How to install 29340H bearings, and what is the function of the internal V groove?

Spherical roller bearings, the V groove plays an aligning role. When the shaft or shell deflects, it can automatically adjust the load and the axial load in two directions.

The situation you mentioned should not be caused by improper installation. It should be a problem with the bearing fit, resulting in bearing wear and failure. Wear failure is 

one of the common failure modes of various types of bearings. According to the form of wear, it can usually be divided into the most common abrasive wear and adhesive 

wear. 

Abrasive wear refers to the wear caused by the squeeze of foreign hard particles or hard foreign matter or wear debris on the metal surface between the working surfaces of 

the bearing and the relative movement of the contact surfaces, often causing furrow-like scratches on the working surface of the bearing. Hard particles or foreign matter 

may come from inside the host or from other adjacent parts of the host system and are sent into the bearing by the lubricating medium. Adhesive wear refers to the uneven 

stress on the friction surface due to microscopic protrusions or foreign matter on the friction surface. When the lubrication conditions seriously deteriorate, local friction heat 

is generated, which can easily cause local deformation of the friction surface and friction micro-welding. Serious The surface metal may be partially melted, and the force on 

the contact surface will tear the local friction welding point from the matrix and increase the plastic deformation.

Spherical roller bearings are equipped with drum-shaped rollers between an inner ring with two raceways and an outer ring with a spherical raceway. The center of curvature of 

the outer ring raceway surface is consistent with the center of the bearing, so it has the same alignment function as a self-aligning ball bearing. When the shaft or shell deflects, 

the load and axial load in two directions can be automatically adjusted. It has large radial load capacity and is suitable for situations with heavy loads and impact loads. Bearings 

with a tapered bore in the inner ring can be installed directly. Or use an adapter sleeve or disassembly barrel to install it on the cylindrical shaft. The cage uses steel plate 

stamping cage, polyamide forming cage and copper alloy machined cage.

For self-aligning bearings, when installing the bearing with a shaft into the shaft hole of the box, the use of an intermediate mounting ring can prevent the outer ring from tilting 

and rotating. It should be remembered that some sizes of self-aligning ball bearings have the balls protruding from the sides of the bearing, so the center mounting ring should 

be recessed to prevent damage to the balls. A large number of bearings are generally installed using mechanical or hydraulic press-in methods.

For separable bearings, the inner ring and outer ring can be installed separately, which simplifies the installation process, especially when both the inner and outer rings require 

an interference fit. When installing the shaft with the inner ring in place into the bearing box containing the outer ring, attention must be paid to check whether the inner and 

outer rings are correctly aligned to avoid scratching the bearing raceway and rolling parts. If cylindrical and needle roller bearings use an inner ring without flange ribs or an 

inner ring with a flange edge on one side, it is recommended to use a mounting sleeve. The outer diameter of the sleeve should be equal to the inner ring raceway diameter F, 

and the machining tolerance standard should be d10. Drawn cup needle roller bearings are best mounted using a mandrel.