As a Journeyman Maintenance person, I have installed, and moved a lot of various equipment. An Air compressor has a lot of torque produced when starting, and a lot of vibration during operation. That energy has to be dissapated somehwere, and somehow, if the life of the equipment is to be prolonged. I would suggest placing mud flaps under the pallet, covering the underside of the pallet, and about 1 "extra. Then place some 2-3" pieces of 2"x2"x 1/4" angle near the corners of the pallet, drill and bolt the angle to the pallet. Then drill a hole in each angle for a "thunderstud" concrete anchor, 1/2" should do, about 4" long. Then rent a concrete drill from Home Depot, and drill clear or completely thru the concrete. A thunderstud has a sleeve, and a tapered part near the bottom of the anchor, that wedges into the concrete hole to tighten. This way, if you want to move, or replace the machine, simply remove the tightening nut, and hit anchor with hammer and the anchor goes through the concrete, and dissapears, nothing to be in the way of anything sliding, or walking on the floor. Most other anchor types leave something annoying in the floor, so the next piece of equipment has to be positioned somewhere else to be level, or avoid the nuisance left from the previous anchor.
Yes this sounds like extra work, but it is your equipment, your investment.
