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In General, if it is correct using the TIMKEN bearing, you can use up to reach fatigue life. But there will be an unexpected injury prematurely, not in use. This early injury, as opposed to a fatigue life, referred to as the quality limits of failures or accidents. Result from installation, use, lubricate on the attention from outside intrusion by foreign bodies, shafts, case study on thermal effect of inadequate.
TIMKEN bearing failures, such as: TIMKEN bearing rings of rib injuries, as a reason to consider, for oil lubricant inadequate, inappropriate, structural defects, foreign body invasion, bearing misalignment, shaft deflection is too large, there will be these reasons coincide. Therefore, only investigated injuries, it is difficult to know the real cause of injury. However, if you know around the bearing of used machinery, used condition, bearing construction, understanding of the situation before and after the accident, combined with several causes bearing damage and visit, you can prevent the recurrence of similar accidents.
1, axle bearing of oscillation
TIMKEN bearing oscillation TIMKEN bearing damage is very sensitive, such as spalling, indentation cracks, wear, corrosion, and so reflected in the oscillating bearing surveying, so, after bearing oscillation by using the special investigation it deems appropriate (frequency analysis) investigation of oscillation of volume, after frequency can not infer exceptions of specific things. Measured number of bearing application conditions or sensor installation location is different, because this requirement prior to each analysis of the survey the purpose of the machine it is found that the benchmarks.
2, bearing temperature
Temperature of TIMKEN bearings, plain bearings outside of room temperature can measure up, if the oil hole can direct investigation bearing temperature is more appropriate.
In General, TIMKEN bearing temperature as the TIMKEN bearing operation started to slowly rise up 1-2 after hours to reach stable status. Normal temperature of the bearing as a result of thermal capacity of the machine, calories, speed and load are not the same. If the lubricating oil, installation of appropriate, bearing temperature will rapidly rise up, revealed abnormal high temperature, then be sure to stop functioning, indispensable approach to preparedness.
Using thermal sensors can be monitored at any time testing Office temperature of TIMKEN bearings, and successfully implemented the semi-automatic alarm when temperature exceeds the specified value or inactivity to avoid burning shaft accident.
High-temperature often used expression is in a dirty state. High temperatures may also prejudice the TIMKEN bearing lubricant agent. Sometimes overheated bearing lubricants that can be attributed to the housing agent. If TIMKEN bearings in more than 125 ° c temperatures during the long years of continuous transfers reduce the bearing life. Duanyou enables high temperature bearings covers: lubricants are not adequate or not for the sake of oil, lubricating agent. Including impurities, excessive load, bearing loss rings, space is not sufficient, onset bearing and oil seal with high friction and so on.
Because this year TIMKEN bearing temperature monitor detection is essential, whether measurements or other secure parts of the bearing itself. Under the operating conditions are not the same thing, no matter what the failure of the temperature change can be expressed.
TIMKEN bearing periodic measurement of temperature using a thermometer, press the h-number of thermometers, can be very accurate measurement of bearing temperature in degrees centigrade or Fahrenheit temperature unit emerged. TIMKEN bearings rolled to the effect that, when its destruction will lead to facility outages, because these bearings should preferably be fitted with temperature probe into observation. Under normal conditions, bearings lubricating oil or lubricating oil after natural 1-2 day of temperature rise on a continuous basis.
| Product Model | Inside Diameter | Outside Diameter | Thickness |
| 7210BDF NSK | 50 | 90 | 20 |
| 7210ADF NSK | 50 | 90 | 20 |