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The so-called double row cylindrical roller bearings appear burn injury status means: wheel bearing raceways, rolling elements and cage sharp fever in the rotation until discoloration, softening, deposition and breakage. Resulting in double row cylindrical roller bearings burn NSK Bearings mainly due to poor lubrication, may not be using regular lubricant or lubricant too much, too little, is not correct.
Secondly may be too large loads (preload is too large). Speed is too large. Clearance is too small. Water or other foreign matter intrusion. If the above two conditions are not so that shaft, bearing housing poor precision, shaft deflection. See here, I think everyone wants to know the solution right, first of all, to study the lubricant and lubrication method, the election of bearing lubricant, and their amounts, and to correct NSK Bearings choice. Research to tie, bearing clearance and preload, and improved sealing device. Check the shaft and housing accuracy.
Recommend double row cylindrical roller bearings, pay attention to the installation, lubrication, clearance and other aspects are done as accurate as possible, in place.
General sense of the double row cylindrical roller bearing fatigue life is a certain technical condition (structure, process state, with the installation, clearance and lubrication status, etc.) of the rolling bearing, the actual use of the host state, running until the rolling surface occurs fatigue and can not meet the requirements of the host bearing inner and outer rings (shafts, seat ring) relative to the total number of rotations - total number of revolutions. When NSK Bearings turn more broadly constant or is known, the fatigue life can be used with the total number of revolutions corresponding to the total number of hours of operation that should also pay attention to:
A double row cylindrical roller bearings lubricated if get good and correct debris and moisture barrier, which means that there should be no oil seal wear, however, the best in the open bearing box, check the bearing and regularly check seals. Checking close bearing oil seal at the situation in order to ensure that they are adequate to prevent hot liquids or corrosive liquids or gases penetrate along the axis of the bearing, oil seal If wear should be replaced soon.
(2) high temperature frequently expressed double row cylindrical roller bearings in unusual circumstances. Temperature is harmful in the bearing lubricant. Sometimes bearing overheating can be attributed to the bearing lubricant. If the bearing temperature exceeds 125 degrees Celsius long-term operation, it will reduce NSK bearing life.
Caused by high double row cylindrical roller bearings reasons include: lack of lubrication or excessive lubrication, the lubricant containing magazine, the load is too large, bearing damage, lack of space, and seal the heat generated by friction and so on.
3 Check the operation of the machine's condition is monitored in order to avoid equipment downtime.
| Product Model | Inside Diameter | Outside Diameter | Thickness |
| 7220C NSK | 100 | 180 | 34 |
| 7220B NSK | 100 | 180 | 34 |