STI Prep/Master 2420

The STI-2420 is engineered for medium-sized commercial and residential surface prep or polishing projects, delivering the productivity of a larger grinder with the maneuverability and control of a compact unit. With a powerful 20 HP motor and variable speed drive, it adapts easily to a variety of grinding and polishing conditions across concrete, terrazzo, marble, and stone surfaces.

Available in 230V or 480V configurations, the STI-2420 is built for flexibility in diverse jobsite conditions. Its moveable pocket weight system allows for precise adjustment of head pressure, ensuring optimal performance whether you're cutting aggressively or finishing with finesse. A built-in water tank simplifies the switch between dry and wet grinding, improving versatility and dust control.

Equipped with four included tool plates, the STI-2420 is recommended for projects up to 5,000 square feet (500 m²), making it the go-to solution for efficient, high-quality floor finishing.