Bearings are precision parts, thus quite cautious attitude when in use, that is, change is to use a high-performance bearings, if used improperly, they can not achieve the expected performance, and easy to make the bearing damage. Therefore, the bearings should note the following:

First, to maintain the cleanliness of the bearing and its surroundings
Even if invisible to the naked eye smile dust from entering the bearing will increase bearing wear, vibration and noise.

Second, using the installation to be carefully
Does not allow a strong punch, does not allow direct percussion with a hammer bearings, not allowed to transmit pressure through the rolling.

Third, the use of appropriate, accurate installation tool
Try to use a special tool, try to avoid using the cloth and staple fiber and the like.

Fourth, to prevent corrosion of bearings
Hand to pick up bearing, necessary to fully wash away the sweat of the hands, and coated with high quality mineral oil and then operate, with particular attention to anti-rust in the rainy season and summer.

However, in some special operating conditions, bearings can get longer in the life of traditional computing, especially in the case of light load. These special operating conditions, when the rolling surface (track and rolling) to be an effective lubricant film separated and limit pollutants may cause surface damage. In fact, under ideal conditions, the so-called permanent bearing life is possible.

Bearing life
Life of the rolling bearing of number of revolutions (or number of hours worked under a certain speed), the definition: should occur in the bearing ring or rolling element bearings within this life, the initial fatigue damage (spalling or defect). But both in the laboratory tests or in actual use, can clearly see the appearance of the same bearing in the same working conditions, to differ materially from actual life. In addition to the bearing of several different definitions of "life", one of the so-called "working life", it means that the actual life of a bearing can be achieved before the damage from the wear and tear, damage is usually not caused by fatigue, but caused by wear and tear, corrosion, seal damage.

Why bearing grinding damage?
The only part of the bearing damage in practical applications.
The bearing of most of the pumping bad reasons - beyond the original estimate of the load is not a valid seal tight with the result of small bearing clearance. Any one of the factors of these factors have their special damage type and will leave special signs of damage. Therefore, to view the damage to the shaft bearing, its possible causes, in general, one-third of the bearing damage caused by fatigue damage, another third caused by poor lubrication can be found in most of the cases, other The third guide bearing contaminants from entering or installation not handled properly.
However, these damage types and the industry do not. Example, the pulp and paper industry is mostly semi-rather than due to poor lubrication or contamination caused by bearing damage due to material fatigue.

