The bearing of engine wear parts of the more serious
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A tired, (about 34%) fatigue damage is damage of NSK bearings common. Fatigue failure of the common reason may be: NSK bearing long-term overload operation; not timely repair; repair improper; aging equipment etc.. Suggest that you select the appropriate bearing type, to the timely replacement of exhausted NSK bearing.
Two, poor lubrication (about 36%) according to the survey, poor lubrication is one of the main causes of premature bearing damage. The main reasons include: failure to fill lubricant or lubricating oil; lubricant or lubricating oil is not filling in place; selection of lubricants or lubricant improper lubrication is not accurate and so on. I recommend you to choose accurate lubricant or lubricating oil, lubricating filling mode accurately.
Three, improper installation (about 16%) the installation to use brute force, direct percussion bearing the greatest damage to the bearing with a hammer; is the main cause of deformation. The installation is not in place, install a biased or not loaded to NSK bearing, resulting in bearing clearance is too small. The inner and outer rings is not uniform rotation center, resulting in different heart. Suggest that you select the appropriate or professional bearing installation tool, installed special equipment to use test.
Four, pollution (about 14%) pollution can lead to premature bearing damage, pollution is refers to dust, metal scraps into the NSK bearing. The main reasons include: prematurely before using open NSK bearing package, causing pollution; installation work environment is not clean, pollution; bearing working environment is not clean, the working medium pollution. Suggest that you better not disassemble the bearing before packing; install to keep the environment clean installation, clean bearings to be used; enhanced NSK bearing sealing device.
1, soaking method: small NSK bearing by soaking in anti rust oil, oil film thickness can be achieved by controlling the antirust grease temperature or viscosity. Method for making one layer of antirust oil on its surface adhesion.
2, brush: brush when the attention of evenly on the NSK bearing surface, do not produce accumulation, also want to notice to prevent leakage of coating.
3, spray method: not suitable for some large anti rust material by immersion oil, about 0.7Mpa pressure filter with compressed air spray in air cleaning. Application of solvent spray dilution type rust preventive oil or thin film antirust oil. This method must be adopted to improve fire safety and labor protection measures.
Pre processing method of NSK bearing surface rust: 1, surface cleaning: cleaning must be combined with the NSK bearing surface and the nature of the condition. The commonly used methods are solvent cleaning method, mechanical cleaning and chemical cleaning method. 2, the surface is dry after cleaning can be used for drying compressed air drying filter. Or use the dryer to 120~170 ℃ temperature drying, and finally with a clean gauze wipe.
Lubricating oil NSK bearings use normal color is brown and black. If the milk yellow, the oil mixed with oil or water, should be promptly replaced. If the dark black, the oil has been deterioration, must be promptly replaced.
To be checked after oil stir drops on white paper (preferably filter paper), the formation of oil stains, oil stains from the center outward after about 2 ~ 3 hours gradually spread, the formation of three concentric rings. According to the three region of the color, width and morphology to distinguish oil state.
Remove a little oil from the oil low housing, on the fingers, fingers and thumbs twisting mill. If you feel the oil impurities or like water without sticky feeling, even bitter or sour, oil has been deterioration. If the metal grinding twist after grinding on the finger to see small shiny.
234407BM 234706BM 234406BM 517/2860V/YA 5610/2500 517/1720X1V 527/1181M 510/1180M 517/930 510/670 590/560 510/500 52780 59080 517/368M 51760U 517/238 6207-2ZN 6206-2ZN 6205-2ZN 6204-2ZN 6203-RZ 6203-2ZN 6202N 6202-2ZN 6201-2ZN 6200ZZ 6200-2ZN 62/32-ZN 62/32-Z 62/32N 62/32-2Z 62/32-2RZ 62/32-2RS 62/28-2RZ 62/22-2RZ 61996 61992 61988 61984
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NSK bearing has good quality, but in use is always bad, here are four common causes of damage of bearing in use and some suggestions, if we can strictly in accordance with the following requirements do, bearing can be used for a long time.A tired, (about 34%) fatigue damage is damage of NSK bearings common. Fatigue failure of the common reason may be: NSK bearing long-term overload operation; not timely repair; repair improper; aging equipment etc.. Suggest that you select the appropriate bearing type, to the timely replacement of exhausted NSK bearing.
Two, poor lubrication (about 36%) according to the survey, poor lubrication is one of the main causes of premature bearing damage. The main reasons include: failure to fill lubricant or lubricating oil; lubricant or lubricating oil is not filling in place; selection of lubricants or lubricant improper lubrication is not accurate and so on. I recommend you to choose accurate lubricant or lubricating oil, lubricating filling mode accurately.
Three, improper installation (about 16%) the installation to use brute force, direct percussion bearing the greatest damage to the bearing with a hammer; is the main cause of deformation. The installation is not in place, install a biased or not loaded to NSK bearing, resulting in bearing clearance is too small. The inner and outer rings is not uniform rotation center, resulting in different heart. Suggest that you select the appropriate or professional bearing installation tool, installed special equipment to use test.
Four, pollution (about 14%) pollution can lead to premature bearing damage, pollution is refers to dust, metal scraps into the NSK bearing. The main reasons include: prematurely before using open NSK bearing package, causing pollution; installation work environment is not clean, pollution; bearing working environment is not clean, the working medium pollution. Suggest that you better not disassemble the bearing before packing; install to keep the environment clean installation, clean bearings to be used; enhanced NSK bearing sealing device.
1, soaking method: small NSK bearing by soaking in anti rust oil, oil film thickness can be achieved by controlling the antirust grease temperature or viscosity. Method for making one layer of antirust oil on its surface adhesion.
2, brush: brush when the attention of evenly on the NSK bearing surface, do not produce accumulation, also want to notice to prevent leakage of coating.
3, spray method: not suitable for some large anti rust material by immersion oil, about 0.7Mpa pressure filter with compressed air spray in air cleaning. Application of solvent spray dilution type rust preventive oil or thin film antirust oil. This method must be adopted to improve fire safety and labor protection measures.
Pre processing method of NSK bearing surface rust: 1, surface cleaning: cleaning must be combined with the NSK bearing surface and the nature of the condition. The commonly used methods are solvent cleaning method, mechanical cleaning and chemical cleaning method. 2, the surface is dry after cleaning can be used for drying compressed air drying filter. Or use the dryer to 120~170 ℃ temperature drying, and finally with a clean gauze wipe.
Lubricating oil NSK bearings use normal color is brown and black. If the milk yellow, the oil mixed with oil or water, should be promptly replaced. If the dark black, the oil has been deterioration, must be promptly replaced.
To be checked after oil stir drops on white paper (preferably filter paper), the formation of oil stains, oil stains from the center outward after about 2 ~ 3 hours gradually spread, the formation of three concentric rings. According to the three region of the color, width and morphology to distinguish oil state.
Remove a little oil from the oil low housing, on the fingers, fingers and thumbs twisting mill. If you feel the oil impurities or like water without sticky feeling, even bitter or sour, oil has been deterioration. If the metal grinding twist after grinding on the finger to see small shiny.
