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National 92450 Mongrel XL Grinder Polisher

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National 92450 Mongrel XL Grinder Polisher

Regular Price: $21,420.00

Special Price $18,460.00

Finance this product for as little as $358.55 per month! Click here to learn more.

Reliable, durable and professional finishes are hallmarks of National’s 92450!



Reliable, durable and professional finishes are hallmarks of National’s 92450. More than a grinder, it removes tough coatings, skillfully profiles concrete for new coatings and flawlessly polishes concrete to a mirror finish. Our HexFlex driver technology produces consistent and uniform results with all types of diamond tooling.


  • This propane powered grinder and high-speed polishing system sets the standard for commercial reliability, durability and professional finishing.
  • The machine is loaded with a 12-volt onboard battery, electric starter and a 9 gallon (34 liter) onboard water supply.
  • The internal “above pad” water dosing system enables floor wetting and prevents wetting walls and merchandise.
  • The filters are easily accessible for quick maintenance.
  • This system efficiently prepares concrete for coatings, dye stains, densifiers and polishes to a 3500 high gloss shine.
  • The side port dust ejection hose attachment enables easy dust collection when ran dry.
  • Designed to be used in conjunction with National's 3409 dust collector in "dry" grind applications.
  • A seven-gauge metal construction houses the media container with an applied hammer tone powder coat finish.
  • The 135 pounds of removable weights combined with the machine provide up to 500 pounds of down pressure.
Additional Information

Additional Information

Product Type Surface Preparation
Condition New
Product Type Hardware > Tools > Flooring Tools