Broken magnets.

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Model T Ford Forum: Forum 2012: Broken magnets.
Top of pagePrevious messageNext messageBottom of page Link to this message  By Allan Richard Bennett on Tuesday, August 28, 2012 - 03:27 am:

I have flywheel apart at the moment for a complete re-build. I tried the recommended 'rap the magnets' to reveal possible cracked/ broken ones. I found 4.
These show no signs of previous cracking, as the made a clean break each time. Am I rapping them too hard? I gave the open end of each a sharp tap on my bench vise. The others all stood up to the treatment and ring well.

Allan from down under.


Top of pagePrevious messageNext messageBottom of page Link to this message  By kep NZ on Tuesday, August 28, 2012 - 03:43 am:

Possibly too hard. If it were me doing the test each one would break but not because the magnets were weak but because i was hitting them.


Top of pagePrevious messageNext messageBottom of page Link to this message  By Bede Cordes, New Zealand on Tuesday, August 28, 2012 - 06:15 am:

Allan,

I had similar results to you with a couple of 24 flywheels I stripped a few years ago. Recently, I stripped the magnets off a 26-27 flywheel and not one magnet broke when rapping them. Most of these magnets recharged on my recharger to lift 4 pounds +, a few would dead lift 6 (no grinding ends or cheating either, as is, straight off the flywheel).

magnet

I hit them reasonably hard too (holding them in the apex of the v between forefinger and thumb, which allows for only so much of a "rap", I think.

Thanks to Ron Patterson for informing me to do this years ago, the magnets that broke back then would have gone into an engine had it not been for this forum.

Regards,
Bede


Top of pagePrevious messageNext messageBottom of page Link to this message  By Charlie B actually in Toms River N.J. on Tuesday, August 28, 2012 - 08:09 am:

Better if they go in your hand hard rap or not. There has to be existing damage there if they split. On the other hand, properly installed they might never break.


Top of pagePrevious messageNext messageBottom of page Link to this message  By Kohnke Rebabbitting on Tuesday, August 28, 2012 - 01:07 pm:

Keep doing what you are doing Allen! Good ones do not break!


Top of pagePrevious messageNext messageBottom of page Link to this message  By Ron Patterson-Nicholasville, Kentucky on Tuesday, August 28, 2012 - 01:13 pm:

Model T magnets are forgings, if they break there is a flaw.
Ron the Coilman


Top of pagePrevious messageNext messageBottom of page Link to this message  By Garnet on Tuesday, August 28, 2012 - 11:10 pm:

I'd much rather see them break from a hard rap on the bench instead of inside the transmission. You've cut down the odds of having some future headaches there Alan.

Garnet


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