In terms of design, the inner ring of the tapered roller bearing, the raceway surface of the outer ring and the cone apex of the roller converge at one point on the central axis of the bearing. The rollers of the cone type are assembled in the bearing as rolling elements and are guided by the large rib of the inner ring. It can bear radial load and axial load in one direction. When the load acts on the bearing, an axial component force will be generated. Therefore, like angular contact ball bearings, two bearings are generally used opposite to each other, or must be used in the form of double row bearings. In this case, the proper internal clearance can be set by adjusting the distance between the inner ring or the outer ring. Because it is separable, the inner and outer rings can be removed separately. As a high load capacity bearing, there is also HR series with increased roller size and number of rollers. According to the different contact angles, it can be divided into common cone angle bearings, medium cone angle bearings and large cone angle bearings. According to the number of rows of rollers, it can be divided into double-row and four-row tapered roller bearings. In general, steel stamping cages are used, and large-size tapered roller bearings also use pin shaft cages. NSK Metric Series Tapered Roller Bearings For the metric series of medium-tapered bearings and large-tapered bearings, the contact angle codes C and D are respectively recorded behind the inner diameter code. Ordinary tapered angle bearings are not marked with contact angle codes, and medium tapered angle bearings are mainly used for pinion shafts of automotive differential devices. In the HR series with high load capacity, the bearings marked with J in the basic code have the width of the outer ring, the diameter of the small end face of the raceway of the outer ring and the contact angle consistent with the provisions of ISO. Therefore, the inner ring assembly (CONE) and outer ring of bearings with the same basic code marked with this code are internationally interchangeable. Among the tapered roller bearings in the metric series specified in ISO355, there are new dimensions that do not conform to the 3xx dimension series used in the past. Some of them are described in the dimension table. The width of the outer ring, the diameter of the small end face of the raceway of the outer ring and the contact angle are consistent with the provisions of ISO, and the components of the inner ring and the outer ring are internationally interchangeable. Its model is different from the conventional metric series, and its composition is as follows. In the NSK inch series tapered roller tapered roller bearings, there are also inch series besides the metric series. The inner ring components and outer rings of the inch series bearings other than the four-row tapered roller bearings have their own codes, and the bearing model composition is roughly as follows. The structure and characteristics of NSK double row tapered roller bearings are paired double row tapered roller bearings and double row tapered roller bearings. NSK Double Row Cylindrical Roller Bearings (High Rigidity Series) use new materials and new designs to improve the performance of machine tools. 1. Realized high speed and low heat generation. 2. Realized the long service life of grease lubrication. 3. High-rigidity PPS resin cage is used to suppress deformation caused by centrifugal force and realize high-speed and stable rotation. NSK Single Row Cylindrical Roller Bearings (Standard Series) This is the basic series of NSK precision single row cylindrical roller bearings with ISO as the standard. 1. Adopt long-life bearing steel (Z steel) as the standard material. 2. Adopt high-rigidity rolling element-guided copper alloy cage. NSK single row cylindrical roller bearings (Robust series) use high heat-resistant PEEK cages, and the main body uses SHX material with excellent heat resistance and wear resistance, achieving a high speed of dmn2.2 million. 1. Low heat generation is realized by adopting the optimal design. 2. The main body is made of SHX material, which improves the seizure resistance, and the rollers are made of ceramic material, which improves reliability. 3. Adopt heat-resistant and high-rigidity PEEK resin to achieve high speed.
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