The award winning UltraGrind Floor Ginder / Polisher is Aztec’s propane-powered, planetary head, gear driven, concrete grinding and polishing machine. The UltraGrind has been designed for the more aggressive concrete floor grinding and polishing applications, where the goal is to both remove material and highly polish concrete floors. Weighing more than 500 lbs (227 kg), the UltraGrind provides the ideal 40 lbs of head pressure per diamond abrasive for maximum results. Keeping IAQ in mind, the UltraGrind has industry-standard 2-inch exhaust ports for concrete dust vacuums. The Aztec UltraGrind is powered by the 18hp PurePowerLPG 600 Series engine, featuring a heavy duty canister air filter. All of Aztec’s propane machines are CE, EPA/CARB, LEED and GS-42 certified, as part of the WorkSmart TM system. PROUDLY MADE IN THE USA.