The importance of using deep groove ball bearing grease for stability

1, anti-rust performance

The rust preventive agent is preferably insoluble in water, has good adhesion, and can form an oil film on the surface of the steel.

2, mechanical stability

If the mechanical stability of the grease is insufficient, during the operation, the structure of the soap of the grease will mechanically disintegrate, causing the grease to be destroyed, thereby losing the lubricating effect.

3, oil seal

Oil seals are necessary to protect deep groove ball bearings and lubricants from external contamination. During the operation of TIMKEN bearings, no matter whether debris or moisture can penetrate into TIMKEN bearings to prevent damage.

4, mixed grease

Do not mix incompatible greases. If two incompatible greases are mixed, the consistency will usually become soft. Finally, the TIMKEN bearing may be damaged due to the easy loss of grease.

5, the classification of oil

The consistency and lubricity of grease are affected by the operating temperature. TIMKEN bearings operating at a certain temperature must select greases with the correct consistency and good lubrication at the same temperature.

In general, the amount of grease filled in deep groove ball bearings always exceeds the actual required amount of direct participation in lubrication, in the cavity on the frame and in the bearing cover, and forms a contour on the periphery of the rolling element. During this process, the bearing temperature rises rapidly due to the resistance of the excess grease. Although most of the excess grease is squeezed out at the beginning of the run, the grease that is squeezed into the raceway attachment may still be carried by the rolling element into the raceway. In the early stages of the bearing, most of the grease is squeezed out of the raceway very quickly (less than a minute), and the build-up grease is discharged a small amount while circulating along with the bearing rotor. At this time, the bearing temperature continues to rise until the excess bearing grease is completely discharged, which can be called the running phase of the grease. According to the grease quality and filling amount in the TIMKEN bearing structure, this time may last for more than ten. Minutes, even hours.https://www.supplyforever.com/

Failure form of GCr15 bearing steel

   Bearing steel under the combined effect of complex factors, the bearing is destroyed after a considerable period of operation. There are two main forms of damage: one is contact fatigue damage. Under the action of high contact stress, after multiple stress cycles, pits are generated in the local area of ​​the working surface, so that the noise increases and the vibration increases when the bearing works. The temperature rises and the wear increases, causing the bearings to fail to operate properly. The other is wear and tear caused by relative activities. The normal form of failure of rolling bearings is usually fatigue spalling.
Fatigue failure of bearing steel includes two processes of generation and development of fatigue cracks. The initial fatigue crack is generated at a certain depth from the surface, which is exactly the same as the depth of the maximum shear stress. For bearings of normal size, the maximum shear stress should occur somewhere between 0.35 and 0.55 mm of the contact surface, depending on the load. The metal in this area first undergoes plastic deformation under the action of maximum shear stress. If the contact stress is greater than the contact fatigue limit of the material, as the number of stress cycles increases, the plastic deformation has been continuously plastically deformed, and fatigue cracking cannot be performed here due to plastic deformation. Under normal conditions, the microcracks are at an angle of approximately 45° on the surface. Fracture spalling cracks on the contact track of the rolling bearing gradually expand under repeated stress, usually along the materialhttps://www.supplyforever.com/