That will ruin the bearing. They make bearing pullers, they look like two halves of a circle with a bolt on each side to keep it together. It's thin in the center to get on the backside of the bearing
Best to let whoever is going to grind the crank take those off.
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Terry
O,100,72,102,123,104,124,105
125,129,149,1200,982
(2)2182s w/60in Habans
3225
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