Composite bearings (composite roller bearings) major components:
1) spindle head
Installation of composite roller bearings welding, concrete way is to shaft and head with a circular hole plate welding, and then the door frame assembly;
2) Main Roller
Main Roller composite roller bearings in the main carrier, the main load bearing vertical direction, requires a strong resistance to abrasion and corrosion resistance, impact resistance. While the main wheel bearing can also be used alone as a single direction, because it is itself a full roller wheel bearing sub-structure;
3) side of the wheel
Combined bearings upper roller is in a secondary carrier, mainly bear the load in the horizontal direction, also requires a strong resistance to abrasion and impact resistance corrosion resistance. Side wheel is essentially a full complement without inner needle roller bearings, roller bearings inside the composite is mated together by the mandrel and the shaft head;
4) Cover
The main side of the wheel spindle head mounted together, as a whole;
Composite roller bearing assembly method:
Side roller through the spindle head mounted on a shaft inside the main wheel sets in the first external shaft, head cover in the rear axle nut is fixed, eventually several parts together.