Silent Vibrator Shown here with Horizontally & Vertically mounted motors. Only one needed as per your preference. Specifically designed for foundries for quick-silent mold compacting in 8-12 seconds!! No more hand tucking for undercuts!! 3/4 HP motor for instant vibration, no delay on start up Adjustable vibration from 0-1.7 "g" at 29 hz 100% Safe, vibrating counterweights completely enclosed Totally enclosed electrical motor: 3/4 HP, 1725 rpm, 3 Phase, 60 hz Two ways to mount vibrators, horizontally or vertically Mounting motor horizontally creates vibration up and down, for best sand compaction Specially designed tables available with isolators to maintain full vibration Table capacity up to 500 lb ~ Size 24"x 30"x 29" high.  Bigger table available upon request Separate isolators available for building your own table Isolators built for 3.5" OD, 2.900" ID, wall thickness .300" Each vibrating unit has four taped mounting holes equally spaced on centerlines at 2.5" and 5.5" apart, for 3/8 NC flat head machine screws.  It also has four bolt holes on 6.5"x 6.5" square centers for mounting the unit vertically. When mounting the motor vertically you will need four spacers 1-1/8" thick and 1-3/4" in dia., with a 13/32" dia. hole.