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Ten elements to judge the quality of imported bearings
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1. Separable bearing (accuracy)
This is an imported bearing that can be separated by a ferrule; when both ferrules are tightly coupled, their strengths are outstanding.
2. Non-neutral compensation is not neutral when it is processed in the cooperation of the journal or the bearing housing; especially the processing of the cooperative appearance is not completed in one installation. Flange bearing or vertical bearing seat. Because the working load causes the shaft to bend and deform; then it causes the inner and outer rings of the bearing to be skewed; it will also be misaligned.
3. Conical bores Most of the self-aligning ball bearings with tapered bores, drum roller bearings and spherical roller bearings can be passed through an adapter sleeve to the cylindrical journal. These bearings are uniquely easy to install and disassemble. .
4. The length of the bearing itself compensates for the support of a shaft and the bearing is usually selected from the combination of fixed bearing and moving bearing. The floating bearing compensates for the length error and thermal expansion of the shaft.
NU-type and N-type cylindrical roller bearings are aspirational swimming bearings; these bearings can compensate for the length itself. The inner and outer rings of the bearing can be used tightly.
5. In addition to being heated and dissipated, internal conflicts also play a large role in determining the operating temperature of the bearing. Low-conflict bearings include: deep groove ball bearings that accept radial loads, single row angular contact ball bearings, and cylindrical rollers with cages. Sub-bearings. Touch-sealed bearings, full complement cylindrical roller bearings and thrust roller bearings can have a large conflicting force.
6. Accuracy In most cases, rolling bearings with normal dimensions and rotational accuracy are sufficient. When demand is higher, bearings require higher levels of accuracy.
7. The speed accuracy of the bearing, the accuracy of the rotation and the accuracy of the cooperation part; the smooth cooling method selected; the cage of the special method can improve the speed of the bearing.
8. The stiffness of a rigid bearing is usually the force required to assign a certain elastic deformation of the bearing. The bearings on the machine spindle and the pinion shaft are required to have high rigidity. Because the rolling elements and the raceway have different touch conditions; the roller bearing The stiffness is higher than the stiffness of the ball bearing.
9. Bearing radial load The bearing that receives the radial load is the radial bearing. The nominal touch angle of this type of bearing is a0<=45 0. The rain-like roller bearing is larger than the radial bearing that can be accepted by the ball bearing.
N-type and NU cylindrical roller bearings can only accept radial loads; other types of radial bearings can accept both radial loads and axial loads.
10. The axial load of the bearing The bearing that receives the axial load is usually the thrust bearing; its nominal touch 旮旯a0>450. The thrust bearing and the thrust angle touch ball bearing can accept the axial force in one or two directions together according to the different layout. 1. When the bearing force is uniquely high, it is preferred to use thrust cylindrical roller bearings and thrust spherical roller bearings.
Thrust spherical roller bearings and one-way thrust angle contact ball bearings can accept axial and radial loads together; other thrust bearings can only accept axial loads.
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