What types of bearings are used in port lifting machinery?
What types of bearings are used in port lifting machinery?
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The precision of the rolling bearing and grade - bearing knowledge
by：Waxing
2020-06-21
The precision of the rolling bearing points (
The main)
Dimensional accuracy and rotation accuracy.
Precision grade has been standardized, divided into P0, P6, P5, P4, P2 grade five levels.
Since a level 0, in turn, improve accuracy, for general purpose level 0 is enough, but in used are shown in table 1 conditions or situations, needs to be level 5 or higher precision.
Although more accuracy grade is set by the ISO standards as a benchmark, but its name is different in the national standard.
Table 2 lists the various bearing type applicable level of accuracy as well as the comparison between international standards.
Dimensional accuracy (
Associated with the axis and shell installation project)
1, inner diameter, outer diameter, width and assembly width within the allowable deviation of 2, the roller group months-moons last contact outside diameter and the diameter of the allowable deviation 3, acceptable limit value of the chamfer size 4 rotating accuracy, width to allow changes (
Projects related to the rotator to beat)
1, inner ring and outer ring radial runout and axial runout 2, without the permission of the inner ring allows transverse beating 3 plane inclination, diameter changes in volume 4, without the permission of the thrust bearing raceway thickness changes in volume 5, without the permission of the tapered hole deviation and allow change quantity allowed
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