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Posted by Nick Mueller on April 24, 2008, 7:00 am
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Wes wrote:
> And in addition, do not spin the bearings with compressed air.
... with a finger sticking in the bore? :-)
Nick
--
The lowcost-DRO:
<http://www.yadro.de>
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Posted by 42 on April 24, 2008, 12:13 pm
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>
>>I use it all the time on dirty bearings, but you'll have to re-lube them
>>after cleaning.
>
>
> And in addition, do not spin the bearings with compressed air.
>
> Wes
I've heard that many times, what is the reasoning?
42
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Posted by on April 24, 2008, 12:49 pm
Please log in for more thread options >
>
>
> >>I use it all the time on dirty bearings, but you'll have to re-lube them
> >>after cleaning.
>
> > And in addition, do not spin the bearings with compressed air.
>
> > Wes
>
> I've heard that many times, what is the reasoning?
> 42
If its a typical wheel bearing, that is an inner race, the rollers/
balls, and a cage, but no outer race, if you spin the bearing with air
you can get the balls to fling out of the cage.
There was some speculation here awhile back that you could get a
complete bearing with an outer race to fail as well (other than just
damaging things from the lack of lube), don'y know if anyone nailed
that one down.
Dave
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Posted by Larry Jaques on April 24, 2008, 2:09 pm
Please log in for more thread options On Thu, 24 Apr 2008 09:13:14 -0700, with neither quill nor qualm, "42"
>
>>
>>>I use it all the time on dirty bearings, but you'll have to re-lube them
>>>after cleaning.
>>
>>
>> And in addition, do not spin the bearings with compressed air.
>>
>> Wes
>
>I've heard that many times, what is the reasoning?
If you spin it too fast and the outer land and cage can come off the
balls, it can take fingers off. I still blow 'em off, but I don't spin
'em much any more.
--
Happiness in marriage is entirely a matter of chance. If the dispositions
of the parties are ever so well known to each other or ever so similar
beforehand, it does not advance their felicity in the least. They always
continue to grow sufficiently unlike afterwards to have their share of
vexation; and it is better to know as little as possible of the defects of
the person with whom you are to pass your life.
-- Jane Austen, Pride and Prejudice, 1811
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Posted by newshound on April 24, 2008, 3:51 pm
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>>I've heard that many times, what is the reasoning?
>
> If you spin it too fast and the outer land and cage can come off the
> balls, it can take fingers off. I still blow 'em off, but I don't spin
> 'em much any more.
>
> --
This may be true; the other reason is that the fatigue life of rolling
element bearing is quite sensitive to surface damage and with a completely
unlubricated bearing spun fast this may occur; certainly if there is any
grit around when it is spinning that will be enough to create fatigue
initiation sites. Of course most ball bearings fail for other reasons than
fatigue.
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