Northrock Electric Vibrator Motors Northrock internal concrete vibrators are built to take a beating. Electric motors are protected by a high strength cast aluminum housing that also dissipates potentially damaging heat. A rugged shock absorbing frame protects the housing while acting as a convenient carrying handle for the unit. Watertight, strain relief power cords take all kinds of abuse on the job and power switches are protected by the frame. Northrock concrete vibrators offer just the right mid-frequency and force characteristics required to set material particles in motion fast, for rapid consolidation of homogenous mixes. At the same time, these optimum frequencies avoid the possibility of destroying important pressure-relief chains produced by small air bubbles. These relief chains are known to resist damage during freeze-thaw cycles in colder climates. They are not protected by competitive higher frequency systems which tend to destroy them. The Northrock vibrators are designed to maintain these optimum frequencies regardless of slump, head size, or other load factors. Features: High strength cast aluminum housing Rugged shock absorbing frame Easy access to all serviceable parts Shaft length and head diameter available up to 2-1/2" in diameter Motor size is selected to maintain an in-material working frequency of about 10,000 Vpm under load Weight: 1-1/2 hp 19 lbs, 2 hp 23 lbs, 3 hp 25 lbs. 1-1/2 hp 13 Amps, 2 hp 15 Amps, 3 hp 19 Amps All Northrock power units may be configured to drive alternate brand shafts and heads UL/cUL Listed Freight: Freight Not Included |