The gears of the machine tool have little impact and vibration, and the load is small. Generally, it is not necessary to use lubricating oil containing extreme pressure additives. It is necessary to pay attention to how to prevent the thermal deformation of the headstock. For the gears of punching or shearing machines with large impact loads, gear oils containing anti-wear agents should be used for gear oils that are lubricated by lubrication or oil bath, except for consideration. Anti-oxidation, but also anti-corrosion, anti-wear, anti-corrosion and anti-foaming. Choose the right gear oil and the right viscosity depending on the type of gear. Rolling bearings are used on machine tools because of their small friction coefficient and quiet operation. Therefore, rolling bearings have been widely used on machine tools, and forced lubrication or spray lubrication is applied.
It should be noted that in addition to the large and rough special conditions of rolling bearings, it is generally not possible to use grease containing solid lubricants. Sliding bearings are commonly used transmission methods. Lubricating oils not only need to play a role in lubrication but also play a role in cooling. Therefore, it is necessary to use low-viscosity lubricating oil with good lubricating properties, and at the same time, it needs to have good anti-oxidation and anti-wear properties. Rust and foam resistance. For precision sliding bearings used in grinding stone spindles for precision grinding machines, lubricating oils with a very low viscosity and excellent oil resistance of 2.0 mm 2 (40 ° C) should be used.
The top of the machine is a special type of bearing. The fixed top load is not large. Nowadays, high-speed machine tools use rotary tops and heavy load, so they are sealed with grease. (end). The load and speed of the guide rail vary greatly. Generally, the load on the guide rail surface is 3-8N/cm2. However, due to frequent repeated movement of the guide rail, boundary lubrication is easily generated, and even semi-dry lubrication causes creeping, except for machine tool design and materials. Poor lubrication is the main cause of crawling.
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