What is the symbol for the type of tapered roller bearing? 

Design features of tapered roller bearing

The type designation for a tapered roller bearing is 30000. A tapered roller bearing is a split type bearing. As a rule, especially within the dimensions covered by standard GB/T 307.1-94 “Rolling bearings. Radial bearings. Tolerances", the outer ring and the inner assembly of the tapered roller bearing are completely interchangeable. The outer ring angle and outer race diameter are already standardized as are the overall dimensions. They are not permitted to be modified during design or production. Thanks to this, the outer ring and inner assembly of the tapered roller bearing can be interchanged throughout the world.

Tapered roller bearings are designed primarily to carry combined radial and axial loads with a predominant radial load. Compared to angular contact ball bearings, they have a higher load capacity and a lower maximum speed. A tapered roller bearing is capable of supporting an axial load in one direction and limiting the axial displacement of a shaft or housing in one direction.

Tapered roller bearings mainly support combined radial and axial loads with a predominance of radial loads. The load-bearing capacity of a bearing depends on the angle of the outer ring raceway: the larger the angle, the higher the load-bearing capacity. This type of bearings is a split type bearing; Based on the number of rows of rolling elements, they are divided into single-row, double-row and four-row tapered roller bearings. The clearance of single row tapered roller bearings must be adjusted by the user during installation; The clearance of double-row and four-row tapered roller bearings is already set at the manufacturer in accordance with customer requirements and does not require adjustment by the customer.