Product Description
CMT Diamond Dry Hole Saw - 1/4" (6.35mm) Hexagonal Shank is a precision dry-cutting hole saw engineered for drilling through hard tiles, granite, marble, and artificial stone surfaces without the need for water cooling. Featuring a diamond grit cutting edge with cubo-octahedral crystals, this compact 1/4" ceramic and stone drilling bit delivers fast, clean holes with extended tool life compared to standard carbide or bi-metal hole saws. Whether you are installing fixtures through ceramic tile, cutting into natural stone countertops, or working with engineered stone materials like Silestone or Okite, this CMT diamond hole saw gives you reliable performance in a compact, drill-compatible format.
Key Features
- Diamond Grit with Cubo-Octahedral Crystals - inclusion-free, heat-resistant diamond crystals cut faster and stay sharper longer than standard hole saw teeth, meaning fewer blade changes and cleaner holes in hard stone and ceramic tile.
- Dry Cutting Capable - no water or coolant setup required, allowing for faster job setup and greater portability when drilling granite, marble, and ceramic surfaces on-site.
- Hexagonal Shank - the hex shank design locks securely into standard cordless or corded drill chucks, preventing slippage during high-torque stone drilling and improving operator control.
- Compact 1/4" (6.35mm) Diameter - ideal for small-diameter precision holes in hard tile and stone where larger saws would be impractical, giving you accurate placement in tight or detailed work areas.
- 2,200 - 4,000 RPM Operating Range - a defined speed range helps match the blade to the material hardness, protecting the diamond coating and extending cutting life across multiple applications.
- 2 11/16" Total Length - a compact overall profile that fits comfortably in standard drill chucks without excessive overhang, improving balance and control during drilling.
Why This Product
- Drilling small-diameter holes in granite or ceramic with conventional bits often results in cracking or chipping - the diamond grit construction of this hole saw bites cleanly into hard, brittle materials without fracturing the surface.
- The dry cutting design eliminates the mess and setup time associated with wet-cutting methods, making this a practical choice for finish installers and tile setters working in finished spaces.
- The hex shank interface is compatible with a wide range of corded and cordless drills, so you can put this bit to work without any adapters or special tooling.
- With a 13/64" cutting height and an operating range of 2,200 - 4,000 RPM, this bit is tuned for control and precision in small-hole applications through stone and ceramic - tasks where oversized or underpowered tools fall short.
Specifications
- Manufacturer Part Number: 552-006
- Brand: CMT Orange Tools
- Diameter: 1/4" (6.35mm)
- Cutting Height: 13/64"
- Total Length: 2 11/16"
- Shank: Hexagonal
- Recommended Speed: 2,200 - 4,000 RPM
Approved Applications
- Drilling hard ceramic tile and gres porcelain tile
- Cutting holes in natural stone - granite and marble
- Drilling artificial and engineered stone surfaces
- Dry hole sawing with cordless or corded drills
Frequently Asked Questions
Does this hole saw require water or a coolant system to operate?
No - this is a dry cutting diamond hole saw. It is specifically designed to cut hard tile and stone without water or liquid coolant, making it well suited for on-site work in finished areas where wet-cutting would be inconvenient or impractical.
What drill speed should I use with this diamond hole saw?
The recommended operating speed is 2,200 - 4,000 RPM. Staying within this range protects the diamond grit coating and helps produce clean, accurate holes in ceramic, granite, marble, and artificial stone. Always turn on the drilling machine to start rotation before contacting the material surface.
Will this hex shank bit fit my standard cordless drill?
Yes - the hexagonal shank is compatible with standard cordless and corded drill chucks. The hex profile locks into the chuck securely to prevent the bit from slipping under the torque demands of stone and tile drilling.
What diameter hole does this bit produce, and what materials is it rated for?
This hole saw produces a 1/4" (6.35mm) diameter hole. It is rated for use in hard ceramic tile, gres porcelain tile, natural stone including granite and marble, and artificial stone materials.
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