Details The Los Angeles Abrasion Machine is used to measure the degradation of mineral aggregate 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 balls. The test is widely used as an indicator of the relative quality of various sources of aggregate having similar mineral compositions. The Los Angeles Abrasion Machine tests crushed rock, slag, and gravel samples for resistance to abrasion by rotating a sample of aggregate material with steel charges for a specified period of time.NEW DESIGN: The LA Abrasion Machine has been updated with a VFD motor drive and new controls that offer power savings, smoother running, cooler operation, and less noise from the drive system. The new control system allows users to jog the drum into position for loading and unloading test material.