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Vehicles should be within the scope of the rated load, if serious overload overloading will lead directly to bearing, bearing early failures, more serious may result in personal safety breakdowns and accidents;
Prohibition of bearing abnormal impact loads;
Periodically check the bearings used, observe the bearing parts if there is abnormal noise and local temperature rise sharply;
Quantitative add oil or grease regularly and as required;
According to the vehicle use conditions, at least once every six months to completely replace lubricating oil, and careful checking of bearings;
Bearing maintenance condition check: bearing removed with kerosene or gasoline to clean, look closely at the bearings inner and outer cylinder with sliding or crawl, bearing Raceway surface inside and outside presence of flaking, pitting, rolling elements and cage for wear and deformation, depending on the bearing checked and integrated, determine whether the bearing can continue to be used.
| Product Model | Inside Diameter | Outside Diameter | Thickness |
| NNU4938MBKRCC1P4 NSK | 190 | 260 | 69 |
| NN4938MBKRCC1P4 NSK | 190 | 260 | 69 |