40mm Diamond Hole Saw for Glass & Ceramics

For a 40mm pipe, you typically need a hole saw slightly larger than the pipe's outer diameter — usually a 45mm to 50mm hole saw for standard pipe fitment with clearance. However, if you need a snug pass-through in tile or ceramic for a 40mm nominal pipe, a 40mm diamond hole saw may suit flush installations. Verify the pipe's exact outer diameter before selecting.

The 40mm diamond hole saw is designed to cut glass, ceramic tile, porcelain tile, and similar hard, brittle materials. It is suitable for creating precise circular openings for plumbing fixtures, electrical outlets, faucet installations, and decorative tile work in both residential and commercial environments.

Wet cutting is strongly recommended for diamond hole saws used on glass and ceramics. Continuous water flow cools the diamond segment, reduces friction, minimizes dust, and significantly extends the tool's lifespan. Dry cutting without proper cooling can overheat the bit, cause premature wear, and risk cracking the workpiece material.

Use a low drill speed — typically between 500 and 900 RPM — when operating a 40mm diamond hole saw on tile, glass, or ceramics. Lower speeds combined with water cooling prevent overheating and reduce the risk of chipping or cracking. Avoid high-speed settings, which generate excess heat and can damage both the bit and the material.

To prevent cracking, use a diamond hole saw rated for glass and ceramics, maintain consistent water cooling, apply steady light pressure without forcing the bit, and use a drilling guide or template to stabilize the tool. Begin drilling at a slight angle to establish a groove before drilling straight through the tile surface.

A diamond hole saw uses industrial diamond abrasive bonded to the cutting edge, making it suitable for hard, brittle materials like glass, porcelain, and ceramic tile. A standard bi-metal hole saw is designed for wood and soft metals and will quickly dull or fail on tile. Always use a diamond-tipped hole saw for clean, accurate results on hard surfaces.