1 1/8 Diamond Hole Saw Bits

Yes, wet cutting is strongly recommended when using diamond hole saw bits on tile and stone. Water acts as a coolant, preventing the diamond segments from overheating, which extends bit life significantly and produces cleaner cuts. Some bits support dry cutting, but wet use is always preferred for best results.

For a 1 1/8" diamond hole saw bit, a low to moderate drill speed is recommended — typically between 600 and 900 RPM. Slower speeds reduce heat buildup and minimize the risk of cracking the tile. Applying steady, even pressure while keeping the bit cool with water will ensure optimal performance.

These bits are compatible with most standard corded or cordless drills equipped with a suitable chuck size. For best control, a variable-speed drill is recommended. Ensure the drill can maintain consistent low-to-moderate RPM under load. Angle grinders are not suitable — always use a drill for hole saw applications.

To start cleanly, apply masking tape over the drill area to reduce surface chipping and help guide the bit. Begin drilling at a slight angle to score the surface, then gradually bring the bit to a vertical position. Use light, consistent pressure and keep water flowing to prevent overheating and cracking.

The lifespan of a 1 1/8" diamond hole saw bit depends on material hardness, drilling technique, and whether wet cutting is used. Under proper conditions with consistent water cooling, a quality diamond hole saw bit can complete dozens of cuts. Cutting harder materials like porcelain and granite will reduce longevity compared to softer ceramics.

A 1 1/8" diamond hole saw bit creates a hole with a finished diameter of approximately 1 1/8 inches (roughly 28.6 mm). This size is commonly used for plumbing pipe pass-throughs, shower fixture installations, and electrical conduit access points in tiled walls, floors, and countertops.