NSK bearings for lubrication, especially the fatigue life of rolling bearing, friction and wear, normal temperature, vibration, etc., have an important influence. No normal lubrication, bearing can't work. NSK bearing the cause of damage show that about 40% of the bearing damage with bad lubrication all relevant. Therefore, NSK bearing of the good lubrication is to reduce the friction and wear bearing the effective measures.

In addition, NSK bearing the lubrication and cooling, rust and sealing, moderate impact on many kinds of function.

NSK bearing lubrication role can explain briefly as follows

A. in mutual contact surface or two scroll between sliding surfaces form a layer of oil film the two surface is separated, reducing the contact surface of the friction and wear.

B. by oil lubrication, especially the circulating oil lubrication, oil mist lubrication and spray lubricating oil, lubricating oil can take away most of the internal friction bearings heat, have effective cooling effect.

C. the grease lubrication, can prevent external dust and foreign body in bearing, have closed role.

D. lubricants have prevent metal corrosion in the role.

E. NSK bearing extend the fatigue life.

One, to install the surface and installation site requirements
If there were scrap iron and bearing burr, dust and foreign body in, will make bearing in operation noise and vibration, and even will damage the groove and rolling body. So, in the installation of bearings front, you must ensure that the mounting surface and installation environment clean.

Second, the bearing should be cleaned before installation
Bearing is coated with temporary, you must use clean gasoline or kerosene careful cleaning, besmear again clean quality or high speed high temperature to lubricate the grease can install and use.
 
Cleanliness NSK bearing life and to the influence of the vibration noise is very big. But we would like to remind you is: fully enclosed bearing need not cleaning refueling.

Three, the choice of grease

NSK bearing operation for lubrication and life has an important influence, here you choose to briefly introduced the general principle of grease. By base oil, grease thickening agent and additive.it, different species and the same kinds different type of grease performances are very different, allow rotation limit different, when the choice must pay attention. The performance of the grease mainly by base oil decided, generally low viscosity base oil is suitable for low temperature, high speed, high viscosity suitable for high temperature, high load. Thickener also relates to the lubrication performance, thickener water resistance decided to grease water resistance. In principle, the sign of the different grease can not be mixed with, and even the same thickener grease of, because different additive has a bad influence on each other.

Four, grease to add

Lubricating bearings, oil coating the more the better, this is a common mistake concept. NSK bearings and bearing indoor much oil will cause excessive oil mix, which generate a high temperature. Bearing the number of filling lubricant to fill the internal space of the bearing 1/2-1/3 advisable, high speed should be reduced to a third.

Five, the bearing of the installation and removal

When installation NSK bearing not directly hammer the face and the bearing surface, should press block, sleeve or other installation tools make uniform bearing force, not through the rolling body momentum installation. If the installation surface besmear lubricating oil, will make install more smooth. Such as interference with larger, the bearing should be put in mineral oil heating to 80 ~ 90 in ℃ as soon as possible after installation, strictly control the oil temperature not over 100 ℃, in order to prevent the tempering effect reducing the size and influence of hardness recovery. When removing the encounter difficulties, suggest you use to remove the tools of pulling out to both the inner circle of caution on JiaoSa hot oil, heat will make bearing inner circle inflation, making it easier to fall off.

Six, bearing radial clearance choice

Not all NSK bearings are required minimum work clearance, you must choose the right according to the condition of the clearance. Gb 4604-93, rolling bearing radial clearance is divided into five groups-two groups, 0 group, the three groups, 4 group, five groups, clearance in value from small to big, with zero group for the standard clearance.
 
Basic radial clearance group applicable to the general operation conditions, conventional temperature and the commonly used over surplus cooperation; In high temperature, high speed, low noise, low friction under special conditions such as work is appropriate chooses the bearing of radial clearance; For precise spindle, with NSK bearing spindle and appropriate chooses the smaller radial clearance; For roller bearings can keep a small amount of work clearance. In addition, for the bearing is no separation type clearance; Finally, bearing installed after the work clearance, than before the installation of the original clearance small, because bearing to withstand the load rotation, and bearing cooperate and load the effects of elastic deformation.




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