There are many experienced masters who know that no matter whether it is a large truck, a car or a motor drive shaft in a processing plant, if the area involved in overturning and friction requires lubrication, grease is required. Grease alias butter, from the name we can see that it is used for lubrication. What common sense should be paid attention to when using grease?

　　Grease is widely used because of its heat resistance, oxidation resistance, long life characteristics and unique adhesive paste characteristics.

　　1. How will the quality of grease change during use? How to visually identify it?

　　The grease is exposed to environmental factors such as gas, water, smoke or other harmful substances in the working components, and the relative movement of the components during the work causes mechanical equipment forces such as stamping dies, breaking, etc., which will produce two levels. The transformation of:

　　1. Physical state change: The grease structure is lowered or even destroyed due to the action of mechanical equipment, the consistency of the grease is reduced, and the actual effect of lubrication is reduced, or because the sealing standard of the lubricating components of the mechanical equipment is not very good, the grease is infiltrated into Panax notoginseng soil, Impurities and moisture reduce the quality of grease.

　　2. Chemical reaction: Grease components (base oil, thickener) are likely to undergo air oxidative deterioration due to the action of density, heat and air. After the base oil is oxidized by air, it is converted into a small amount of citric acid, aldehyde, Components such as ketones and lactones, oleic acid in the thickener, and metal salts of organic chemistry may dissolve and produce a small amount of citric acid. Corrosion until it rusts and loses lubrication and safety protection.

　　Second, what is the appropriate amount of grease added to the rolling bearing?

　　The amount of grease added has a great influence on the operation of the rolling bearing and the amount of grease used. Adding too much grease to the rolling bearing will expand the friction torque of the rolling bearing, cause the rolling bearing to heat up too high, and cause the loss of grease. On the contrary, insufficient or too little filling is likely to cause dry friction of the rolling bearing and damage the rolling bearing.

　　In general, when rolling bearings are filled with grease, the temperature rises. And adding too much grease will continue to cause unnecessary grease to be lost from the lubricating parts, which will adversely affect the operation of mechanical equipment. Therefore, the filling of grease should not be too much or too little.

　　Third, what are the regulations for automotive grease?

　　The automotive grease is mainly used for the grease of the rolling bearing of the vehicle. The natural environment in which the car operates is constantly changing, and rolling bearings are often subjected to various effects such as high and low temperature tests, water spray, smoke, heavy load, impact, friction, etc. Therefore, the grease needs to have the following many foundations to solve this working condition characteristic:

　　①Withstand extreme pressure or impact load, the four-ball machine has good extreme pressure.

　　②Good heat resistance, high dropping point (>260℃), excellent cold resistance.

　　③Water-soluble, anti-rust treatment, anti-corrosion, good oxidation resistance, dust-proof.

　　④Excellent adhesion properties, high speed without oil rejection.