Stone Ray 3-Head Surface Grinder & Polishing Machine — 7 lb, Wet/Dry, For Stone, Concrete & Terrazzo

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Professional surface grinding and polishing for stone, concrete, terrazzo, and more. The Stone Ray 3-Head Surface Grinder & Polishing Machine is engineered for fabricators, install ers, and restoration specialists who demand reliability, speed, and accuracy across multiple materials. Its compact 7 lb footprint and balanced 3-head planetary design make it the go-to tool for grinding, honing, and polishing in tight or detailed spaces — on floors, countertops, stairs, ledges, pools, and walls. Attaches to any variable-speed 7" grinder/polisher (not included). Uses standard 4" Velcro-backed tooling for fast, tool-free pad changes. Wet or dry capable. Key Features Lightweight 7 lb design — 8.25" working width for fatigue-free operation Three 5/8"-11 threaded heads — compatible with standard backup pads, snail-lock backers, aluminum pads, leather brushes, and more Standard 4" Velcro-backed tooling — fast, tool-free pad changes; works with tooling you already own Attaches to any variable-speed 7" grinder/polisher — not included Dust-skirt vacuum port — for clean, safe dry operation Wet or dry capable — supply water for wet grinding or connect a vacuum for dry operation 3-year warranty — against defects in material and workmanship Applications Natural stone — grind, hone, and polish marble, granite, travertine, quartzite, limestone, and slate countertops, floors, and surfaces Engineered stone — polish quartz, porcelain, and sintered surfaces to a consistent finish Concrete — remove coatings, grind high spots, hone, and polish concrete floors and countertops Terrazzo — restore and refinish terrazzo floors with precision Wood — sand and prep wood surfaces for finishing Surfaces — floors, countertops, stairs, ledges, pools, and walls Recommended Tooling The Stone Ray accepts any standard 4" Velcro-backed pad. For best results on stone and engineered surfaces: Weha Trio 3-Step Polishing Pads — fast 3-step dry polishing system for granite, marble, quartz, and engineered stone; delivers a high-gloss finish in three passes Weha Donkey Face Polish & Inline Polishing Pads — professional-grade 4" pads for face polishing and inline work on stone surfaces; ideal for edge work and detailed surface finishing Tenax Filiflex & Airflex Stone Texturing Brushes — 4" Snail Lock brushes for leathered and antique finishes on stone surfaces Tenax Silicon Carbide Antique Finish Brushes — 4" Snail Lock SiC brushes for antiquing soft natural stone How to Use Attach the Stone Ray to any variable-speed 7" grinder/polisher. Mount your preferred 4" Velcro-backed pads to the three heads. For wet operation, supply water to the work surface. For dry operation, connect a vacuum to the dust-skirt port. Work in overlapping passes at consistent speed for even surface coverage. Warranty The Stone Ray is warranted against defects in material and workmanship for 3 years from the date of purchase. Warranty excludes damage caused by misuse, improper maintenance, or unauthorized modifications. Further Reading Planetary Polisher Buying Guide: Floor Machine vs. Countertop-Specific Design — compare the Stone Ray's lightweight 3-head design against full countertop planetary polishers to find the right machine for your work Are You Resurfacing Every Marble Slab? How Shops Handle Polishing, Etching & Customer Expectations — how high-volume stone shops use the Stone Ray and planetary polishers to resurface marble, handle etching, and set customer expectations Show more