Due to NSK products imported bearing the use for a long time, so the damage frequency is relatively high, so for a short time, to be replaced, in order to avoid unnecessary losses, but what circumstance, bearing need to be replaced, and how should we go to judge whether the bearing is available? Mainly considering bearing damage degree, mechanical properties, importance, and operating conditions, to the next overhaul period. If there are the following defects cannot be used again, new bearing must be replaced. Inner ring and outer ring, rolling element and cage on any one have crack or gap.
1, ring, rolling body fracture on any one.
2, rolling on the pavement, guard, rolling body significant card.
3, keep wear significantly significant relaxation or rivet.
On page 4, raceway and rolling body rust, injury.
On page 5, raceway and rolling body severe creasing and mark.
6, inner ring diameter or outer diameter surface has obvious creep.
7, due to the hot color change is obvious.
8, the bearing grease sealed, sealing ring or dust cover breakage is obvious.
NSK bearings imported whether should be the repair concrete judgment method, namely the bearing have make full use of the near destruction of specific judgment method is as follows:
1) use of bearing working condition monitoring instrument
Using SPM or I - such as iron spectrometer ID1 type bearing working condition monitoring instrument to determine the working state of bearing and decide when bearing should be the repair, this is the most convenient and reliable method.
When using HD1 type instrument, for example, when a pointer by warning area close to the danger zone, after the measures such as to improve the lubrication pointer has not returned, can determine the NSK bearing import is itself, but has not yet come into the danger zone, at this time will be bearing repair service. Exactly how far away from the danger area began to repair, can be adjusted by the experience.
Use of such instruments, can make full use of bearing working potential, and in a timely manner to the bearing repair service, and can avoid failure, is safe and economic.
2) using simple tools to monitor
In does not have the occasion of the instrument, the operator can hold or wrench tools such as conflict of round the closest bearing machine shell parts, ashamed of tools to monitor the ear by the sound of bearing operation tools, use medical stethoscope modification can also, of course. The normal working of bearing should be uniform, smooth not harsh voice, not the normal working of bearing has a wide variety of intermittent, impact or harsh voice. First have to get used to the normal working of bearing ring, then can grasp the judgment NSK import bearing abnormal sound operation, and then through the accumulation of practical experience, and further can analyze what kind of what kind of bearing abnormal sound corresponds to the abnormal phenomenon. Bearing abnormal sound of category a lot, it is difficult to talk, mainly by experience accumulated.
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