Bearings are precision components, thus require quite cautious when in use, is using a high-performance clutch bearing, if used incorrectly, could not reach the expected performance results, and easy to make SKF bearing damage.
First, the bearings should be aware of the following considerations:
1, keep the bearings and the surrounding environment clean
　Even invisible to the naked eye smile dust into the bearings, also increase the bearing wear, vibration and noise.
2 when, use installation, be careful
　Do not allow powerful punch, direct percussion with a hammer bearing is not allowed, not allowed to pass through the clutch pressure.
3, the use of appropriate and accurate installation tools
　Using special tools as much as possible, avoid using fabric and staple fiber or something.
4, prevents corrosion of bearings
Direct hand hold FAG bearings, to fully wash off hands sweat, and coated with high quality mineral oil before operation, paying particular attention to rust in the rainy season and summer.
However, in a given operating conditions, clutch bearings can be obtained relatively longer than the traditional calculation of life, particularly in the light of circumstances. These special conditions are when the clutch surface (track and clutch components) were effectively separated by a lubricating oil film and limit the pollutants may cause surface damage. In fact, under ideal conditions, the so-called permanent bearing life is possible.
Second, the service life of the bearing:
Clutch bearing life to go number (number of working hours or to a certain speed) that defines: bearing up to this life, in any ring or initial fatigue damage on the clutch (peeling or defects). However, whether laboratory tests or in actual use, can be clearly seen, looks the same bearings under the same working conditions, real life is quite different. In addition, there are several different definitions of clutch bearing "life", one of the so-called "working life", represents a bearing can be reached before the actual life expectancy was damaged by wear and tear, damage is usually not the result of fatigue, but rather caused by wear, corrosion, seal damage and other reasons.
Third, the cause of bearing damage and countermeasure of:
(A) why bearing grinding damage?
In practical applications, the only part of the bearing damage.
Most of the NSK bearings are bad for many reasons – exceeded the original estimate of load, non-effective sealing, tight fit was too small as a result of bearing clearances and so on. Any one of these factors has their special leave special damage types and shows signs of damage. Therefore, inspect the damaged shaft bearing, in most cases, you can identify its possible causes, generally speaking, one-third of bearing damage caused fatigue damage due to poor lubrication of one-third, other one-third because of pollutants into the bearing or installed improperly.
However, the damage patterns are related to industrial. For example, most of the pulp and paper industry half of bearing due to poor lubrication or pollution damage is not caused by fatigue.
(B), the reasons and countermeasures of damage:
1 too large, split load: check the load size. Correct loading. Installing bad (non-linear) check load size bearings and Institute for use again. Correct loading.
Foreign bodies penetrated 2, torque loads, water: improve the sealing device, stop rust. Improving the surface finish of the matching clutch parts. Showing a dark side with minor wear, is there in the dark on the surface from the surface to deep to 5-10m micro-cracks and minimal shedding occurs on a large scale (micro-split) fracture when installed was a hit. Improved sealing device.
3, poor lubrication, lubricant is not appropriate: use the proper viscosity of lubricants, improved lubrication method. Poor surface finish of the matching clutch parts. Foreign bodies in the lubricant. Select a suitable lubricant.
4, clutch bearing clearance is not appropriate. Bearing box bad accuracy, rigidity of bearing box does not have: check the accuracy of the shaft and housing. Check for clearance.
5, shaft deflection of rust, corrosion, abrasions and indentation checking accuracy of shaft, clutch housing. When loading conditions of bearings in rotating, inner ring, outer ring raceway surface or clutch a decent rendering fish due to clutch fatigue squamous stripping. So-called injuries are due to some minor burns from the sliding surface injuries in totals resulting from surface damage. Poor lubricant surface roughness. Stripping lubricant is inappropriate. Improving lubricant and lubrication method.
6, (surface deformation phenomena) caused by development. Foreign body of biting. Load is too large. Using bad. Improvement installation method (used and charging, using the appropriate tools folder). Clutch bearings installed, sidewall support. Fracture refers to so-called wheel flanges on rolling road or roller angle imposed shocks or excessive loads the local part and a small fracture. Hurt too much load, excessive preload.