What are the classifications of the most common full-roller bearings without an outer ring? Full roller bearing without outer ring is a rotating bearing that uses short cylindrical, conical or waist drum rollers as the rotating body. There are mainly short radial cylindrical rollers, double row radial spherical rollers, tapered rollers and thrust rollers. Full complement of roller bearings without outer ring Classification Cylindrical roller bearings This type of roller is mainly used in cylindrical roller bearings, and the roller assembly can also be used directly in machinery. These rollers have been standardized in size and can be used as commodity rollers for design and user selection. Long Cylindrical Roller Bearings This type of roller is divided into two types: shaft diameter and no shaft diameter. It is mainly used in long cylindrical roller bearings, and the roller assembly can also be used directly in machinery. Needle roller bearings are mainly used for needle roller bearings, universal joint needle roller bearings and thrust needle roller bearings. Needle roller assemblies can also be used directly in machinery. This type of roller has been serialized in size for design selection. According to the needs of the bearing layout, the two-end head styles of the needle rollers are conical, flat, round, etc. Tapered roller bearings are circular truncated cones, and their taper angles are usually 1° to 4°20', and some are less than 1° or greater than 4°20', mostly 2°. The length of the roller is generally not more than twice the diameter of the large end of the roller. This type of roller is mostly used in tapered roller bearings, and rollers with large taper angles are basically used in thrust tapered roller bearings. The rotating surface of the rollers of spherical roller bearings is spherical. Bearings that accommodate such rollers are self-aligning and can withstand very large loads. Spherical rollers are divided into asymmetric type and symmetrical type. Generally, the large end face of the asymmetric shape is a spherical surface, and the two end faces of the symmetrical shape are flat end faces. Symmetrical spherical rollers have better performance, while asymmetrical ones are eliminated. These types of rollers are used in spherical roller bearings and thrust spherical roller bearings. Spiral roller bearing is an empty roller made of steel strip with special section, which is divided into left-handed and right-handed. This type of roller is not very widely used and is mainly used in helical roller bearings with shock loads. Pillar hole roller bearing The center of the pillar hole roller has a through hole, which is used to install the pillar, so as to remain on the sheet-shaped pillar connecting frame. This type of roller has cylindrical, conical and spherical shapes, and is mainly used for extra-large bearings.
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