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. The bearing has high standardization, low price, small changes to the 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 sequence and rules for selecting bearings. Priority should be given to the conditions, performance and most relevant matters required for bearings, which is particularly practical.
Rolling bearing is a precision component, and its use must 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. Precautions for the use of bearings are as follows.
a. Keep the bearings and their surroundings clean.
Even small dust that cannot be seen by the eyes will have a bad impact on the bearing. Therefore, keep the surrounding clean so that dust will not invade the bearing.
b. Use with care.
Strong impact on the bearing during use will produce scars and indentation, which will become the cause of the accident. In serious cases, it will crack and fracture, so we must pay attention to it.
c. Use appropriate operating tools.
Avoid replacing with existing tools, and appropriate tools must be used.
d. Pay attention to the corrosion of the bearing.
When operating the bearing, the sweat on the hand will become the cause of rust. Pay attention to operate with clean hands, and it is best to wear gloves as much as possible.
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 in order to prevent accidents, ensure the reliability of operation and improve productivity and economy.
Post time: Sep-27-2021