To extend the service life of the bearings SKF, installation is will not be ignored in the steps, how to provide installation precision will directly affect the service life of SKF bearing, so, be in before installation bearing, the first to determine the installation precision bearings, and then not find the method and improve.

(1) measurement axis and the size of the hole SKF housings, to determine with precision bearing SKF, cooperate requirement as follows: inner circle take over surplus with shaft, a surplus quantity of 0 ~ + 4 μ m (in light load, high precision for 0); The bearing outer ring and SKF hole take clearance fit, clearance is 0 ~ + 6 μ m (but in the bearings use free Angle contact ball bearing, still can increase clearance); Axis and a hole surface roundness error in 2 μ m the following, SKF bearing the face of circle used parallel degree in 2 μ m the following, shaft shoulder end in foreign end of the 2 μ m jump below; SKF housing block on the shoulder axis holes in 4 μ m the beat; The front cover the face in the main shaft axis beat μ m in 4 below.

(2) the fixed end SKF bearing on the shaft before the installation: to bearing with clean cleaning thoroughly clean kerosene, for grease lubrication, the first contains 3% ~ 5% of the organic solvent grease injection bearing be skimmed cleaning after another, oil gun will quantitative fill in bearing grease SKF (of the bearing capacity of the space SKF 10% ~ 15%); SKF bearing heating warms up to 20 ~ 30 ℃, with hydraulic press will load bearing axial end; Will close on the shaft will set of pressure and to the right pressure withstand SKF bearing the face axial fixation; Will DanHuangCheng band of roll bearing outer ring in, with the method of measuring start torque calibration regulations or whether there is a big change of load (even if SKF bearing is correct, but due to cooperate or maintains a deformation, the load also has change may).

(3) will import bearing axial load combination SKF-a hole: heating a hole that warming 20 ~ 30 ℃, with the continuous light slow pressure will SKF bearing axial load a hole-combination; Adjust the front cover, make the front cover is tightening 0.02 ~ 0.05 u m, with the benchmark for bearing SKF end, will be in conflict with the axis of the dial indicators header neck on the surface, the axis rotation measuring the beating and requirements in 10 μ m the following error; Dial indicators will be located in the shaft, headers to conflict with the back seat hole surface axis rotation to measure a hole before and after the bearing SKF coaxial degrees.

(4) will the free SKF selectively on bearing may be offset by the position of the deviation, installation to after the bearing support position, as far as possible to offset the roundness error and between the coaxial tolerance of deviation.

SKF bearing in the installation is completed in the host, such as the measurement of the radial beat SKF bearing spindle, can find its every turn measurements are certain change; Continuous measurement can be found after a certain number of turn after, this change will approximate the repetition. Measure the degree of this change for cycle rotation precision index, change the approximately the repetition of the number needed to represent the accuracy of the spin cycle "quasi-periodic", among a cycle of amplitude value change, namely for cycle rotation precision is poor.

As to the bearing spindle performs suitable SKF the load, speed will gradually rose to close to working speed to implement SKF bearing "integration" effect, can improve the circulation of the spindle rotation precision.

SKF 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.

Large mechanical can't manual rotation, so start immediately cut off after no-load power, mechanical idling, examined for vibration and noise, rotating parts if there is contact, and so on, make sure no abnormalities, into 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, SKF bearing the change of the temperature of leakage or discoloration, lubricant, and so on. If find unusual, shall be immediately suspend operation, and check the mechanic and, when necessary, to dismantle the bearing inspection.

SKF 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.
 
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 too much, bearing clearance is too small, installation bad, sealing device too friction. High speed rotating occasions, SKF bearing structure, the choice of the ways of lubrication error, etc is the reason.

SKF 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 bad, or SKF precision bearing damage, foreign bodies, invasion, etc.




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