NSK Bearings must be installed in a dry and clean environment. Before installation, carefully check the machining quality of the mating surface of the shaft and housing, the end face of the shoulder, the groove and the connecting surface. All Environment Of Nsk Bearing mating connection surfaces must be carefully cleaned and deburred, and the unprocessed surface of the casting must be cleaned of molding sand.
NSK Bearings shall be cleaned with gasoline or kerosene before Environment Of Nsk Bearing installation, and used after drying, and good lubrication shall be ensured. NSK Bearings are generally lubricated with grease or oil. When grease lubrication is used, grease with excellent properties such as no impurities, oxidation resistance, rust prevention and extreme pressure shall be selected.
The filling amount of grease shall be 30% – 60% of the volume of NSK bearing and NSK bearing housing, and shall not be too much. Double row tapered roller NSK bearing with Environment Of Nsk Bearing sealing structure and water pump shaft connected NSK bearing have been filled with grease, which can be used directly by users and can not be cleaned.
During the installation of NSK bearing, equal pressure must be applied on the circumference of the ferrule end face Environment Of Nsk Bearing to press the ferrule in. It is not allowed to directly knock the NSK bearing end face with hammer and other tools to avoid damaging the NSK bearing.
When the interference is small, the end face of NSK bearing ring can be pressed with the sleeve at room temperature, the sleeve can be knocked with a hammer, and the ring can be pressed in evenly through the sleeve. In case of mass installation, hydraulic press can be used. When pressing in, ensure that the end face of the outer ring and the end face of the housing shoulder, and the end face of the inner ring and the end face of the shaft shoulder are pressed tightly without clearance.
When the interference is large, the NSK bearing can be installed by oil bath heating or inductor heating. The heating temperature range is 80 ℃ – 100 ℃, and the height cannot exceed 120 ℃. At the same time, the NSK Environment Of Nsk Bearing bearing shall be tightened with nuts or other appropriate methods to prevent the gap between the ferrule and the shaft shoulder caused by the width contraction of the NSK bearing after cooling.
The clearance of single row tapered roller NSK bearing shall be adjusted after installation. The clearance value shall be determined according to different service conditions and the interference of the fit. If necessary, tests shall be carried out to determine. The clearance of double row tapered roller NSK bearing and pump shaft connected NSK bearing has been adjusted at the factory, so it is not necessary to adjust it during installation.
After the NSK bearing is installed, the rotation test shall be carried out. First, it shall be used for the rotating shaft or NSK bearing housing. If there is no abnormality, it shall be operated at no-load and low speed with power, and then gradually increase the rotation speed and load according to the operation situation, and detect the noise, vibration and temperature rise. If any abnormality is found, the operation shall be stopped and checked. It can be delivered for use only after the operation test is normal.
When NSK bearing is to be used after removal, appropriate removal tools shall be selected. When removing the interference fit ferrule, only the Environment Of Nsk Bearing tension can be added to the ferrule, and it is not allowed to transfer the disassembly force through the rolling element, otherwise the rolling element and raceway will be crushed.
Selecting the specification, size and accuracy according to the service parts, service conditions and Environment Of Nsk Bearing environmental conditions, and matching with appropriate NSK Bearings are the premise to ensure the service life and reliability of NSK Bearings.
1. Application position: tapered roller NSK bearing is suitable for bearing the combined radial and axial load dominated by radial load. It is usually used in pairs with two sets of NSK Bearings. It is mainly used in the Environment Of Nsk Bearing transmission parts of automobile, such as front and rear hubs, driving bevel gears, differential, reducer and so on.
2. Allowable speed: under the condition of correct installation and good lubrication, the allowable speed is 0.3-0.5 times of the limit speed of NSK bearing. Under normal conditions, it is appropriate to use 0.2 times of the limit speed.
3. Allowable inclination angle: generally, tapered roller NSK Bearings do not allow the shaft to tilt relative to the housing hole. If there is any inclination, it shall not exceed 2 ‘.
4. Allowable temperature: generally, NSK Bearings are allowed to work at the ambient temperature of – 30 ℃ – 150 ℃ under the condition of bearing normal load, high temperature resistance of lubricant and sufficient lubrication.