FAG bearings and axial clearance of the necessary fit, to make the longer service life of the bearings, FAG bearings radial clearance testing may use the following methods:
　　1, racing-foot detection method
　　FAG bearings for large diameter, large gap, proposed a more narrow feeler direct detection. For smaller diameter of FAG bearings, a small gap to facilitate measuring feeler, but clearance of the bearing must use appropriate feeler thickness measurement.
　　2, lead testing law
　　Lead detection of FAG bearing clearances more accurately than test using feeler, but is too much trouble. Detection of aluminum wire used should be soft, moderate in diameter, should not be too big or too small, the ideal diameter is 1.5~2 times the clearance of, soft lead wire is commonly used for testing in practical work.
　　Detection of when, first open bearing cover, selection appropriate diameter of wire, will its stopped into 15~40 mm long of small paragraph, placed in axis neck Shang and the upper and lower bearing points interface Department, cover Shang bearing cover, by provides torque screwed tight fixed bolt, then again screwed pine bolt, remove bearing cover, with micrometers detection pressure flat of wire thickness, seeking out FAG bearing top gap of average.
　　If the gap is too small, you can pad on the upper and lower joints. If it is too large, reduce pad again, scraping the Institute or cast tile.
　　Bearing force adjustment: in order to prevent Bush from work that may occur during rotation and axial movement, in addition to cope with interference and moving parts, FAG bearings for bearing also needs cover tightly, measurement method and measured as top clearance method, soft wire thickness, measured, calculated bearing force.
　　General bearing clamping force 0.02~0.04 mm. If the clamping force is not up to standard, you can increase or decrease and FAG FAG bearings housings jiehe Mian method to adjust the thickness of the gaskets, w pad is not allowed back.
　　In addition to guarantee other than the radial clearance of sliding bearing, should also ensure that the axial clearance. Axial clearance is detected, the axis moves to an extreme position, and then using a feeler gauge or dial gauge measurement axis from one extreme to the other extreme position play that axial clearance. When the bearing clearance does not meet the requirements, should be adjusted. FAG bearings often use outside gasket adjust the radial clearance.