Also do you think that they are much more dangerous than regular
1/2-1HP grinders.

thanks

Ignoramus

This is a big grinder as things so. But I can't figure out how the
wheel size relates to the power. Or possibly how wheel size changes
power. Of course size cvan be a factor in safety but a friend in a
blacksmith shop has three grinders ove 10 HP and has no problems. He
knows how to handle things like this.

Do you have the proper power for this? Probably 3 phase 220 or more.

Bob AZ