The raceways of the inner and outer rings of NSK Bearings are arc-shaped raceways, and the raceway radius is slightly larger than the ball radius. It is mainly used to bear load and certain axial load. When the radial clearance of the bearing increases, the bearing with rolling bearing can bear large axial load and is suitable for high-speed rotation. It can still work normally, but its service life is affected. When the speed is high and the thrust ball bearing is not suitable, the bearing can bear the pure axial load.
NSK Bearings generally use two half riveted steel plate stamping cages, called wave cages, but solid cages are used for large size or high speed. Like stamping cages, such cages are blocked by balls and inner or outer rings of cages of rolling bearings. Compared with other types of bearings with the same size, the bearing has small friction coefficient, low vibration and noise, high limit and high precision. However, it is not resistant to impact and is not suitable to bear heavy load.
When lubricating bearings, the more grease the better, which is a common misconception. Excessive grease in rolling bearing and bearing chamber will cause excessive mixing of grease, resulting in extremely high temperature. The amount of lubricant filled in the rolling bearing should be 1 / 2 ~ 1 / 3 of the Nsk Rolling Bearings internal space of NSK bearing, and should be reduced to 1 / 3 at high speed.
You must select the appropriate clearance according to the conditions. In national standard 4604-93, the radial clearance of Nsk Rolling Bearings rolling bearing is divided into five groups – group 2, group 0, group 3, group 4 and group 5. The clearance value increases from small to large, of which group 0 is the standard clearance. Nsk Rolling Bearings The basic radial clearance group is suitable for general operating conditions, conventional temperature and common interference fit;
Large radial clearance should be selected for rolling bearings working under special conditions such as high temperature, high speed, low noise and low friction; Small radial clearance should be selected for precision spindle and bearing for machine tool spindle; Nsk Rolling Bearings For NSK Bearings, a small amount of working clearance can be maintained. In addition, there is no clearance for separate bearings;
the working clearance of the bearing after installation is smaller than the original clearance Nsk Rolling Bearings before installation, because the bearing has to bear certain load rotation and the elastic deformation caused by bearing fit and load. After the installation of NSK bearing, in order to check whether the installation is correct, operation inspection shall be carried out. Small machines can be rotated by hand to confirm whether they rotate smoothly.
The inspection items include poor operation caused by foreign matters, scars and indentation, unstable torque caused by poor installation and poor processing of mounting base, excessive torque caused Nsk Rolling Bearings by too small clearance, installation error and sealing friction, etc. If there is no abnormality, power operation can be started.
Power operation, starting from no-load low speed, slowly increase to the rated operation under the specified conditions. During the test run, the inspection items are whether there is abnormal sound, temperature change of rolling bearing, lubricant leakage or discoloration, etc. Nsk Rolling Bearings If any abnormality is found, stop the operation immediately, check the machinery, and remove NSK bearing for inspection if necessary.
Centripetal thrust ball bearing is a precision part, so it is required to be quite cautious in use, that is, it uses high-performance bearing. If it is not used properly, it can not achieve the expected performance effect, and it is easy to damage the bearing. Therefore, pay attention to the following matters when using bearings: