Good methods to add oilless bearing grease

In the practical work of oilless bushing, if add too much grease, then the higher the speed, the harmfulness, the greater the filling quantity at the same time, the more the greater the friction torque.Under the condition of the same filling amount, sealed bearing friction torque is bigger than open bearings.When the grease filling amounts to 60% of bearing internal space volume, friction torque is no longer increased obviously, this is due to open in the bearing grease has been most extrusion, but also has lost in the sealed bearing grease.With the increment of grease filling, bearing temperature rise straight line, the same filling amount, sealed bearing temperature rise is higher than the open bearings.It is generally believed that sealed rolling bearing grease filling amount, shall not be more than about 50% of the internal space, ball bearing, 20% to 30% in the most appropriate.

Grease has good adhesion, abrasion resistance, temperature resistance, anti-rust and lubrication, can improve the oilless bearing high temperature oxidation resistance, delay aging, can dissolve carbon prevent poly metal abrasive dust and oil pollution, the improved mechanical wear, pressure and corrosion resistance.But by watching the movement of grease in the bearing summary process, we did not notice: unfavorable and overmuch grease in the bearing.Add more grease not only waste, but counterproductive.