SER1 Useful web sites - was bearing question

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HI Michael and the rest,

thanks for the help. I also went to SKF.COM and got the specs on the 
bearing. I recommed the Interactive Engineering catalog. Lots of good data 
in there. Anyhow, the bearigs I was sold are up to the specs I need.

From SKF.COM I was told that these bearings are rated at 8500 rpm, low heat, 
low friction etc etc. Next I wanted to know what rpm the bearings will be 
spinning at any given speed.

I found a very good web site with on-line tools for caluclating things like 
tire sizes, metric/imperial conversions, rpm etc. Worth adding to your 
favorites:

http://www.4lo.com

TTYL

Jeremy Brooks
Hamilton Canada


From: Michael Carradine <mc@xxxxxxxxx.xxx>
Reply-To: series1@xxxxxxxxx.xxx
To: series1@xxxxxxxxx.xxx
Subject: Re: SER1 Bramber Trailer -  Sorry no LR content
Date: Wed, 21 Jul 2004 17:55:23 -0700


Jeremy,

Sealed bearings should not overheat, unless they used for the wrong
application.  For instance, if you have a bearing for an intermittent use
that is used full time in a heavy application.  Trailer bearings that I'm
familiar with are usually heavy ball bearing type packed in grease, and
for trailers that go in water such as a boat trailer use a 'bearing buddy'
which essentially tries to seal out the water and has a grease fitting.
I suppose roller bearings are OK.  More importantly, bearings for trailers
should be checked and if necessary re-packed every year or two,
depending on use.  If you feel the bearing specialist has given you the
correct bearings for the application, then I would leave them 'as is' for
now.  If the trailer spends much time in the water, or for your next
dismantling or servicing, then you can consider prying off the seals.
In other words, have a Fosters  ;-)

Michael Carradine
1950 80" RHD ex-MOD
Currently with no current -- possessed by Lucas, Prince of Darkness

At 04:26 PM 7/21/2004, you wrote:
>Hello All,
>
>I've  got a question about wheel bearings. I have a UK made Bramber boat 
>trailer and want to replace the bearings. This trailer has brakes on the 
>hubs and the original bearings are un-sealed ball bearings. I went to a 
>specialist in bearings and they recommended a set of SKF sealed roller 
>bearings. These fit nicely; I presumed I was done with the job. For a day. 
>An engineering friend dropped by to see the progress and he raised the 
>question of sealed versus open bearings. He suggested prying the seal open 
>on the new set of bearings and to hand pack them. The rationale being that 
>in this application (my trailer) open bearings are better able to handle 
>the heat. Sealed bearings would over heat, loose all their grease and 
>eventually fail.
>
>So - what is the opinion of the list - are sealed bearings suitable on a 
>braked hub? Will prying off the seal and hand packing fix the problem?
>
>Thanks
>
>Jeremy Brooks
>Hamilton Canada
>
>PS - since we are off topic lets get some LR content  - I carry a Drascombe 
>Longboat on the trailer, towed by the 107. The Drascombe is arguably the 
>Land Rover of boats.
>
>
>
>To change subscription see www.landrover.net/series1/mail


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