A, how to choose a grease?

INA 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.

Second, bearing before installation must be cleaned?

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 is rolling 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, how to install and remove?

When installation, not directly hammer the INA bearing surface and the stress face, should be with press block, sleeve or other installation tools (tooling) 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 rolling bearing inner circle inflation, making it easier to fall off.

Fourth, to install the surface and installation site requirements?
B: yes. If there were INA bearing the iron filings, 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.

Five, in lubricating bearings, oil coating the more the better?
Lubrication INA bearing, oil coating the more the better, this is a common mistake concept. Bearing and bearing indoor much oil will cause excessive oil mix, which generate a high temperature. The rolling bearing filling the number of lubricant to fill the internal space of the bearing 1/2-1/3 advisable, high speed should be reduced to a third.
Six, bearing radial clearance smaller may be more beautiful?
Not all the INA bearing require 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 work under special conditions of rolling bearing, appropriate chooses big radial clearance; For precise spindle, machine tool bearing in smaller and appropriate chooses the 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 INA bearing cooperate and load the effects of elastic deformation.

Bearing installation ends, in order to check for installation is correct, want to undertake operation inspection. Small machine can rotate by hand to confirm whether it rotate smoothly. Check for foreign projects, scars and creasing and cause operation not free, because of installation is bad, the installation seat processing bad and produce torque is not stable, because clearance is too small, installation error, seal and cause excessive torque friction, and so on. If there is no exception may start power operation.

Dynamic operation, and low no-load from beginning, slowly, to improve conditions for the rating of the operation. The test run in to check the matters, whether to have abnormal sound, INA bearing the change of the temperature of the lubricants, leakage or color change etc. If find unusual, shall be immediately suspend operation, and check the mechanic and, when necessary, to dismantle the bearing inspection.

Bearing temperature, general but according to the external temperature speculate that the bearing. But use of oil bearing outer ring directly measuring the hole of the temperature more accurate. The rolling bearing temperature, from the operation began gradually raised, usually 1 ~ 2 hours temperature stability. If bearing installation is bad, the temperature will rise sharply, the abnormal high temperature. The reason such as lubricants INA bearing clearance too much, too little, installation bad, sealing device too friction.

INA bearing rotation sound check stethoscope, etc, have strong metal noise, different sound, irregular sound abnormal for details. The reasons are as bad lubrication, shaft bearing or bad, precision bearing damage, foreign bodies, invasion, etc.




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