Ball screw pairs can be lubricated to improve wear resistance and transmission efficiency. Lubricants are divided into two categories: lubricating oil and lubricating grease. Lubricating oil should be engine oil, 90-180 grade turbine oil, or 140 grade spindle oil. Lubricating grease can be lithium based grease. Lubricating grease is added to the threaded raceway and the housing space where the nut is installed, while lubricating oil is injected into the nut space through the oil hole on the housing.