Here are the 4 hand grinders I could find. I think that is all of them.
I have to wonder what the deal is with hand grinders and not having the stones concentric. I can't recall ever seeing one with a stone on it that was not bobbing up and down...
This one is a future project for a low speed grinder I want to build. I'll use an intermediate jack shaft to drop the speed, (and a slower speed motor)
This one is either a jewelers or watchmakers stand I believe. I want it for polishing small parts.
And then, my "main" grinder, a 1/2 HP Craftsman Commercial from the 60's that runs as smooth as silk!
EDIT: You can see the mounting block I use for holding these racked bench tools for the tool above the grinder. Sort of a fat upside down "T" I have 4 tools racked in this "shelf" setup and more planned for, after a planned major reorg of my garage (Waiting on the completion of a storage shed...)
I also have another heavy cast iron Grinder stand (makes the dark red one look a bit lightweight...) that is buried and needs to have the Babbitt bearings re-poured. I turned the shaft years ago and just never got back to it.
Lastly is a POS ultralight 5" grinder that is so bad I can stop it easily and I have to nurse it for load pressure on either the wire wheel or grinding stone sides...