Countermeasure

Injury matters are the reasons for the measures
Peel load is too large. Poor installation (non-linear)
Torque load dust and debris and water.
Poor lubrication, improper lubricant
Bearing clearance is inappropriate. The precision of the bearing housing is not good, the rigidity of the bearing housing uneven
Axis deflection rust, erosion points, abrasion and indentation
(Surface deformation) caused by the development. Check the load size and re-used for the study bearing
To improve the installation method
Improved sealing devices, anti-rust shutdown.
Use the proper viscosity lubricant to improve lubrication method.
Check the shaft and bearing box accuracy.
Check the clearance.
Bearing load bearing rotation, the inner ring, outer ring raceway surface and rolling decent showing scaly stripping due to rolling fatigue.
Peeling lubricant is inappropriate.
Entry of foreign matter within the lubricant.
Lubricant bad a rough surface.
Paired scroll parts of the surface finish is not good. Select lubricant
To improve the sealing device
Improve pairing rolling surface finish of parts.
Showing the dark side, with slight wear, dark surface inside a number of small cracks in the deep to 5-10m from the surface (micro peel) and a wide range of small off
Fracture installation took a hit.
The load is too large.
Drop such as the use of bad. To improve the installation method (hot charging, use the appropriate tools folder).
Correct the load conditions.
Bearings in place, so that the ribs by the support.
The so-called fracture refers to exert music impact on the local angle of the ribs or roller raceway round or too much load a small portion of the fracture.
The card has hurt too much load, too much preload.
Poor lubrication.
Foreign objects.
The inner ring outer ring of the tilt axis of the deflection.
Axis, the accuracy of the bearing housing is bad. Check the load size.
Preload should be appropriate.
To improve the lubricant and lubrication method.
Check the shaft, the accuracy of the bearing housing.
The so-called card injury is a summary of minor burns in the sliding surface injury part of the surface damage.
Slide surface, the rolling surface of the circumferential direction of the linear scars.
Roller end of the pendulum linear scars
Near the axis of the roller face of the torus card hurt.
Abrasions high-speed light load
Acute acceleration and deceleration
The lubricant inappropriate.
Water intrusion to improve preload
To improve the bearing clearance
Use the film a good lubricant
To improve the lubrication method
To improve the sealing device
Abrasions, and then roll the pavement and rolling discuss face-to-face occurred with the summary of the rolling skid and film thermal cracking to produce tiny burn surface damage. Generated with the adhesive surface roughness.
Cracks and fissures too large amount of interference.
Too much load, impact load.
Peel some development.
The heat generated due to contact of the roller wheel and install components and fretting.
Creep caused by fever.
The cone angle of the cone axis bad.
Axis cylinder is bad.
Fillet radius of shaft steps than the bearing chamfer large Interference with bearing chamfer. The amount of interference is appropriate.
Check load conditions.
Improve the installation method.
The shape of the shaft should be appropriate.
The so-called crack roller wheel or rolling cracks of injury. If you continue to use, and will also include the crack cracks.
Cage injury bad installation (bearing the non-linear).
Using bad.
Torque load.
Shock and vibration.
Speed ??is too large, acute acceleration and deceleration.
Poor lubrication.
Rise in temperature. Check the installation method.
Check the load, rotation, and temperature conditions.
Reduce vibration.
Corrective to maintain the choice of frame.
Change the lubricant and lubrication method.
Cage injury cage deformation, breakage, wear, etc..
Column impairment.
The deformation of the side face.
Recess surface wear.
The wear of the guide surface.
Indentation metal powders foreign objects.
Assembly or during transport by the impact load is too large. Impact sleeve.
Improve the seal.
Filter lubricating oil.
Improve the assembly and use.
Biting into a small metal powder, foreign body, such as when the dent in the raceway or rotating surface.
Installation of impact, forming a concave (Brinell hardness indentation) in the rolling element spacing interval.
Wear dust and debris, rust, electrical erosion caused by development.
Poor lubrication.
Due to the rolling of the irregular movement of the body caused by skidding. Improve the seal.
Clean the bearing housing.
Fully filter the lubricant.
Check the lubricant and lubrication method.
Prevent the non-linear.
The so-called wear corrosion due to friction caused by the raceway or rolling surface, the wear of the end of the roller axis torus and the concave side of the cage.
The Lipi like point lubrication process of foreign objects.
Condensation due to moisture in the air.
Poor lubrication. Improve the seal.
Fully filter the lubricant.
Use a suitable lubricant.
In the eclipse of the raceway surface of the weak shiny dark skins like point.
Fretting poor lubrication.
Small amplitude of the swing movement.
The amount of interference is insufficient. Using the proper lubricant.
For preload.
Check the amount of interference.
Coated with a lubricant to the mating surfaces.
The two contact surfaces between the relative repeatedly tiny East wear in the raceway and rolling element contact portion.
Due to the reddish-brown and black wear powder, and thus the page that fretting corrosion.
Pseudo Brinell indentation during transport medium bearing vibration and swing in the stall.
Small amplitude of the swing movement.
Poor lubrication. Bite on the shaft and bearing housing to be fixed during transport.
Transportation to separate the inner and outer packaging.
Plus the preload to reduce vibration.
Using the proper lubricant.
During the micro-vibration in the rolling element and raceway round of the contact part due to the vibration and shaking caused by wear and tear to develop, a tired like Brinell indentation imprint.
Ground potential difference between the outer ring and inner ring of the electrical erosion. In the setting of the circuit, the current either flows through the bearing part.
The bearing insulation.
The so-called electrical erosion refers to the contact part of the flow of current in the loop of weight bearing raceway wheel and scroll through the body, sparking a thin lubricant film, the surface of the partial melting and the bump phenomenon.
Creep insufficient amount of interference or clearance fit.
Adapter sleeve fastening is not enough. Check the amount of interference,
Implementation of scotch measures.
Appropriate fastening tight sets.
Study the accuracy of the shaft and bearing housing.
Axial preload.
Fastening round the side of the raceway.
Bonding with the surface.
To meet the topcoat lubricant.
The so-called creep refers to the clearance in the bearing mating surfaces, the relative sliding between the mating surfaces, creep with leaving it emerged mirror bright or dark side, sometimes the page with the card hurt wear.
Discoloration of lubrication is bad.
Thermal state and a reflection of the lubricant oil immersion.
The rise in temperature. To improve the lubrication method.
As the temperature rises and lubricants response, roll Road wheels and rolling element and cage color.
Bad burns lubrication.
Too much load (preload too large).
Speed ??is too large.
Clearance is too small.
Water, the intrusion of foreign matter.
The accuracy of shaft, bearing housing, shaft deflection. Lubricants and lubrication methods.
The correct choice of bearings.
With bearing clearance and preload.
Improve the seal.
Check the shaft and bearing box accuracy.
Improve the installation method.
The roller wheel, rolling element and cage rapid heating in a rotating until the discoloration, softening, deposition and breakage.
Rust, corrosion, intrusion of water, corrosive substances (paint, gas, etc.).
The lubricant inappropriate.
Accompanied by water droplets due to condensation of water vapor.
Stall when the high temperature and humidity.
Transport process of heavy anti-rust bad.
Custody status is inappropriate.
Using the appropriate. Improve the seal.
Study the method of lubrication.
Stall when the anti-rust measures.
Improve the storage method.
It should be noted.
Rust and corrosion of the bearing raceway wheel rolling surface of the pit like rust, rust and corrosion.
Install the the scars installation, demolition of the inner ring, outer ring tilt installation, demolition of the impact load. Use the right tools
Stamping machine to prevent the impact load.
Installation centering mutual.


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