Common spindle bearing lubrication is grease lubrication, oil mist lubrication, lubrication oil and gas, spraying lubrication and ring lubrication, etc.
   Grease lubrication without any equipment, is adopted widely in low speed spindle lubrication way.
   Dn value above 1.0 x 106 spindle, more with the method of oil lubrication, one was oil mist lubrication to lubricating oil such as turbine oil after air atomizing pressure lubrication of bearings.This way realization is easy, simple equipment, oil mist both lubrication function, and can have the effect of cooling the bearing, but the oil mist is not easy to recycle, the environmental pollution is serious, is gradually replaced by the new way of lubrication oil and gas.
   Oil-gas lubrication is a small amount of lubricating oil directly without atomized by compressed air regularly, and quantitatively along dedicated to be brought to the bearing lubrication oil and gas pipeline wall uniform area.The role of lubricating oil for lubrication, and compressed air driving and cooling lubrication oil bearing.Remain the state of separation of oil and gas, which is beneficial to oil recovery, and no pollution to the environment.Implementation of lubrication oil and gas, general requirements each bearing has a separate oil and gas nozzle, have strict requirements on bearing where jet, otherwise difficult to guarantee the lubrication effect, the effect of oil and gas lubrication is also affected by the compressed air flow rate and pressure of oil and gas.Generally speaking, the increase of air flow can improve the effect of cooling, and increase oil and gas pressure, not only can improve the effect of cooling, but also helps to lubricating oil to the district of lubrication, therefore, to improve oil and gas pressure is helpful to improve the speed of the bearing.Experiments show that the greater pressure than the conventional pressure lubrication oil and gas bearing speed increased by 20%.
   With high pressure oil injection lubrication is directly the bearing lubrication and cooling, power consumption is larger, the cost is high, commonly used in the dn value of 2.5 x 106 above ultra high speed spindle.
   Lubrication is a way of improving lubrication under ring , divided into ring under oil lubrication and oil lubrication.Implementation under the ring oil or lubricating oil and gas, oil or oil and gas from the bearing inner ring injection lubrication area, under the action of centrifugal force, lubricating oil is easy to reach bearing lubrication, so than ordinary spray lubrication and oil lubrication effect is good, can further improve the speed of the bearing, such as ordinary oil lubrication, contact Angle of ceramic ball bearing the dn value of 2.0 x 106, adopt the method of increasing oil and gas pressure dn value can be increased to 2.2 x 106, while using ring under the oil-gas lubrication can reach 2.5 x 106.