Hi John,
I have a suggestion for those planning a cruise. Most of the time even
if we are using pre-packed bearings only one side of the bearing needs a
seal. If one removed the seal on one side of the bearing with plans to
locate the open side in a fashion that the seal is not needed one could
over pack the bearing to a point that ball movement was a minimal issue.
Then stored in the original paper and stored in a vacuum packed plastic
bag to keep moisture out. This may reduce the bearing storage issue.
Or
Don't worry about it, and remember that even if you have to replace the
bearing in a remote location, and it's condition had been compromised,
you would likely be where you could get a new one by the time the
replacement failed. My experience says that you would have a rust issue
before any other kind of failure of machinery on a voyage if you leave
port knowing the condition of your vessel.
Although I prepared well before cruising, I must admit that the failures
I had, I knew better than to leave port with the item in question
unserviced. I never found myself in trouble at sea but was
inconvenienced because of my over powering desire to get under way. I
stocked parts with a high failure rate only. There is only so much room
on a Catalina 30 whose go fast line had been raised by 6" of bottom paint.
The desire for a perfect product will not make it so. Visit any salesman
at a boat show and ask him how many quality brand boats have been
disabled because of failure at the boat shows he has attended. If he
says he has never seen such a condition, he is new to sales in the
industry, or is not someone I would buy a boat from.
Kevin Pemberton
On 12/14/2012 07:36 AM, John Green wrote:
> Hi, Kevin, I agree with you that the issue is probably insignificant,
>
> other than that if you are carrying a spare bearing, and going places
> where bearings are not readily available,
>
> it might be best to store it on it's side.
>
> The information session I attended though did not seem to consider the
> ball or roller, just the 'brinelling' of the races themselves, which
> can be 'redirected' by storing on the side, so that the brinelling
> occurs on a part of the races that is not used when the bearing is
> installed.
>
> I agree with you too that it might be better to damage the bearing, or
> run risk of it, rather than put up with the prop drag for every mile
> covered. Keeping things simple, as you say, there is generally lot's of
> warning time for a bearing failure, just make sure to keep the grease
> flowing!
>
> I also suspect that there is a lot of difference between a boat moving
> on swells, and a vibrating industrial building, again adding to the
> probable lower significance.
>
>
>
> John
>
>
>
>
>
>
>
> 3a. Re: Bearing Storage and Intermittent Use Posted by: "Kevin
> Pemberton" [1]pembertonkevin@gmail.com the_right_lane Date: Thu Dec 13,
> 2012 2:58 pm ((PST)) I don't think it makes much difference how the
> bearing is stored. On it's side the area the ball rests would be
> smaller maybe. The ball would still rest and the ball would still wear.
> Not on it's side the ball will still wear but the race location that
> would wear would be in the path of the working balls. A ball bearing is
> sold as a class of bearing the smaller the number the smoother it runs.
> Motors and gear housings use a low grade bearing a spindle on a machine
> tool uses a higher quality of bearing. Because surface finish is not
> being produced as it would in a machine tool what does it matter? The
> number of flat spots on race and ball will increase noise while the
> machinery is run but should last a long time anyhow. I think longer
> than most people will use the boat anyhow. A free wheeling prop may add
> drag and make a sail boat cruise at a slightly slower speed but all
> factors in design are a compromise. I would try for a faster cruise if
> it were me but you may choose otherwise. Kevin Pemberton
>
> References
>
> 1. mailto:pembertonkevin@gmail.com
>
--
Committing murder in exchange for lifestyle
makes you a "thug" not a "Rights Activist"
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