Can you attach a drill coupled to one side of a two stone bench grinder and electrically operate both at the same time to boost bench grinder torque for grinding heavier stock?
I know that the drill is way lower rpm's, but slower grinder speed not problem; grinder boggs down. Sears 6 inch--1.2 amp-3800rpm refurbished by sears; bought at yard sale.

A 1.2 amp motor is not going to very much work.

No, I would not couple a drill motor to a bench grinder.

Definitely not. The drill is an immoveable object due to gearing.

If your grinder isn't heavy enough for your projects, you bought the wrong grinder. Fit the tool to the application.