Employed to assess the abrasion crushed slag, And both crushed and, Resistance of crushed rock uncrushed gravel the device features a cylindrical shell that is securely attached laid out side by side on a study frame and The ball bearings feature an access point which is capable of being sealed with a dustproof lid, Enabling efficient charging and discharging the cylinder containing the featuring a, Test material removable shelf that runs the entire inner length of the cylinder, Which catches the abrasive powers up without letting it drop onto the lid. The drum is turned by an electric motor via a robust reduction gearbox operating at a velocity of 30, 33 rpm. The frame comes with a revolution counter, And a tray is included for collecting featuring an abrasive finish on the material after testing charge composed of a collection of twelve durable steel pieces spheres, Around 48measuring mm designed to, Across dia function at 440 volts in a three-phase system 50 cycles, A. C. Supply.