Reference Number: 137893

Grav-i-Flo / Grav Co. LLC of Sturgis, Michigan 
 
 Model C-4-806     S/N:125      MFG: 2000
 
 Specifications 
 Barrel Capacity:.......... 5.3
 Load Capacity:............ 21.5
 Force:.................... 2-22 g's 
 Space Required:........... 52 x 40 x 54
 
 Electrical 220/440v (3 Phase)
 Weight 1550 lbs.
 Drive : Variable 
 Motor 2 HP 
 
 Here is some information from Grav-i-Flo: 
 
 Construction Details 
 
 The Grav-i-Flo C-4-806 Gyra Finish Machine consists 
 of a rotating turret on which four hexagonal, 
 polyurethane barrels are mounted. As the turret
  rotates, the barrels turn in the opposite direction. 
 This unique motion develops strong centrifugal force 
 in each barrel, resulting in an extremely high rate
 of work, due to the "weight increase" of the tumbling 
 mass. 
 
 The machine is of heavy construction to withstand the 
 high "g" forces generated. Entire barrels are molded of 
 polyurethane and are inserted into aluminum supporting 
 cradles equipped with quick acting locks. For maximum 
 utilization of production time the operator may unload 
 and reload an extra set of four barrels while the 
 machine is operating. 
 
 
 Applications
 
 The Grav-i-Flor C-4-806 Gyra Finish Machine can be 
 used for wet or dry processing with a variety of medias 
 and compounds. Results range from the finest of 
 finishes on jewelry and high quality machined parts to 
 very aggressive deburring. The "g" forces produced in 
 this machine result in less part on part impingement 
 than often encountered in tumbling barrels or vibratory 
 equipment. 
 
 Parts can be finished or deburred more than twenty 
 times faster than a conventional tumbling barrel and 
 about eight times faster than vibratory finishing 
 equipment. 
 
 Applications vary from small and miniature pieces to 
 larger parts, that would otherwise require extensive 
 hand finishing. Very small abrasive medias that do not
  work well in tumbling barrels or vibratory machines, 
 because of the very slow cut or finish, are very well 
 suited for the Gyra machine.