Los Angeles Abrasion Machine - AF-AG-191

Used to measure the degradation of mineral aggregates of standard gradings resulting from a combination of actions including abrasion or attrition impact and grinding in a rotating steel drum containing a specified number of steel spheres.  

Consists of a hollow steel cylinder, closed at both ends having an inside diameter of 711mm and an inside length of 508 mm.

The drum rotates at 31-33 rpm.  Supplied with an automatic digital counter that shows the number of revolutions for the drum.