Re: Re: Weld on cast iron

Posted by Mark on February 03, 2004 at 06:10:37 from (199.46.199.233):

In Reply to: Re: Weld on cast iron posted by RAB on February 02, 2004 at 15:32:36:

Very interesting observation. My brain is saying, how did the ground off iron, become magnetized?

Only 2 ways I can see: 1. It was rubbed on a magnet or 2 it passed through a magnetic field.

If we are talking about residue from grinding off the weld, the "sparks" could have flown past the body of the grinder. With very small particles (which they normally are) and a big grinder (1 to 2 hp) this is highly possible. Apparently the magnetic field, generated as the grinder motor turned, must have been strong enough to extend well outside the body of the grinder such that it could influence the sparks as they went by.

Hmmmmmmmmmmmmmmm....very interesting.

Course, the softer the ferrous material the more easily it is magnetized and I usually grind steel, not Iron, which is much softer and more easily influenced.

Mark

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