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The size and quality of the sound on the TIMKEN bearings in operation of rolling bearing are examined, even a slight peeling, injury, will make the abnormal sound and irregular sound, with sound device can distinguish.
Listen for
Use hearing to identify irregular running is a very common method. For example: with the help of electronic stethoscope to a particular part to detect abnormal noise often have the experience method used by the operator.
TIMKEN bearings are in good running state will issue a muffled whining sound. If a sharp hissing sound, squeaky voice and other irregular sound, often said bearings is bad running status.
A sharp creak noise may be due to inadequate lubrication caused. Inappropriate TIMKEN bearing clearance can also cause metallic sound. Dent concave rail TIMKEN bearing outer ring orbit will cause vibration, resulting in smooth crisp sound. If due to the installation of the percussion scars can also generate noise, the noise will vary with the level of TIMKEN bearing speed.
If intermittent noise, said rolling element may be damaged. This sound is when the damage occurred in the surface is rolled out, TIMKEN bearing if contaminants often causes hissing sound. The same bearing serious damage will produce irregular and loud noise.
TIMKEN bearing damage can of course by listening to perceptible, but usually at this time already arrived bearing must be replaced as soon not. So, better methods such as the use of such as electronic monitoring instrument. Compared with the old method using a stick to estimate the TIMKEN bearing condition more accurate.
| Product Model | Inside Diameter | Outside Diameter | Thickness |
| 32240U NTN | 200 | 360 | 98 |
| 30240U NTN | 200 | 360 | 58 |