In the assembly of CNC machine tool bearings, the pilot CNC should be preloaded, so that the original clearance will be eliminated after the installation of bearings, so that the contact Angle and accuracy of CNC machine tool bearings have a very important role. Therefore, when installing bearings, it is necessary to ensure that the contact Angle is qualified, but also to ensure that the actual width of angular contact ball bearing meets the regulations. Bearing failure is common in the process of operation, so there is no need to make a fuss. There is a fault, judgment and treatment is the key.

Below we analyze, CNC machine tool bearing common quality problems and reasons.

First, improper installation
1. When installing, use brute force, and hit the bearing directly with a hammer to cause the greatest damage to the bearing; Is the main cause of deformation. This is very common in some small machine tool factories, and Gold Star Machine tool avoids this by using professional bearing mounting tools when mounting bearings.

2. The installation is not in place, the installation is deviated or not installed to the bearing position, resulting in too small bearing clearance. The inner and outer rings are not in the same center of rotation, resulting in different centers.
Suggestion: Select appropriate or professional bearing installation tools, installation should be tested with special instruments.

Two, poor lubrication
According to investigation, poor lubrication is one of the main causes of premature bearing damage. The main reasons include: not filling lubricant or lubricating oil in time; Lubricant or lubricating oil is not filled in place; Improper selection of lubricant or lubricating oil; Incorrect lubrication and so on.
Recommendation: Select the correct lubricant or lubricating oil, use the correct lubrication filling method.

Iii. Pollution
Pollution can also lead to premature bearing damage, pollution refers to sand, metal chips and so on into the bearing. The main reasons include: premature opening of bearing packaging before use, resulting in pollution; Installation of the working environment is not clean, resulting in pollution; The working environment of bearings is not clean, and the working medium is polluted. All spindle assembly of Jinxing Machine tools is done in a constant temperature cleaning room, thus avoiding bearing contamination.
Suggestion: It is best not to unpack the bearing before use; Keep the installation environment clean during installation, and clean the bearings to be used; Reinforced bearing seal device.

Four, fatigue
Fatigue failure is a common way of bearing failure. Common causes of fatigue failure may be: bearing long-term overload operation; Not timely maintenance; Improper maintenance; Equipment aging, etc.

Five, the quality of bearings
The quality of the bearing itself is directly related to the service life. Our factory all uses imported bearings or domestic first-line brands, so as to avoid this problem.