In the process of using NSK bearings, grease is critical. If, the use of the metamorphic grease of not only lose due effect, but to still can damage NSK bearings.

1. The illumination method
When the weather is fine day, with a screwdriver NSK bearing grease will be pulled up, and the horizontal plane into 45 degree Angle. Controlled sunshine, observation oil droplets, on the illumination, can be seen clearly have no bearing grease honing for good, can continue to function, if too many honing, should be replaced lubricating oil.

2. The oil droplets trace method
Get a clean white filter paper, drops of oil in few drops of filter paper, wait for after oil leakage, if the surface has black powder, touch have resistance acerbity feeling, show lubricating oil has many impurities inside, good oil without powder, with the hand feels dry and smooth, and yellow trace.

3. Commercial observation
Take two cups, one of which filled the NSK bearing grease need to be checked out, and the other an empty on the desk, will be filled with oil's cup lifted from 30-40 cm desktop and tilt, let NSK bearing grease slowly flow to empty cup, observe the flow condition, quality good oil duct is a slender, should be uniform, continuous, if appear, fast and slow commercial, or down large, the said oil already metamorphism.

4. Hand twist law
Will NSK bearing grease in his thumb and forefinger twined between repeated grinding, a good oil hand feel lubricity, honing, no less friction, if feel the sand between fingers and friction are larger, indicates that lube impurities, can't use, should replace new lubricating oil.

(a) NSK bearing the role of lubrication for lubrication of rolling bearing fatigue life and friction, wear, normal temperature, vibration, etc., have an important effect on, no normal lubrication, NSK bearings can't work. Analysis shows that the cause of the bearing damage, about 40% of the bearing damage with bad lubrication all relevant. Therefore, the good lubricating bearing is to reduce the friction and wear NSK bearing the effective measures.

(2) grease lubrication oil lubrication and the comparison of the lubrication method of NSK bearing grease lubrication roughly divided into oil lubrication and two. In order to give full play to the function of the NSK bearings, important is according to use to reduce and the objective of use, the lubrication method.

(3) grease lubrication grease is by the base oil, thickener and additives of lubricant. When when the choice, should choose is very suitable for NSK bearing conditions of use the embellish grease, due to the different trademark, the performance will also have very big difference, so in a choice, must pay attention to.

(4) the choice of grease according to the working temperature choice grease, main index should be dropping points, oxidation stability and low temperature performance, drop point can be used for evaluating the performance of high temperature commonly, NSK bearing the actual working temperature drop point should be less than 10 to 20 ℃. The use of synthetic grease temperature drop point should be less than 20 to 30 ℃.

(5) oil lubrication in high speed, high temperature conditions, has not timely grease lubrication oil lubrication can be used. Through the cycle of lubricating oil, can take a lot of heat. Viscosity is an important characteristic of lubricating oil, the size of the viscosity of oil directly influence the liquidity and formed between the friction surface of the oil film thickness, NSK bearings working temperature lubricating oil viscosity is generally 12-15 CST.

(6) solid lubrication in some special use conditions, a solid lubricant grease to join in, such as join three to 5% of the no. 1 mos2 can reduce wear, improve the compressive heat-resisting ability, for high temperature, elegant, high vacuum, corrosion resistance, resistance to radiation, and extremely low temperature, and other special conditions, the solid lubricant to join engineering plastic or powder metallurgical materials, can be made with the NSK bearing the lubrication performance parts, if use adhesive bonding solid lubricants roll in the way, and maintains a and roller forming lubrication film, to reduce the friction and wear a certain effect.

(7) lubricant of complement and replace a. grease time interval of added due to mechanical function, aging and the increase of pollution, NSK bearings in the configuration of the lubrication in they will gradually lose the lubrication performance. Therefore, the need to constantly supplement and lubrication rank update. Add lubricant to the time interval of NSK bearings for, the formation of the size and rotary speed and different, according to the operating time of need to replenish the grease roughly time interval.




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