Product Description
CMT Diamond Dry Hole Saw - 5/16" x 1 3/8" x 2 3/8" by CMT is a precision dry-cutting hole saw engineered for drilling through hard tiles, natural stones, and artificial stones using an angle grinder. With a compact 5/16" cutting diameter, this tool delivers clean, accurate holes in dense, brittle materials like ceramic, granite, marble, and engineered stone - without the need for water cooling. Filled with cooling wax that activates during use, it protects the blade and workpiece during dry operation, making it a practical solution for tile and stone installers who need reliable, on-the-spot hole drilling performance.
Key Features
- Diamond dry hole saw design - purpose-built for cutting hard tiles, natural stones, and artificial stones without water, giving installers flexibility to work in environments where wet cutting is impractical.
- Cooling wax fill - the internal cooling wax melts during drilling to regulate blade and workpiece temperature, extending blade life and helping maintain cut quality over repeated use.
- 5/8"-11UNC shank - compatible with standard angle grinder spindle threading, allowing direct mounting without adapters on most common angle grinders.
- Right-hand rotation (RH) - matches the standard rotation direction of angle grinders, ensuring safe, stable operation without counter-rotation risk.
- 14,000 RPM maximum speed rating - rated for high-speed angle grinder operation, letting the diamond cutting surface work efficiently through dense stone and tile materials.
- 35mm (1 3/8") cutting depth - provides sufficient depth for drilling through most standard tile and stone thicknesses in a single pass.
- Diamond abrasive cutting material - delivers fast, controlled cutting through hard, abrasive materials that would quickly wear out standard bi-metal or carbide hole saws.
Why This Product
- Dry cutting with built-in thermal management - the cooling wax fill addresses the primary challenge of dry diamond drilling: heat buildup. This means no water supply is needed on the job site, without sacrificing blade longevity.
- Right-size diameter for precision work - at just 5/16", this hole saw is ideal for creating small, clean penetrations in hard tile and stone for screws, anchors, or fixtures where larger cuts would crack the material.
- Direct angle grinder compatibility - the 5/8"-11UNC thread is the standard angle grinder spindle size, so this tool mounts to a tool most installers already own, with no special adapter or chuck required.
- Suited for the hardest tile and stone materials - diamond abrasive cutting is the appropriate technology for granite, marble, ceramic, gres, and engineered stones that resist conventional hole saws, reducing the risk of cracking or chipping.
Specifications
- Manufacturer Part Number: 552-708
- Brand: CMT Orange Tools
- Diameter: 5/16"
- Cutting Depth: 35mm
- Cutting Height: 1 3/8"
- Total Length: 2 3/8"
- Shank: 5/8"-11UNC
- Maximum RPM: 14,000
- Rotation: Right Hand (RH)
- Blade Material: Diamond (DP)
Approved Applications
- Drilling hard tiles - ceramic and gres
- Drilling hard natural stones - granite and marble
- Drilling artificial stones and engineered stone surfaces
- Dry hole sawing with an angle grinder
Frequently Asked Questions
Does this hole saw require water cooling during use?
No. This is a dry hole saw designed for dry cutting. It is filled with cooling wax that melts during drilling to manage heat at the cutting surface, eliminating the need for a water supply during operation.
What type of angle grinder spindle does this hole saw fit?
This hole saw uses a 5/8"-11UNC threaded shank, which is the standard spindle thread found on most common angle grinders. It mounts directly without requiring an adapter.
What is the maximum safe operating speed for this hole saw?
The maximum rated speed is 14,000 RPM. Always verify that your angle grinder's no-load speed does not exceed this rating before use to ensure safe operation.
Can this hole saw cut through granite or marble?
Yes. This diamond dry hole saw is specifically designed for hard stones including granite and marble, as well as hard tiles such as ceramic and gres, and artificial or engineered stone materials. The diamond abrasive cutting surface is suited for these dense, hard materials where standard hole saws would not perform adequately.
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