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OF20S-L120 | Multi-Surface Planetary 20" Concrete Floor Grinder & Sander | Single Speed Low

Availability: in stock

SKU: 249203


The Onfloor OF20S-L is a multi-surface planetary concrete floor grinder, exterior wood deck sander, interior wood floor sander that is equipped with Onfloor’s patented triple-belt technology.

The OF20S-L operates on 110-120V and is powerful enough for professional users yet simple enough for almost anyone to operate and maintain. The low tool speed (500 rpm) of the OF20S-L makes it an ideal multi-surface machine for low-speed applications such as wood floors and decks.

The OF20S-L also incorporates Onfloor’s patented tool attachment system that is known for being the fastest tool change in the industry.

Tooling packages are available for a multitude of applications including:

Concrete Surface Preparation | Epoxy Removal | Mastic/Glue Removal 
Wood Floor Sanding/Refinishing | Stone Polishing | Wood Deck Restoration

  • 20” Cutting Path: More production in less time.
  • Multi-Surface Capability: Grind Concrete, Stone, Terrazzo, Wood Floors, Wood Decks, and more.
  • Lightweight High Speed: Faster operation and easy mobilization.
  • Up To 198 lbs. Grinding Pressure: Increases productivity with more grinding pressure.
  • Patented Triple Belt Planetary: Creates more torque with less power.
  • Patented Flexible Tool Plates: Follow the contour of the floor for faster production.
  • Removable Handle: Reduces overall height for mobilization.
  • Self-Maintenance Platform: Replace belts and bearings in minutes not hours.
  • Wet/Dry Operation: The machine operates dry with a dust collector or wets with water.





2 HP/110-120V 50/60HZ

Full Load Amperage


Tool Speed

625 RPM

Cutting Width


Vacuum Port

1.5" or 2"

Minimum CFM



190 lbs

Grinding Pressure

170 lbs

Optional Weight

28 lbs (1 max)

Shipping Dimension

L: 30" x W:24" x H: 42"

Shipping Weight

210 lbs