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/*728*90 created on 2018/5/16*/ var cpro_id = "u3440131"; Home>Bearing knowledge>The reason for the damage of NSK bearing four major damages The reason for the four major damages of NSK bearings
Although the quality of NSK bearing is good, it will be bad in the application; the following are some common reasons for the damage of the four bearings in the application; if we can strictly follow the following requirements; the bearing can actually be used very Long time. /*250*250 was created on 2017/12/25*/ var cpro_id = 'u3171089';
First, fatigue (about 34%) fatigue damage is a common damage method for NSK bearings. The common cause of fatigue damage may be: NSK bearing overload operation for a long time, not repaired in time, repair is not appropriate, equipment aging, etc. Pick the right bearing type; replace the tired NSK bearing as scheduled.
Second, poor smoothness (about 36%) According to the survey; poor smoothness is one of the main reasons for the premature failure of the bearing. The main reason is: not added smoothing agent or smooth oil in time, smoothing agent or smooth oil is not filled in place , smoothing agent or smooth oil selection is not appropriate, smooth method is not accurate, etc.. We advocate the selection of precise smoothing agent or smooth oil; use precise smooth filling method.
Third, the equipment is not appropriate (about 16%) The equipment uses brute force; directly hitting the bearing with a hammer damages the bearing, which is the main reason for the deformation. The equipment is not in place; the equipment has errors or is not loaded into the NSK bearing position; The bearing clearance is too small. The inner and outer rings are not in the same center of rotation; they constitute different hearts. We advocate that we choose the appropriate or professional bearing equipment; the equipment should be tested with special instruments.
Fourth, pollution (about 14%) Pollution will also lead to premature bearing damage; pollution refers to sand, metal scraps, etc. into the NSK bearing. The main reasons include: prematurely open NSK bearing packaging before use; constitute pollution, The working environment is unsanitary during the equipment; the pollution is caused, the working environment of the bearing is unsanitary; the working medium is polluted, etc. It is recommended that we do not disassemble the bearing packaging before use, and insist on the sanitation of the equipment environment; Clear and enhance the sealing equipment of NSK bearings.
1. Soaking method: Some small NSK bearings are selected to be immersed in anti-rust grease; the thickness of the oil film can be reached by controlling the temperature or viscosity of the anti-rust grease. The appearance of the surface is adhered to a layer of anti-rust grease.
2, brushing method: brushing when paying attention to uniform coating on the NSK bearing appearance; do not pile up; also pay attention to avoid leakage coating.
3. Spray method: Some large-scale anti-rust materials are not suitable for oiling by immersion method; usually, the compressed air with a pressure of about 0.77MPa is sprayed in the air. The spray method is suitable for solvent-diluted rust-proof oil or thin layer rust-proof. Oil. It is necessary to choose a comprehensive fire prevention and labor insurance method.
NSK bearing surface rust pre-disposal method: 1, appearance hygiene: the need to contact the NSK bearing appearance and the conditions at the time. Commonly used methods are solvent removal method, mechanical hygiene method and chemical treatment health method. After the surface is dry and clean, it can be dried by filtered dry compressed air. It may be dried with a drier at a temperature of 120~170 °C; finally, it is dried with a clean gauze.
The normal use of NSK bearing smooth oil is brown and blue black. If it is milky yellow, it indicates that the engine oil is mixed with diesel or water; it should be replaced in time. If it is dark black, it indicates that the oil has been transformed; it is necessary to promptly replace.
Mix the oil to be inspected and then drip on the white paper (the best is the filter paper); constitute the oil spot; the oil spots gradually disperse from the center outward for about 2 to 3 hours; form three concentric rings. According to these three The color, width and shape of the area can distinguish the condition of the oil.
Remove a small amount of oil from the low shell of the oil; apply it on your fingers; use your fingers and thumb to honing. If you feel the oil has impurities or the same non-sticky feeling like water; even the hair is sour or sour; the oil is now changing. If it is æ»After grinding, you can see the slight shiny metal grinding on the finger; it clarifies that the engine has more serious wear parts; together, it also clarifies that the oil needs to be replaced immediately.
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Source: China Bearing Network Time: 2017-12-01