Bearings and shaft with gap must be appropriate to make more long-term bearing life, bearing radial clearance can be detected using the following method:
A race feet detection method
For larger diameter bearings, larger gap, intended to be used to directly detect narrow feeler. For the smaller diameter of the bearing, the gap is smaller, convenient with a feeler bearing backlash, it is necessary to the proper thickness feeler.
Second, the pressure lead detection method
Pressure of lead detected bearing clearance with a feeler detection more accurate, but it is too much trouble. The detecting Lvsi should be soft moderate diameter, not too big or too small, the ideal diameter of the gap is 1.5 to 2 times, usually with a soft lead wire detecting the actual work.
Detection time, first open the bearing cap, the choice of the appropriate diameter of the lead wire, cut into 15 to 40 mm long pieces, placed in the journal on the upper and lower bearings at the interface, cover with bearing cap torque required to tighten the fixing bolts then loosen the bolts, remove the bearing cap, with a micrometer detection flattened lead wire thickness, calculated the average gap bearing top.
If the tip clearance is too small, the binding surface in the upper and lower watt padded. If too much, less pad, scraping, or re-pouring of watts.
Pad clamping force adjustment: In order to prevent the rotation and axial movement of bearing pads may occur in the work process, in addition to fit interference and the stopper part, the pad is also necessary to use the bearing cap to compress the measuring method and the measuring headspace method the measured soft lead wire thickness available computing out of the bush clamping force.
General bearing the pressing force of 0.02 to 0.04 mm. Pressing force does not meet the standard, can be used to adjust the increase or decrease in the bearing and the bearing joints at the gasket thickness, tile back allowed padded.
Bearings addition to ensure that the radial clearance, should also ensure that the axial clearance. Detection axial clearance, the axis is moved to an extreme position, and then with a feeler or dial indicator measuring shaft from one extreme position to the other extreme position runout ie axial gap. When the sliding bearing clearance is not required, should be adjusted. Split bearings are often used shims to adjust the radial clearance.


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