The composite roller bearing is composed of axial and radial roller bearings, which reduces the bearing volume, simplifies the installation structure and reduces the manufacturing cost. The radial and axial bearing capacity of the composite roller bearing is relatively large, and the parts can be replaced easily. It is increasingly used in various gantry lifting systems.

Composite roller bearing mainly consists of the following parts:
1) Shaft head
The installation method of composite roller bearing is welding. The specific method is to weld the shaft head with a plate with a round hole, and then assemble it with the portal frame;
2) Main roller
The main roller is the main bearing body in the composite roller bearing, which mainly bears the load in the vertical direction. It is required to have strong wear resistance, corrosion resistance and impact resistance. At the same time, the main roller can also be used as a single bearing, because it is a roller bearing with a full roller structure;
3) Side roller
The side roller is the secondary bearing body in the composite roller bearing, which mainly bears the load in the horizontal direction. It also requires strong wear resistance, corrosion resistance and impact resistance. The side roller is essentially a roller bearing with no inner ring and full of needles. The inner part of the composite roller bearing is matched with the spindle head through the mandrel;
4) Cover plate
The main side roller shaft heads are installed together as a whole;
Assembly method of composite roller bearing:
The side roller is installed inside the shaft head through the mandrel, the main roller is sleeved outside the shaft head, and the cover plate is fixed by nuts at the end of the shaft head, finally fixing several parts together.

advantage:
Reduce design and production costs. High radial and axial loads are acceptable. Solid guide rail, suitable for high dynamic load and static load. The bearing capacity can be well distributed on the guide rail. The service life of bearing and guide rail is long. It can be assembled by welding bolts, which is economical and practical. The bearing parts are easy to replace.