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First, the measurement of the size of the shaft and the bearing hole to determine the precision that they complement each other, with the request to take an interference fit: the inner ring and the shaft, the amount of interference ~~ +4 um (light-load, high-precision 0 under); outer ring of the bearing hole should take a gap with the amount of backlash 0 ~ +6 um (when the free end bearings bearing should increase the gap); surface of shaft and housing bore roundness error below 2um bearing end face parallelism spacer in 2um below, the shaft shoulder end face the external end of the beating in the 2um; the bearing hole stop shoulder axis beating 4um following; spindle inside the front cover side facing the axis fluctuations should also below 4um .
Then, before the fixed end bearing shaft mounting position: bearing with clean kerosene cleaning, and to be measured to the bottom. For grease lubrication, the first injection after bearing for degreasing cleaning organic solvent containing from 3% to 5% of the grease, and then the oil gun quantitative grease fill bearing (representing the bearing space is approximately 10% to 15% ); heating bearings to the 20 ~ 30 ℃, oil press the bearing onto the shaft; adapter sleeve pressure in the shaft and up against the bearing end face axially positioned to the right pressure; spring balance tape volume in the bearing outer pre-load circle, under the method of measuring the starting torque check whether there are significant changes (even if the bearings are correct with improper or cage deformation preload may change).
Next, we need to be loaded into the housing bore bearings - axis combination: heated seat hole temperature 20 to 30 ℃ consecutive playful pressure will be loaded into the housing bore bearings - shaft combination; adjust the front cover, the front cover fastening capacity of 0.02 ~ 0.05um, to end basis chock, the dial gauge table first conflict in the journal surface on its axis of rotation measurement beating the error in less than 10um; dial gauge positioning in axis, the first table, subject to the back seat of the inner surface of the bore, the axis of rotation to measure the bearing bore concentricity of the front and rear seats.
The use of loss bearing the main factors is the installation and adjustment, maintenance, maintenance and repair, such as compliance with the technical requirements. Installation conditions is one of the primary factors in the use of factors bearing often due to improper installation force state changes between the parts of the whole set of bearings, bearing operation in the normal state and loss. According to the bearing installation, use, maintenance, maintenance of technical requirements, the operation bearing to withstand the load, speed, operating temperature, vibration, noise and lubrication condition monitoring and inspection, abnormal immediately find out the reasons, to adjust its return to normal.
| Product Model | Inside Diameter | Outside Diameter | Thickness |
| 7007ATYNDBLP4 NSK | 35 | 62 | 14 |
| 7007A5TYNDBLP4 NSK | 35 | 62 | 14 |