Through a variety of heat treatment, chemical treatment and the surface hardening treatment, can improve the strength and wear resistance of the bearing. Especially steel, and only after the heat treatment in order to fully display its superior mechanical properties. Alloy steel bearing stress concentration sensitivity is high, so the shape of the structure steel shaft must be reasonable, otherwise we lose the meaning of alloy steel. In addition, under normal operating temperature, alloy steel and carbon steel elastic modulus is very close, so rely on used steel to increase the stiffness of the shaft is not enough, this time by increasing the shaft should be other ways to solve. NSK Bearings authorized ductile iron and high-strength cast iron lower mechanical strength than carbon steel, but the casting process, and easy to get a more complex shape, vibration absorption, abrasion resistance, low sensitivity to stress concentration, inexpensive, Therefore, the growing number of applications.
Many of the bearings are sealed, these bearings are not needed throughout the life of the grease in. Other non-sealed bearings such as double row tapered roller bearings in the installation must be added grease. Since the bearing cavity sizes, it is difficult to determine how much oil plus the most important thing is to ensure NSK bearings with grease if too much oil when the bearing rotates excess oil will bleed. General Experience: At installation time, the total amount of oil to account for 50% of the bearing clearance.
1, through the surface bearing quality feeling
I'm in the process of selling bearings found that many customers say as long as the bearing surface brightness is of good quality, which is wrong. Bearing surfaces should be kind of bright glossy black, glossy black reasons causing this steel used NSK Bearings whether the target and it's used for grinding and cutting fluid, etc. generated, which dominated the previous two.
2, chamfer is bright
Bearing chamfer does not determine the quality of the bearing, but reflects the processing method of the bearing. Chamfer is black, shows that, after hardening heat treatment, thus increasing the hardness of the bearing, and some people think that the chamfer is black does not look good is not processed completely, this is a misunderstanding.
3, one of the cage than two body good, although the use of new technology are integrated cage, but it is only saves material, while rotating, worse performance than the two bodies.
Overall, NSK bearing life has a relationship with the three factors, namely the quality of the bearing itself. Second, the use of the environment. Third, the installation method.
Equipped with ABS unit bearing seal ring has a magnetic thrust thrust ring can not be such a collision, impact or collision with other magnetic fields. Before installation remove from the box, so that they stay away from magnetic fields, such as the use of electric motors or electric tools. These bearings are mounted, through the observation of the dashboard road test needle ABS warning to change the operation of the bearing.
In order to ensure maximum safety and reliability, we recommend that you no matter how long the age of the vehicle should always check the bearings - Note NSK Bearings for wear early warning signals: includes any grinding noise when turning wheel in a turn or suspended without portfolio normal deceleration.


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