On Monday, September 16, 2019 at 4:18:33 PM UTC-5, Bob La Londe wrote:
I do have a couple bench grinders mounted on a stand that
has a pickup truck wheel filled with concrete for a base. It works
pretty good.

Not sure why you think so much weight is necessary for a bench grinder. I have two bench grinders on Harbor Freight metal stands. The grinders are mounted on wood blocks bolted to the top of the stands. Stand weighs 5 pounds. Each grinder weighs 25 to 50 pounds. They work perfectly fine for grinding metal. When I use a bench grinder I let the 1800 or 3600 rpm spinning wheels take the metal off. I don't use all my muscle and weight to force the metal into the wheel. Not necessary. The spinning wheels grind the metal off more than fast enough. And help to keep the metal cooler, which is important.