Here's a (maybe) dumb question. Will prolonged use of a magnetic indicator base on the ways or cross slide of a machine tool cause the machine itself to become magnetized?? Swarf is enough of a PITA without it really clinging to the iron parts. Seeking the voices of experience on this one.
Regards, Al.
I've been doing it for over fifty years. No static cling! Bugs
It doesn't have to be prolonged - the transfer of magnetism occurs the first time the base is both in contact and switched on.
Fortunately the magnetic properties (coercive force is the main parameter) of cast iron are so poor that there is not enough remaining magnetism to be a problem.
High speed steel is a different kettle of fish. A single switched on contact will leave the piece weakly magnetised. It is still a long way from being a useful permanent magnet because mechanical shock (bashing it with a hammer!) will get rid of most of this remaining magnetism.
Jim
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