What are the requirements of one way sprag clutch bearing in the selection of grease?
The one way sprag clutch bearing is a special lubricating oil for unidirectional slant clutch bearing of precision machine tools and similar equipment. It plays a very important role in ensuring the working accuracy and service performance of the spindle and prolonging its service life. It is also called bearing oil. So what are the performance requirements of one way sprag clutch bearing lubricating oil in the selection?
1, Good lubricity
To make one way sprag clutch bearing with uniform oil film bearing between the contact surface, and in the main shaft impact load of oil film start or stop the movement also not dent, keep good lubrication performance, play a reduce friction and friction heat, lowering the temperature rise of the main shaft, ensure the machining accuracy, oil has good lubricity.
2, Good rust resistance
Because the oil will inevitably be mixed with condensed water in the air or machine coolant in the working process of the main shaft lubrication system of the one way sprag clutch bearing, the oil is required to have good rust resistance, especially in the humid and hot climate areas in the south, especially to pay attention to its rust resistance.
3, Good oxidation resistance
The main sleeve of the machine tool is lubricated by circulation. The one way sprag clutch bearing oil is required to be used for a long time without changing, so as not to block the oil path and bearing clearance and produce small corrosion due to the production of swimming mud. Therefore, the oil is required to have good oxidation stability. The oxidation stability index of the oil is required to be 1000h(GB/T, 12581) in China's industry standard.
4, Suitable strength and good temperature characteristics
For the use of machine tool main uranium from high temperature and thermal deformation in the machine tool, affect the machining accuracy or make poor bearing lubrication, should be based on one way sprag clutch bearing structure, speed, and bearing clearance to choose a suitable doneness of lubricating oil Wells for oil has good temperature characteristics show concern and prevent a spindle working temperature and environmental temperature change is big, The change of degree is too large to affect the lubrication performance.