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In order to ensure the security and reliability, no matter how long should always check the age of car bearing, pay attention to whether the early warning signal wear: including any friction noise during rotation or hanging combination wheel when cornering speed is not normal.
The following point of view will appear warning, prompting fault we will happen:
The 1 part such as hear noises, first of all, it is important to find the position of noise. There are many possible noise of the moving parts, it may also be some rotating parts and no rotating parts have contact. If the confirmation is the bearing of noise, may be damaged, need to be replaced.
2 because the first cause similar on both sides of the working condition of failure, so even a bad one, also suggested that pairwise substitution.
3 is more sensitive, in any case, need to adopt the correct methods and appropriate tools. In the process of storage and transportation and installation, bearing parts can not be damaged. More pressure, so the need for special tools. Be sure to reference manual.
4 installation should be in a clean environment, the service life of small particles into the also shortens bearing. Keep the environment clean replacement is very important. Not allowed to use a hammer percussion, careful not to fall on the ground (or similar misconduct). Before installation should also examine the conditions of the shaft and the seat, even minor wear will lead to poor fit, thus causing damage.
5 don't attempt to disassemble or adjust the sealing ring, otherwise it will make the seal damage leads into the water or dust. Even the rolling way sealing ring and the inner ring have been damaged.
6 with the ABS sealing ring has a magnetic thrust ring thrust ring, this cannot be subject to impact or collision, and other magnetic phase collision. Out of the box before installation, make them far away from the magnetic field, such as the use of motor or electric tools.
7 many of the bearing is sealed, in the life time is not need to add the lubricating grease. Other seal such as double row tapered roller in the installation must grease lubrication. Because of the size of the inner cavity is different, so it is difficult to determine how much oil, if the oil too much, when the bearing rotates, excess fat will exudation. Rule of thumb: when in installation, the amount of fat to account for the gap of 50%.
| Product Model | Inside Diameter | Outside Diameter | Thickness |
| 7007A NSK | 35 | 62 | 14 |
| 7907C NSK | 35 | 55 | 10 |