if the clearance is too large, the bearing capacity of the bearing will be weakened, and if the clearance is too small, it will cause excessive friction and increase the operating temperature. high. It can be determined that the adjustment of the clearance value is better based on the low operating temperature of the bearing, small vibration, and high rotation accuracy. The clearance of double and four-row tapered roller bearings has been adjusted by the manufacturer before leaving the factory, and customers can directly install and use them.
The dimensional tolerance grade of standard tapered roller bearings is generally manufactured according to P0 grade (ordinary grade). If customers have other special requirements (including non-standard) on size, tolerance and clearance, TG can provide corresponding products.
Single Row Tapered Roller Bearings
Single row tapered roller bearings can bear axial load in one direction. And it can limit the axial displacement of the shaft in one direction relative to the bearing seat. Even under the action of pure radial load, an additional axial component force will be generated inside the tapered roller bearing. At this time, an equal amount of reverse force is required to balance it. Usually, two single-row tapered roller bearings of the same structure are installed face-to-face or back-to-back in two supports.
Single row tapered roller bearings can also be used in pairs, such as face-to-face or back-to-back.
Tapered roller bearings with stop ribs
Tapered roller bearings with stop ribs have stop ribs on the outer ring and the inner assembly is the same as that of a single row tapered roller bearing. Tapered roller bearings with stop ribs can be positioned axially on the bearing seat, and simplify the configuration design of the bearing and the structure of the bearing seat.
Double Row Tapered Roller Bearings
Double-row tapered roller bearings can bear bidirectional axial loads while bearing radial loads. The clearance has been adjusted before the product leaves the factory, so it can be installed and used directly without adjusting the clearance. Double-row tapered roller bearings can limit the axial displacement of the bearing relative to the housing in two directions within the range of axial clearance of the bearing.
Four row tapered roller bearings
The performance of four-row tapered roller bearings is basically the same as that of double-row tapered roller bearings, but the ability to withstand radial loads is greater than that of double-row tapered roller bearings. The limit speed is low, and it is mainly used for heavy machinery, such as rolling mills.
30215 bearing (inner diameter: 75.000 outer diameter: 130.000 thickness: 27.250 tapered roller metric 0000 series)
Machine tool spindles, construction machinery, large agricultural machinery, hydroelectric generators, vertical motors, propeller shafts for ships, reducers for rolling screws in rolling mills
We uphold a consistent level of professionalism, quality, credibility and service for Japan Brand NACHI NSK IKO Koyo SKF Tapered Roller Bearing Taper Roller Bearing (30202 30203 30204 30205 30203 30207 30208 30209 30210 30302 30203 30317). In the future, we will continue to work hard to improve product performance and quality according to customer needs. We sincerely look forward to your guidance and support. We must continue to innovate and rely on our own intellectual property and well-known brands to enhance our international competitiveness.