NSK bearing the failure reasons of the big four

NSK bearings quality is better, but in use undeserved bad, here are four kinds of bearing in the use of common damage reasons and some Suggestions, if everybody can do in strict accordance with the following requirements, bearing is can use for a long time. A, tired, Accounts for about 34%) NSK bearings fatigue damage is a common way of damage. Common causes of fatigue damage might be: NSK bearing long-term overload operation; Not timely maintenance; Improper maintenance; Equipment aging, etc. Suggest you choose the appropriate bearing type, NSK bearings timely replacement of exhaustion on schedule. Second, the poor lubrication ( Accounts for about 36%) According to the survey, poor lubrication is one of the leading causes of premature failure of the bearing. Main reasons including: failure to refill lubricant or lubricating oil; Lubricant or lubricating oil filling in place; Lubricant or improper lubricant selection; Lubrication is not accurate and so on. Suggest you choose accurate lubricant or lubricating oil, use the exact lubrication filling way. Third, improper installation, Accounts for about 16%) Use brute force, when installation directly with a hammer percussion bearing to bearing damage; Is the main cause of deformation. Installation does not reach the designated position, install a deviation or failure to NSK bearings, bearing clearance is too small. Inside and outside the circle is not in uniform rotation central, resulting in different heart. Suggest you choose the appropriate or professional bearing installation tools, installed with a special instrument to detect. Four, pollution, Accounts for about 14%) Pollution can also cause premature bearing damage, pollution is refers to the NSK bearings with sand, metal scraps into the interior. Main reasons including: NSK bearing early to open the packing before use, cause pollution; When installation work environment is not clean, cause pollution; Bearing of the working environment is not clean, working medium pollution, etc. Recommend before use it is best not to unpack the bearing; Keep the installation environment clean, when installation to use the bearing in cleaning; Strengthen NSK bearing sealing device. 1, soaking method: small NSK bearings by soaking in antirust oil, oil film thickness can be controlled by the antirust oil temperature or viscosity to achieve. Make a layer of anti-rust oil on its surface adhesion method. 2, brush, brush the note evenly daub on surface of NSK bearings, don't build up, also should pay attention to prevent leakage. 3, spray method: some big rust is not suitable for oil by soaking method, generally about 0. 7 mpa pressure filtering compressed air spraying where clean air. Spray method used solvent XiShiXing rust-proof oil or thin layer of anti-rust oil. This method must be used to perfect fire prevention and labor protection. NSK bearing surface rust pretreatment method: 1, surface cleaning: NSK bearing surface cleaning must be combined with the nature and conditions of that time. Methods are usually used solvent cleaning, mechanical cleaning and chemical cleaning method. 2, the surface after dry clean dry compressed air to blow dry available filtering. Or use dryer to 120 ~ 170 ℃ temperature drying, the final use clean cloth to wipe dry. NSK bearing lubricating oil of the normal use of color is brown and dark blue. If a part, it shows that the oil blended with diesel or moisture, should be replaced in a timely manner. If dark black, it showed that the oil has been bad, must be timely replacement. The thesis& oil drops after stir in white paper ( It's best to filter paper) , form the oil stain, staining outward from the center after about 2 ~ 3 hours of gradually spread, form three concentric rings. According to the color of the three regions, size and shape can identify the state of the oil. From the lower shell oil with a little oil, besmear is on the fingers, fingers and thumb twist mill. If you have any impurity or feel oil like water without a sticky feeling, even send acerbity or have a sour taste, oil has been bad. If twist after grinding on the finger to see small shiny metal grinding, the serious wear and tear parts, engine are also shows that the oil must be replaced immediately.