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So when we check the thin-walled cross-roller bearings, you should clean the bearing surface, and then remove the bearing parts around. We should pay attention to, is very fragile parts oil seal, so in check and disassembling require extra care, not excessive force, so as not to cause damage to parts. And then carefully check the NSK bearings oil seal and its surrounding the parts, if have shown adverse symptoms, be sure to replace the bad oil seals, can cause bearing damage, so stop thin cloud crossed roller bearing is not caused by abnormal equipment.
Lubrication is very important, not only for the thin-walled cross-roller bearings, bearings for all. But please note, bearing should not be adding too much grease.
With friction little lubricant in between two fingers, if the presence of pollutants, can feel it; or in the back of the hand is coated with a thin layer of lubricant, and then sealed optical inspection.
Thin-walled cross-roller bearings oil in addition to the old oil and, if possible, should be poured into the fresh oil and let the machine in low speed rotation for several minutes. Pollutants as far as possible so that the oil collecting residual, and then poured the oil. Note: oil in use before filtration.
While the use of thin-walled cross-roller bearing grease lubrication in the replacement of grease, used by Joe remover should avoid contact with cotton to any parts of the bearing. Because the residues of these fibers could wedge rolling pieces and caused damage, especially the application of small NSK bearing more attention should be paid to this problem.
Cause bearing seal another cause of leakage is due to improper assembly of parts or the wrong size. Valve seat in the assembly process is not completely on the surface of a light or a combination, or the valve seat sealing surface is too broad and not conducive to sealing. Elimination method is to check with the space around the spool size and uniformity, ensure the valve core hole and sealing the top surface is degree, inspection departments do not allow clearance up spool, according to drawings appropriate to reduce the effective width of the sealing surface sealing
The separation bearing installation due to the inner and outer ring can be easily mounted to the shaft or bearing seat respectively. This should arouse the attention that was already packed inner ring shaft is inserted into the outer ring of the bearing box has been installed, try to keep it together, to prevent abrasions rolling elements and raceways. Fit, the thin-walled cross-roller bearing inner ring and shaft through the outer ring of the bearing seat hole is non-separable bearing loose fit for installation,
The separation bearing installation due to the inner and outer ring can be easily mounted to the shaft or bearing seat respectively. This should arouse the attention that was already packed inner ring shaft is inserted into the outer ring of the bearing box has been installed, try to keep it together, to prevent abrasions rolling elements and raceways.
Fit, the thin-walled cross-roller bearing inner ring and shaft through the outer ring of the bearing seat hole is non-separable bearing loose fit for installation, can press the bearing first installed in the shaft, and the shaft together with the bearing mounted to the bearing hole, if the NSK bearings is small, face also can be used for metal hammer tap the force bearing ferrule is soft to, but the percussion force must be evenly distributed in the bearing ring.
The outer ring of the bearing and the bearing seat hole is tightly matched with the inner ring and shaft, as a loose fit, the bearing can be installed on the shaft.
When the thin-walled cross-roller bearing and shaft or housing bore are tight fit, the application to install a special sleeve and the bearing to the shaft or bearing seat.
When the thin-walled cross-roller bearings when the size is large, due to the installation of power required by the larger, or bearings under heavy load, the larger the interference fit the cold installation is difficult, requires the bearing inner ring or bearing seat heating after installation. In the hot state when installed, should strictly control the heating temperature. NSK bearing heating, heating temperature shall not exceed a maximum of 1200C, should be in commonly 80~1000C. The bearing can not be heated with shields or seals, otherwise it will cause the loss of lubricant. Heating can use electric induction wind, oil bath heating method.
| Product Model | Inside Diameter | Outside Diameter | Thickness |
| 7220A NSK | 100 | 180 | 34 |
| 7020C NSK | 100 | 150 | 24 |