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How to choose SKF bearing type precision grade

The accuracy grade of SKF bearing is improved from 0 to 0, which is sufficient for general use, but requires 5 or more accuracy when used in Table 1.

Although the accuracy level of the above is based on the ISO standard, but its name is different in the national standard.

Lists the various types of SKF bearing the accuracy of the application level and the comparison between the various standards.

Dimensional accuracy (related to the installation of shafts and housings)

1, inside diameter, outside diameter, width and assembly width of the allowable deviation

The allowable deviation of 2, and the outer diameter roller group round round diameter

3, the allowable limit value chamfer dimension

4, the width of the allowable change

Rotation precision (related to the rotation of the body of the project)

1, the inner and outer rings allow radial and axial

2, the inner ring of the allowable lateral beat

3, the outer diameter of the slope of the allowable change of momentum

4, the thrust bearing roller thickness of the allowable change

Standard SKF Bearing type, size and different, in the design of mechanical device is best use of standard bearings (the design to the bearing is easy to purchase, here said the sentence digression, some SKF Bearing catalog model does have, but some non standard bearings in mainland China has no cash, sometimes futures will for a long time, so in the bearing selection to consider the time cost and a late replacement cost) SKF Bearing load applied on the bearing load and the nature, size, direction is changeable. Generally, the basic load rating is displayed on the size table. But the axial load and radial load, etc., is also an important factor to select the appropriate SKF bearing. When the ball and needle bearing size quite, SKF needle bearings typically have a higher load capacity and bear a larger vibration and shock loads.

Allowable speed is determined according to SKF bearing type, size, precision, holder type, load, lubrication, and cooling mode. SKF bearing table lists the standard precision bearings in oil lubrication and grease lubrication under the allowable speed. Usually, deep groove ball bearings, self-aligning ball bearings and cylindrical roller bearings are suitable for high speed operation.

SKF bearing size accuracy and rotation accuracy is based on the ISO and JIS standards. Requirements for high precision and high-speed operation of the machinery, it is recommended using precision of level 5 or above the SKF Bearing, deep groove ball bearing, a centripetal thrust ball bearings or cylindrical roller bearing is applicable to high running accuracy of mechanical. The elastic deformation is generated when the rolling element of the SKF bearing and the contact surface of the rolling path are pressed. Some machines need to minimize elastic deformation. The roller bearing is smaller than the elastic shape of the ball bearing.

In addition, in some cases, SKF bearings have to be pre pressed to increase the stiffness. This procedure is usually used for deep groove ball bearing, a centripetal thrust ball bearings and tapered roller bearing inner ring and the outer ring of bias, bent shaft, shaft or bearing box tolerance variations, combined with errors will lead to the eccentricity of the inner and outer rings. In order to prevent the eccentric angle is too large, the automatic ball bearing, self-aligning roller bearing adjustable bearing seat is better choice. Voice frequency and torque, rolling bearings are based on a high standard of precision manufacturing, so the noise and small torque. Deep groove ball bearings and cylindrical roller bearings used for low voice, low torque occasions with special requirements.


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