The load of the roller bearing is very large, and the sliding speed is low and the temperature is high. Therefore, bearing wear resistance, bearing capacity, long service life, easy to manufacture and installation.
Rolling mill roller bearings are mainly used two types of sliding bearings and rolling bearings.
1 sliding bearing
This is a type of roller bearings widely used at present. The utility model has the advantages of simple structure, convenient manufacture and low cost. Lubricant for plain bearings is dry or thin. Cast iron or cast steel bearing material of sliding bearing, the tensile strength of not less than 200Mpa, HT200 cast iron; bushings with metal (bronze) or non metal (MC nylon) manufacturing. The nylon bushings disadvantage is poor thermal conductivity, thermal expansion.
2 rolling bearing
In recent years, the use of double row roller bearings. The utility model has the advantages of long service life, small friction loss, energy saving, convenient installation and easy maintenance, and the lubricating oil consumption can be reduced by 75% compared with that of the common sliding bearing. But the cost is high, supporting difficulties, use less.