Which cheap grinder?

Is it possible to have TOO much power for your grinder? I see grinders up to 3 HP, but I ask because I have a couple of 5 HP motors sitting around. Could these be used if I got a GIB or KMG w/o motor?

You could use them, others have 5hp grinders, kmg and gib (If you build it well) can probably take the power. Achieving correct belt speed is important, adjusted by drive wheel size, pulleys or a vfd.
 
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