FAG bearing anti-rust material management

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The clearance between FAG imported bearings and shaft must be appropriate to make the life of FAG imported bearings longer. The following methods can be used to detect the radial clearance of FAG imported bearings:

1. Ruler detection method
For imported FAG bearings with larger diameters, the clearance is larger, and it is planned to use a narrower feeler gauge for direct detection. For FAG imported bearings with smaller diameters, the clearance is small, which is convenient for measuring with feeler gauges, but the backlash of FAG imported bearings must be measured with feeler gauges of appropriate thickness.

2. Lead pressure detection method
It is more accurate to detect the clearance of FAG imported bearings with lead pressing method than with feeler gauge, but it is more troublesome. The aluminum wire used for testing should be soft and moderate in diameter. It should not be too large or too small. The ideal diameter is 1.5 to 2 times the gap. In actual work, soft lead wire is usually used for testing.

When testing, first open the FAG imported bearing cover, select the appropriate diameter lead wire, cut it into 15~40mm long pieces, put it on the journal and the upper and lower FAG imported bearing interface, and cover the FAG imported bearing cover. Tighten the fixing bolts according to the specified torque, then loosen the bolts, remove the FAG imported bearing cap, use a micrometer to detect the thickness of the flattened lead wire, and find the average value of the top clearance of the FAG imported bearing. If the top clearance is too small, pads can be added on the joint surface of the upper and lower tiles. If it is too large, reduce the pad, scrape or re-pouring the tiles.

Adjustment of bearing bush tightening force: In order to prevent the possible rotation and axial movement of the bearing bush in the working process, in addition to matching the interference and stop parts, the bearing bush must also be pressed tightly with FAG imported bearing caps, measurement methods and head clearance The method is the same, except for measuring the thickness of the soft lead wire, the bearing bush tightness can be calculated.

Generally, the bearing pressure is 0.02~0.04 mm. If the pressing force does not meet the standard, it can be adjusted by increasing or decreasing the thickness of the gasket at the joint surface of the FAG imported bearing and the bearing seat.