Once you start adding pulleys and belts your vibration will increase. Which isn't a good thing when spinning the nasty stuff.
You're mistaken. You're saying that removing a direct-drive, rigid-mount, high-rpm hard shaft coupling will have less structural vibration than a system that offsets the motor from the final drive shaft by means of pulleys on bearing shafts, and power transmitted via a belt? Ask yourself, why did some motorcycle manufacturers opt for belt drive systems over shaft or chain, which are inherently more durable?
I think you'd better pick up a high school shop text and start reading.
I would be more inclined to wait and find a higher hp motor for the right price.
Couldn't agree with you more.
I've heard ALLOT of stories of off kilter vibrating disasters with oil centrifuges.
Yes, a rigidly mounted motor of this rotational velocity and power will certainly induce quite a bad vibration if forced to spin something that is not properly balanced.
Find your self some junked up old woodworking machines with 3hp 220v motors
Exactly. My table saw uses a large 3450 RPM motor... connected to the blade shaft by means of a belt. Not only does it make for good power transfer, it also reduces vibration. Yes, I'm sure SOME power and torque is lost in the process, but given that I can put a 2" thick plank through it at a good clip, I'm not terribly worried about it.
My system WILL have a belt drive.