Because many machines have complex structures, they need multiple sets of bearings, which is called combined bearing. A rolling bearing composed of two bearing structures in a set of bearings at the same time. Such as needle roller and thrust cylindrical roller combined bearing, needle roller and thrust ball combined bearing, needle roller and angular contact ball combined bearing, etc.

Among them, roller bearings are widely used. The unique feature of its design is the rolling bearing with short cylindrical, conical or waist drum rollers as rolling elements. It is mainly used in the following fields: textile machinery, printing machinery, automobile industry, household appliances, money detector. The combined needle roller bearing is a bearing unit composed of centripetal needle roller bearing and thrust bearing or angular contact ball bearing. It has compact structure, small volume and high rotation accuracy. It can bear high radial load and certain axial load at the same time. Moreover, the product has various forms of structure, wide adaptability and easy installation.