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Engine Specific Info and Questions => IDI Engine => Topic started by: Brian schanafelt on February 20, 2015, 04:52:31 pm
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My connecting rods are magnetic, any way to de magnetise them? The studs and cap are able to pick up any metal I get them close too
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Your local machine shop may have a degausser.
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Keeps it out of the oil. Like one of those plugs in the oil pan?
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you could just drop them on the floor from above your head, but not sure you want to actually do that
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A few years ago i dabbled in watchmaking.
After buying a cheap chinese de-magnetizer that i determined would work far better in 240vac countries, I realized that it's the exact same thing as a bulk tape eraser, and dug out of a closet an eraser i bought at a thrift store ages ago because it looked useful. It was designed for reel-to-reel tape. Big electro-magnet. Basically an EI-core transformer that is missing the I and the secondary coil.
this sounds like i am just telling stories at this point, but here goes:
The method is to have a field that is strong enough to magnetize the metal, get the metal right near the source of the field - almost touching. then draw it away slowly.
The concept is that the electromagnet has to be strong enough to magnetize the part, and then you magnetize it. But since this is a coil on alternating current, it switches polarity 60 times a second (in north america and some other regions). So then you pull it further and further away from the source of the field, slowly, so that the magnetization is weaker and weaker.
I use an orienteering-style see-through compass to verify that a given item no longer has significant magnetism.
Once i got a hang of the method, I was able to demagnetize objects as large as a finishing hammer.
A whole rod, though - yeah, start calling machine shops.
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It's more present around the studs, I found a couple articles on objects that had machine work done on them would put off a magnetic signature. And it would be in my best interest to get rid of the magnetising effect because of the way the field attracts metal it can actually pull a piece of metal debris towards the strongest point of pull, it could either be pulled towards the north or south poloratary and if your unlucky enough it could be pulled into a bearing surface... Some machine shops should have a degausser that can get rid of this
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Shops that have a magnetic chuck, should be able to switch the chuck to de-mag mode, for this specific use.