Aluminum Oxide Abrasive Coarse Grit (20)

Description features:Coarse grit(20) aluminum oxide abrasive in 50 pound bags Aluminum oxide is an extremely sharp, long lasting, blasting abrasive that can be recycled many times. It is the most widely used abrasive in blast finishing and surface preparation because of its cost, longevity and hardness. Harder than other commonly used blasting materials, aluminum oxide grains penetrate and cut even the hardest metals and sintered carbide. Approximately 50% lighter than metal media, aluminum oxide has twice as many particles per pound. The fast cutting action minimizes damage to thin materials by eliminating surface stresses caused by heavier, slower cutting media. Aluminum oxide has a wide variety of applications, from cleaning engine heads, valves, pistons and turbine blades in the aircraft industry to lettering in monument and marker inscriptions. It is also commonly used for matte finishing, cleaning and preparing parts for metallizing, plating and welding. Aluminum oxide is the best choice for preparing a surface for painting. Aluminum oxide does not contain any free silica and is therefore safer to use than sand. The grit size is consistent and it cuts much faster than sand, leaving a smoother surface. The larger the abrasive grain size, the faster it will cut, but consider the size of perforations or holes through which the grit must pass without wedging due to the need for screen separation of parts from media after use