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Re: Magnetic sump plugs - long ...think about it :=_

To: "Guy Weller" <guy@weller-lakes.freeserve.co.uk>, "Robert E. Shlafer" <PilotRob@webtv.net>
Subject: Re: Magnetic sump plugs - long ...think about it :=_
Date: Thu, 6 Jun 2002 18:29:50 -0400
Cc: <midgetsprite@yahoogroups.com>, <spridgets@autox.team.net>
References: <13375-3CFF35A3-1269@storefull-2177.public.lawson.webtv.net> <004b01c20da3$368aeda0$0100a8c0@upstairs>
If a small metal particle is suspended in oil
the viscous surface tension of the oil to metal,
is probably high enough (even hot) to not let the 
particle change trajectory towards a side magnet
as it zips by in the rushing oil stream.

I do believe the 'reservoir's (sump) of oil moving more
slowly would at least let gravity take over and settle
to the bottom.

Even a rare earth magnet (read as...super strong) used
in the drain plug, is not going to magnetize a tranny case
to any extent that would attract a metal particle.  The 
reason being 'where' the magnetic field lines lay. If anything, 
a round pole magnet like those used in the drain plug, would
 most like be poled ,...end to end. 

So the magnetic field is being radiated out, vertically, through 
the case. Just front and rear of the drain plug where the magnet 
would be would both be exposed to the same polar field in 
orientation and strength. The thickness, of the case, would be 
the only polar variation. 

So... does that mean...if anything... that  the case 'could' possibly 
be magnetized... inside to outside?

Now...  since the case curves up on its sides...the 'surface' 
of the tranny case in now running 'parallel with the magnetic
 field lines.  Try stacking a few toy bar magnets in that config. 
 ... a box made of four magnets...yes.... try laying that last one 
down, as if it's a drain plug at the bottom of the box.

Paul Tegler

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