Flat pliers and precision flat pliers mainly use liquid lubricants, and sometimes semi solid and solid lubricants can also be used. Generally speaking, lubricants can be divided into four basic types: gas, liquid, semi solid, and solid. Gases such as air, hydrogen, and nitrogen are used as lubricants, and the most commonly used is air.
The lubricant can cool, wash, and rust the friction pair. In reciprocating motion, lubricants can play a buffering and anti vibration role. Grease is a lubricant with a self sealing effect, which can prevent air and liquid leakage. Semi-solid lubricants mainly include various lubricating greases, which are stable mixtures of lubricating oils and thickeners. Solid lubricants refer to substances that can form a solid film to reduce frictional resistance. Such as graphite, molybdenum disulfide, etc. Lubricants are widely used in liquid lubricants, including mineral oils, animal and vegetable oils, synthetic oils, and various emulsions.