Bearing replacement, car four-wheel bearing need maintenance

Approximate whistling sound, mixed with the rolling noise of rolling element bearing lack of grease or improper selection of lubricating oil to fill clean lubricating oil or change the suitable lubricating oil. Manipulator, of course, just a robot, manipulator and contains a CNC lathe manipulators, machine tools, injection molding machine manipulator, welding robot manipulator and so on, in this paper, the machine tool robot. Big rigidity, high hardness, even at low temperature, high impact strength; , the outlook in recent years, engineering plastic products with its superior performance won more and more widely used. & emsp; & emsp; The selection of high-speed precision spindle bearing & amp; emsp; & emsp; High speed precision spindle bearing is greater than the dN value. 油脂, / EP - L vortex compressor bearing high temperature and high speed by fully synthetic mixed grease base oil, used special polymer as the viscosifier, and add the patent of polymer materials, as well as corrosion inhibitor and abrasion resistance, and other additives, refined but become, the product can be formed on the surface of the lubricating a condensate, the reversible nanometer lubricating layer can protect lubrication a benign operation for a long period of time. /, — About P rotation accuracy is higher than P dimensional accuracy, forging folding magnetic marks and surface into a fixed Angle of linear, trench and scales flake, as shown. When the motor noise problems are bad, the center of the large axial head Kong Ding to protect good, does not produce line, which directly affect the machining accuracy. Making the hole part fracture observation, sample after mouth visible fracture surface roughness, shiny grain surface edges, in addition to this, also distributed holes, commonly known as 'tofu' fracture, the fracture morphology as shown in figure a. Figure forging folding defect section metallographic topography forging burnt forging heating temperature is exorbitant, heat preservation time is too long cause overheating, serious when grain boundary oxidation even melting. Under normal circumstances, the spindle should be rolling bearing, particularly for the vertical spindle, only when the main shaft in horizontal, and processing the workpiece surface roughness value is small, sliding bearing is used. See appearance: grease regardless of what kind of pigments present appearance, fat body should have dense paste body, if you open the packing, see surface oil, grease, surface colour depth or skin sclerosis or consistency decreased significantly, or mixed with water and emulsion white fat surface, or grease on the surface of seal cause qualitative change, the fat are unavailable. Investigate its reason, is a bearing fault is due to installation or do not pay attention to when using the bearing lubrication, resulting from an external have, or is caused by bearing shell heat affected poor lubrication, and premature failure.