Four column cylindrical roller bearings are widely used rolling bearings with high radial load capacity and good operating accuracy. They are commonly used in equipment such as rolling mills and heavy machinery that require high load capacity and accuracy. The following is a detailed introduction to four column cylindrical roller bearings:
Structure type:
FC type: It belongs to separable bearings, and the overall inner ring can be separated from the entire set of bearings, with high limit speed and interchangeability. The holder is a machined brass holder. Generally, four column cylindrical bearings with an inner diameter of 80mm<260mm are designed with this structure, mainly used for the working roll parts of cold rolling four roll, six roll, and twelve roll mills.
FCD type: It is also a separable bearing, with a lower degree of separation compared to FCDP structure. The only difference is that the two inner rings can be separated from the entire bearing, but it has a higher limit speed and interchangeability. The retaining frame is a machined brass or steel retaining frame. This type of bearing is not only suitable for high speeds (35m/s), but can also withstand heavy loads simultaneously. Generally, four column cylindrical bearings with an inner diameter of 260mm<400mm are designed with this structure and are commonly used in profile finishing mills, high-speed wire roughing, intermediate rolling, and pre finishing rolling parts, including the support roll, intermediate roll, and working roll parts of cold-rolled non-ferrous and black metal rolling mills below 950.
FCDP type: It is a typical rolling mill roll diameter bearing, with parts that can be separated from each other, high-precision position interchangeability, and easy installation, disassembly, and cleaning. Within a given installation space, it can provide maximum radial bearing capacity and has a low friction coefficient. Generally, the cage for four column cylindrical bearings with an inner diameter of over 400mm is designed as a pin through cage. This cage consists of two washers for lateral limiting rolling elements and a support column that connects the two washers and passes through the center of the roller. Finally, the two ends of the support column are fixed to the washers by argon arc welding. The cage has high strength and is suitable for high-speed, heavy-duty, and harsh working environments at the roll diameter of rolling mills.
characteristic:
High load-bearing capacity: Due to the four columns of cylindrical rollers sharing the load, it can withstand large radial loads. Compared with other types of bearings, it has obvious advantages in radial load-bearing and can meet the working requirements of heavy machinery and equipment.
High precision: The contact accuracy between the roller and the raceway is high, which can ensure the stability and accuracy of the bearing during operation, reduce equipment vibration and noise, improve equipment efficiency and product quality.
Separability: The inner and outer rings, rollers, and other components of the bearing can be separated for easy installation and disassembly, as well as for the maintenance and upkeep of the bearing. During the installation and maintenance process of the equipment, each component of the bearing can be inspected and replaced separately, reducing maintenance costs.
Lower friction coefficient: The rolling friction coefficient between the roller and the raceway is relatively small, which can reduce energy loss and improve the energy utilization efficiency of the equipment.
Application areas:
Metallurgical industry: Four column cylindrical roller bearings are widely used in the support parts of rolling mills to bear the radial load of rolling mills and ensure the smooth progress of the rolling process. For example, in equipment such as hot rolling mills, cold rolling mills, and profile rolling mills, four column cylindrical roller bearings are key components.
Mining machinery: Mining machinery typically operates in heavy and harsh environments, with high requirements for bearing capacity and reliability. Four column cylindrical roller bearings can meet the working requirements of mining machinery, such as crushers, ball mills, hoists, and other equipment whose main shafts can use four column cylindrical roller bearings.
Large machine tools: The spindle of large machine tools needs to withstand large radial loads and certain axial loads. The high load-bearing capacity and high precision characteristics of four column cylindrical roller bearings make them suitable for spindle support of large machine tools.
Wind power generation equipment: The main shaft and gearbox of wind turbines require bearings to support and transmit power. The reliability and long service life of four column cylindrical roller bearings have made them widely used in wind power generation equipment.