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Posted by campingstoveman on July 15, 2008, 9:12 am
Please log in for more thread options Charles,
A sealed bearing is only as good as the seal which is fixed but the inner
must still rotate therefore there must be a gap. The seal is generally to
retain the grease and keep out the dirt.
Martin P
> On Tue, 15 Jul 2008 13:34:46 +0100, Peter A Forbes
>
>>On Tue, 15 Jul 2008 13:17:13 +0100, Charles Ping
>>
>>>I have an oily problem with a dynamo on an old engine. Oil leaks from
>>>the engine, past the drive gear, lubricates a ball bearing (which it
>>>is supposed to do), defeats a felt seal and then soaks the dynamo
>>>windings.
>>>
>>>If I replace the ball bearing (an RLS4) with a sealed version will
>>>this stop the oil flow and negate the need for the felt seal? I figure
>>>that if the seals can keep the lubricant in the bearing then they
>>>should be stop the oil even getting to the felt seal let alone the
>>>windings.
>>>
>>>Comments?
>>>
>>>Charles
>>
>>How much crankcase pressure is there from the engine?
>>
>>A sealed bearing will be fine.
>>
>>Peter
>
> almost none - it vents all over the place (lately all over the
> magneto)
>
> Charles
>
>
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>the engine, past the drive gear, lubricates a ball bearing (which it
>is supposed to do), defeats a felt seal and then soaks the dynamo
>windings.
>
>If I replace the ball bearing (an RLS4) with a sealed version will
>this stop the oil flow and negate the need for the felt seal? I figure
>that if the seals can keep the lubricant in the bearing then they
>should be stop the oil even getting to the felt seal let alone the
>windings.
>
>Comments?
>
>Charles
>
>http://www.homeworkshop.org.uk