The combined roller bearing is divided into adjustable and non-adjustable according to the different structural designs.
Adjustable have gear adjustment, hex adjustment and nut adjustment.
The gear adjustment is that both ends of the side roller’s inner ring(the mandrel) are processed into an eccentric gear shape, and the connecting part of the mandrel and the shaft head is also designed as a gear shape. By adjusting the eccentricity of the gear to adjust the protrusion of the side roller, thus to adjust the height of the whole combined roller bearing.
The hexagonal eccentric adjustment is the same principle as the gear adjustment. The tail gear is hexagonal eccentric. The overall height of the composite roller can be adjusted by adjusting the hexagon. Compared with the gear adjustment, the hexagonal adjustable composite roller has higher stability and load strength.
The nut adjustment means that the side rollers are installed on the shaft frame and installed inside the shaft head. The protrusion of the shaft frame (side roller) is adjusted by the two set screws on the head of the shaft head to adjust the overall height of the bearing. Compared with the above two ways, the nut adjustment is the latest design, no need to disassemble the bearing, and the adjustment is simple, convenient and quick.
The inner ring (mandrel) of the non-adjustable side roller is cylindrical and connected with the shaft head and can be rotated. Compared with the adjustable type, this structure is suitable for precise and functionally stable equipment that does not need adjustment, and the cost is relatively low.