quick overview :

Los Angles Abrasion Testing Machine Los Angeles Abrasion Testing Machine is used for determining the resistance of small size coarse aggregates and crushed rock. It consists of a hollow cylinder, mounted on a sturdy frame on ball bearings and with a detachable shelf which extends throughout the inside length of the drum catches the abrasive charge and does not allow it to fall on the cover. The drum of this machine is rotated at a sped of 30-33 rpm by an electric motor through a heavy-duty reduction gear. It is supplied completely with a tray for collection of the materials with revolution counter and abrasive charge.