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How to determine the accuracy level of KOYO cylindrical roller bearing type

KOYO cylindrical roller bearings with the accuracy of grade from 0 in order to improve the general use of the 0 level is sufficient, but in Table 1 as shown in conditions or occasions, the need for 5 or higher accuracy. Precision above grade, while to the ISO standard as a benchmark for the development of, but the name in the national standards of different lists between various Koyo cylindrical roller bearing type in the application of the precision grade and national standards of comparison.

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 Koyo cylindrical roller 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 is a slight digression, some Koyo cylindrical roller bearing catalog model does have, but some non-standard bearings in mainland China does not have a spot, sometimes futures will for a long time, so in the bearing selection to consider the time cost and a late replacement cost) Koyo cylindrical roller 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 and so on, is also the choice of suitable KOYO cylindrical roller bearings important factors. When the ball and needle bearing size quite, Koyo needle cylindrical roller bearings typically have a higher load capacity and bear a larger vibration and shock loads.

Allowable speed is based on KOYO cylindrical roller bearing type, size, precision, cage type, load, lubrication, and cooling methods, and other factors determine. KOYO cylindrical roller 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.

KOYO cylindrical roller 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 the precision of level 5 or above Koyo cylindrical roller bearings, deep groove ball bearing, a centripetal thrust ball bearings or cylindrical roller bearing is applicable to high running accuracy of mechanical. Rigid, when the KOYO cylindrical roller bearing and rolling contact surface compression, will produce elastic deformation. 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 KOYO cylindrical roller bearings to be applied to increase the rigidity of the preload. 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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