Bearings with grease lubrication and oil lubrication lubrication methods are generally divided into two kinds. Bearing function into full play, important is reduced and the use of accounts, using lubrication method.
Grease is made up of base oils, thickeners and additives lubricants. When you select, is ideally suited for needle roller bearings should be selected using criteria moisturizing oils, brand different, performance will vary considerably, select time, attention must be paid.
Sodium calcium base grease, bearing common grease grease lithium, sodium calcium base grease, grease and aluminum-base grease with molybdenum disulfide grease.
Number of filling grease in the bearings, to fill the bearing 1/2-1/3 suitable for the internal space. High speed should be reduced to one-third. Too much grease will make the temperature increased.
1, repair of the bearing: bearing cleaning: remove needle roller bearings under repair, first recorded appearance of the bearing, confirm that the residual amount of lubricant, after checking the lubricant used for sampling, wash bearings. As a cleaning agent, ordinary gasoline, kerosene. Remove bearing cleaning, heavy cleaning and light cleaning in a separate container, put metal mesh on the bottom so that bearing has no contact with the dirt container. Coarse cleaning, rotate the bearing with dirt will damage the rolling surface of the bearing, should be noted. Coarse cleaning oil, use a brush to remove grease, adhesive material, after a generally clean, fine wash.
2, bearing maintenance: good condition, for as long as possible to maintain bearing performance, maintenance, overhaul, in order to prevent accidents, it is imperative to ensure operational reliability, improved production, economy. Maintains the best machinery operating conditions operational standards, carried out on a regular basis. Includes monitoring, regular running conditions, supplementing or replacing lubricant remove the check. Maintenance matters in operation, needle roller bearings of rotating tones, vibration, temperature, lubricant condition and so on.
3, bearing maintenance and judgment: in order to determine whether removing bearings can be used, check bearing wash after. Check on Raceway surface, scroll, status of the mating surfaces, cages and wear, increased bearing clearance of injury not attributable to dimensional accuracy declined, the exception. Non-separation of small ball bearings, the inner ring support level with one hand, rotate the outer ring to confirm fluency. Sperm washing, are needle roller bearings in rotating cleaning oil, carefully cleaned. In addition, clean oil should always be kept clean.
Operating temperature grease when you select, key indicators should be dropping point, oxidation stability and low temperature performance, high temperature drop point usually used to evaluate performance, needle roller actual temperature should be below the drop point ℃ 10-20. Synthetic operational temperature should be lower than the dropping point of lubricating grease 20-30 degrees centigrade.
When choosing a grease bearing load, load needle into the small grease. Apart from penetration of small, while working under high pressure, also has a high oil film strength and extreme pressure properties.
Environmental conditions when selecting a grease calcium base grease are not easily soluble in water, less suitable for drying and moisture environment.



Other News:
Needle is not properly lubricated the burn problem
Ten points of measurement of rolling bearing
For needle roller bearings and shaft combined with detection
Self seal structure of cylindrical roller bearing 5 critical requirements
Main factors affecting the vibration of rolling bearing vibration screen
Bearing grease selection tips
Self-aligning ball bearing method of injury countermeasures and check processing
Tapered roller bearings the basic judgement of the quality approach