When lubricating bearings, oil coated the better it?
INA bearing lubrication, oil coated the better, this is a common misconception. Bearings and bearing interior excess grease will cause excessive oil stirring, resulting in extremely high temperatures. Filling quantity of lubricant to the rolling bearing inside the bearing space filled with 1/2 to 1/3 is appropriate, when the high-speed reduced to 1/3.
Bearing radial clearance smaller better?
Not all of SKF bearings require minimal clearance work, you must choose the appropriate clearance according to the conditions. GB 4604-93, the bearing radial clearance group is divided into five groups -2, 0 group 3, 4, 5 groups, progressively larger clearance values, where 0 is set as the standard clearance. Basic radial clearance group for general operating conditions, temperature, and commonly used conventional interference fit; Rolling in special conditions of high temperature, high speed, low noise, low friction and other work are advised to use large radial clearance; to precision spindle, machine tool spindle bearings should use a smaller radial clearance; roller bearings for holding a small amount of clearance work. In addition, separate type of bearing is indifferent clearance; and finally, after bearing installed operating clearance, clearance than the small primitive pre-installation, since the bearing to withstand a certain load rotation, as well as with SKF bearings and the load generated The amount of elastic deformation.
After bearing installation, in order to check for proper installation, operation to be checked. Small machines can be manually rotated to confirm rotate smoothly. Check project dysfunctional because nick, indentation caused due to poor installation, poor mount processing and the torque generated unstable moment due clearance is too small, installation error, seal friction caused by too large Wait. Without exception, you can start power operation.
    Power operation, starting from no-load low speed, slowly increased to a predetermined nominal operating conditions. Commissioning check the matter is, whether there is abnormal sound, SKF bearing temperature, lubricant leakage or discoloration and so on. If abnormal, should immediately suspend the operation, inspection machinery, if necessary, to remove the bearing inspection.
    Bearing temperature, and it can be presumed according to the external temperature of the bearing seat. But the use of direct measurement of the bearing outer ring hole temperature is more accurate. Rolling temperature gradually increased from the start of the operation, the temperature is usually 1 to 2 hours after stabilization. If the bearing mounting bad, the temperature will soar, abnormal high temperature. The reasons such as too much lubricant, SKF bearing clearance is too small, poor installation, seal friction and too big.
   SKF bearings rotating sound with a stethoscope and other tests, there is a strong metal noise, different sound, irregular sound, etc. Description Exceptions. The reasons are poor lubrication, shaft or bearing bad precision, bearing damage, foreign invasion and so on.

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