Use gasoline or kerosene first clean, dry cloth to wipe clean, and then apply a small amount of oil and ease of installation. All should be paid attention to these parts after cleaning, sand casting will be completely clear; Who cooperate with bearing grinding Angle, must take out, in order to prevent sand slag and metal scraps into bearing internal installation, affect the assembly quality.


1, the location and installation requirements


Installation position should with lathe, grinding machine and other mechanical equipment are a distance apart. Often areas should be clean, dry cleaning, watch the scrap iron, sand, dust, moisture into the bearing.


2, check the bearing model, ready to install the tool


Test bearing type, size is according to the installation requirements, and according to the structure characteristics of bearing and cooperate with the various components, selecting the best assembly method, ready to install the use of tools and measuring tools. Common installation tools have a hammer, tongbang, outlet, special plate, screw the mosquito fixture, press, etc., the measurement of vernier caliper, micrometer, dial gauge, etc.


3, testing the bearing surface of assembly


Bearing assembly plane and cooperate with the surface of the part, if there is any collision, rust layer, abrasive dust, sand, dust and dirt, bearing installation difficulties, cause assembly position is not right, Second, these attachments form abrasive, easy to scratch bearing working surface, affect the assembly quality. Before installing, therefore, should be holes on the surface of the shaft neck, bush, shoulder end face and connecting parts, such as casing, gasket, on the surface, carefully check. If there is any rust layer, usable fine file file, good cloth, at the same time also want to clear the attachment on the surface of bearing assembly and connection parts.




NSK bearing motor rusty reason is complex, may be bearing anti-rust treatment is bad, still can cause water corrosion, corrosion caused by fog.


Most electrical insulating varnish used evaporate acid composition mainly has four kinds: (1), there is no reaction, low molecular paint raw materials acid (without water adjacent and terephthalic acid, maleic acid water, trans butylene acid). (2) the paint curing generated when acid (modified phenolic resin paint, formaldehyde aqueous formic acid). (3) to generate heat or low-level fatty acid oxidation decomposition (formic acid, acetic acid). (4) coating curing water decomposition generated after acid. Insulating paint production of formic acid is the main component, the number of formic acid and the degree of corrosion has a close relationship. Oil adsorption evaporation acid composition of the paint cause metamorphism, oil and acid ingredients, promote fat hydrolysis, acid concentration increased as a result, NSK bearings caused by corrosion Series Of SKF Bearings http://www.timkenbearings-hk.com/ .


Grease the working principle of the steel ball is the use of oil layer and the inner and outer race, using viscosity properties of oils and fats, on the surface of the steel ball, ditch, kick-off of the internal and external metal interface ditch, reduce wear and tear on the surface of the metal to protect metals from corrosion of air and water, reduce vibration and noise, make the rotation of the bearing can be smoothly. But after grease metamorphism, viscosity will change, oil film, the separation of function and adhesion performance of the grease will disappear, such consequences, one is by insulating varnish acid composition, direct oxidation of metal surface cause bearing corrosion. The second is to make the direct contact of ball in contact with the inner and outer raceway, wear occurred in the rotation will increase noise.