Roller Ball Bearing Lubrication

- Feb 13, 2019 -

Roller ball bearing lubrication

Roller ball bearing lubrication

   Roller ball bearings are generally well lubricated. Greases have good adhesion, wear resistance, temperature resistance, rust resistance and lubricity. They can improve high temperature oxidation resistance, delay aging, and dissolve carbon deposits. It prevents the agglomeration of metal chips and oil stains and improves the wear resistance, pressure resistance and corrosion resistance of the machine. After understanding the movement of the grease in the bearing, it is natural to conclude that the grease in the bearing should not be excessive. More grease is not only wasted, but also harmful.

Roller ball bearing lubrication

needle roller bearings

    The higher the rotational speed of the bearing, the greater the hazard. The more grease is filled, the greater the friction torque. With the same filling amount, the friction torque of the sealed bearing is larger than that of the open bearing. After the grease filling amount is equivalent to 60% of the internal space of the bearing, the friction torque is no longer significantly increased. This is because most of the grease in the open bearing has been extruded, and the grease in the sealed bearing has also been lost. As the filling amount of the grease increases, the temperature rise of the bearing increases linearly, and the same filling amount, the temperature rise of the sealed bearing is higher than that of the open bearing.

needle roller bearings

    It is generally believed that the grease filling capacity of sealed rolling bearings should not exceed 50% of the internal space. Tests by Shawki and Mokhtar have shown that ball bearings are most suitable from 20% to 30%. Of course, in order to determine the most suitable amount of grease filling, sometimes other factors should be considered. For example, for some open bearings that work in dusty or very humid or even steam-contact environments, you can also fill more grease to give a better seal and protect the bearings from dust or moisture. Invasion.

needle roller bearings


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