The CMT 552-789 Diamond Dry Hole Saw is a 3-1/2" diameter dry-cutting hole saw built for drilling through hard tiles, natural stone, and engineered stone surfaces. Designed for use with a 5/8"-11UNC threaded angle grinder spindle, this diamond-coated cutter delivers precise, clean holes in demanding materials like ceramic, granite, marble, and artificial stone composites. Filled with cooling wax to manage heat during dry operation, the CMT 552-789 is a professional-grade solution for tile and stone installation work where water cooling is impractical or inconvenient.

Key Features

• Diamond Dry Cutting Design - purpose-built for dry operation, eliminating the need for water feed systems and making the tool practical for on-site tile and stone work where wet cutting is not feasible.
• Integrated Cooling Wax Fill - cooling wax is embedded inside the hole saw body and melts progressively during drilling, managing heat at the cutting edge to protect both the diamond segments and the workpiece surface, and extending blade service life.
• 5/8"-11UNC Threaded Shank - the standard 5/8"-11UNC spindle thread mounts directly to a wide range of angle grinders, providing a secure, vibration-resistant connection without adapters.
• 3-1/2" Cutting Diameter - produces a consistent 3-1/2" (approximately 89mm) hole, sized for plumbing, electrical, and fixture cutouts through tile and stone countertops or wall surfaces.
• 1-9/16" Cutting Height - the usable cutting depth of 1-9/16" accommodates typical tile, stone slab, and countertop thicknesses found in residential and commercial applications.
• Right-Hand Rotation (RH) - matches the standard forward rotation of angle grinders, ensuring the diamond segments engage the material correctly for efficient stock removal.
• Rated to 14,000 RPM - a high maximum speed rating gives the saw the flexibility to operate across the speed range of most compatible angle grinders without risk of over-speeding the tool.
• Suitable for Hard Tiles, Natural Stones, and Artificial Stones - the diamond abrasive construction handles the brittle, high-hardness characteristics of ceramic tile, granite, marble, and engineered stone products that would quickly dull conventional bi-metal hole saws.

Why This Product

• Drilling clean, accurate holes through granite, marble, or porcelain tile without a water source is a common job-site challenge - the integrated cooling wax fill allows this hole saw to run dry while still managing cutting temperatures, making it a practical choice for field installations.
• The 5/8"-11UNC threaded mount is the standard connection for angle grinders, so the CMT 552-789 installs directly on the tools most stone and tile tradespeople already own - no specialty arbors or conversion kits required.
• At 3-1/2" diameter with a 1-9/16" usable cutting height, this hole saw covers the opening sizes and material thicknesses most commonly encountered when fitting plumbing supply lines, drain outlets, or electrical conduit through stone countertops and hard-tile walls.
• Diamond abrasive construction is the correct tool material for hard, brittle stone and ceramic surfaces - it cuts by abrasion rather than tooth engagement, which means clean edges with reduced chipping risk on finished tile and polished stone faces.

Specifications

• Manufacturer Part Number: 552-789
• Brand: CMT Orange Tools
• Diameter: 3-1/2"
• Cutting Depth: 40mm
• Cutting Height: 1-9/16"
• Total Length: 2-3/8"
• Shank: 5/8"-11UNC
• Rotation: Right-Hand (RH)
• Maximum Speed: 14,000 RPM
• Material: Diamond (DP)

Approved Applications

• Cutting holes in hard ceramic and gres tiles
• Drilling through hard natural stones including granite and marble
• Cutting through artificial and engineered stone surfaces