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02-04-2009 | 03:39 PM

#51

DarZeelon

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From: Rosh-HaAyin, ISRAEL

RE: about bearings

Quote:

ORIGINAL: gkamysz

If you were an engineer that would be a guess, not even a good one.

OUCH!!! That hurt, Greg....

I am not an engineer by academic degree, but an economist and a software testing engineer by trade.

However, I believe my lingual skills are pretty good...

I am a little more than an acknowledged amateur; as far as bearing engineering is concerned. But I do understand the lingual term 'seal'...

A non-contact bearing seal, isn't... It is just a soft shield, designed to prevent most FOD, but not designed to actually seal the bearing...

So, why the heck does NSK call it a seal?
Is it because shields are normally made of steel; and since a synthetic rubber/plastic material (which cam seal) is used for it, it is called a seal, even though it doesn't???

As to service life and running conditions; The service life of a contact seal in a bearing depends, among other things, on the RPM it is spun.

But it could easily be said that the service life of these contact seals, is much longer than the average life expectancy of a glow engine...

If you can show me the rating in any on-line catalog that says the service life is shorter, please do...

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