Hi guys. I need to machine away the corner of a neodymium magnet that needs
to go into a hole in a mold. One of the passages for a core intersects the
hole the magnet is going to get pressed into. There really isn't any other
place to put the magnet, and the core is a necessary part of the casting.

Any tips or suggestions?

The best thing I can think of is to just use the little bench top belt
grinder.

The problem is if the prototype is satisfactory I may find myself making a
bunch of these molds. Hand grinding one is no big deal. 20 or a hundred...
well that could be pretty time consuming.

I know they are fragile. That's why I think grinding is the best option for
just one. I do not want to put a grinding wheel on one of my mills, and the
little no-name mill drill still comes in handy from time to time (I used it
today), so I'm not crazy about filling it up with grit either.