1, static pressure bearing
(1) when napping spindle and bearing severe and mild wear, caused when a stream of bearing clearance is too large and does not meet the requirements, the spindle and bearings are required for repair, it should be noted, static pressure bearing oil seal surface is not scraping the ground.
(2) when the excessive wear of the bearing, bearing oil seal oil, cannot afford to establish a normal oil cavity pressure, shaft and bearing break, or take other repair methods to recover the original precision.
2, hydrostatic bearing repair
(1) the hydrostatic bearing requires very good sealing, neither leaks, air intake or impurities. Repair, begin by thoroughly cleaning and oil change, keeping parts clean.
(2) spindle can generally by precision grinding or abrasive to m.
(3) the bore and outside diameters of the bearings should be carefully measured, outside diameter in addition have the necessary clearance, 0.02~0.03mm grinding repair allowance should be retained, and grinding to repair bearings, bearing shell with the bearing outer diameter is less than 100mm, the interference take 0.003~0.007mm, bearing diameter is greater than 100mm, the interference or clearance of about 0.003mm. Bearing when mounting cabinet, preferably with cold pack.
(4) the throttle and the oil supply should meet the functional requirements of the system, in addition to repairs, adjustments to precision requirements, should also be cleaned to change the oil.
(5) the hydrostatic bearing inside diameter grinding Rod developed to meet requirements, grinding rod and bearing clearance holes should be between 0.02~0.025mm, geometric errors of 0.003mm, surface roughness in the m. Spall with 300# silicon carbide, an expert with 600# when 800# or silicon carbide SIC, at last use engine oil light research. And hydrostatic spindle bearing diameter clearance shall meet the design requirements.
(6) after grinding repair, to clean all of kinds of parts.



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