At present, the most widely used high-speed spindle bearing is hybrid ceramic ball bearing, that is, the rolling element uses hot pressing or hot isostatic pressing Si3N4 ceramic ball, and the bearing ring is still steel ring. This kind of bearing has the advantages of high standardization, low price, small modification to machine tool, easy maintenance, and is especially suitable for high-speed operation. Its D · n value has exceeded 2.7 × 106。 In order to increase the service life of the bearing, the wear resistance of the raceway can be increased, and the raceway can be coated or other surface treatment.
There is no certain order and rule in selecting bearings. The priority should be given to the conditions, performance and the most related matters required by bearings, which is particularly practical.
Rolling bearing is a precision part, so its use should be carried out with corresponding caution. No matter how high performance bearings are used, if they are not used properly, the expected high performance will not be obtained. The precautions for the use of bearings are as follows.
a. Keep bearings and their surroundings clean.
Even the small dust that can’t be seen by the eyes will bring bad effect to the bearing. Therefore, to keep the surrounding clean, so that the dust does not invade the bearing.
b. Use it carefully.
In the use of the bearing to give a strong impact, will produce scars and indentation, become the cause of the accident. In serious cases, it will crack and fracture, so we must pay attention to it.
c. Use proper operation tools.
Instead of using existing tools, appropriate tools must be used.
d. Pay attention to the corrosion of the bearing.
When operating the bearing, the sweat on the hand can be the cause of rust. To pay attention to use clean hands, it is best to wear gloves.
In order to maintain the original performance of the bearing in good condition for as long as possible, it is necessary to maintain and repair the bearing in order to prevent accidents, ensure the reliability of operation, and improve the productivity and economy.
Post time: Jul-08-2021