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 spheres.
The test is widely used as an indicator of the relative quality of various sources of aggregate having similar mineral compositions.
This design follows the ASTM-preferred design and features a welded, structural-steel frame, fabricated .5"-thick (913mm) abrasion-resistant steel drum, a removable shelf, bolted to the drum and a balanced drum assembly for easy rotation by hand. The enclosed chain drive rotates the drum without a conventional slip clutch. This positive drive delivers greater accuracy. The self-contained LA Abrasionorm-drive motorized speed reducer has anti-friction bearings and seal LA Abrasioned lubrication. The 1hp, electronically-controlled motor is equipped large, push-button controls and an automatic overload cutout.
Unit Includes user-configured, revolution counter, a material catch pan and one abrasion charge consisting of 12 hardened-steel balls. Dimensions: 39" x 29" x 37" (991 x 737 x 940mm).