Diamond Core Bit AWTools KORONA M14 14 mm — AWTools AW47284

The AWTools KORONA diamond core bit with M14 thread and a 14 mm cutting diameter is intended for drilling small, accurate holes in hard brittle materials. It is suitable for ceramic, porcelain, glass and various types of wall and floor tiles. The tool is built to be mounted on M14-threaded rotary tools or on standard drill adapters, offering stable engagement and controlled rotation for precise hole formation during installations, plumbing and electrical routing.

Advantages

The diamond-segment cutting edge provides increased wear resistance and consistent cutting performance when working with glazed and unglazed tile surfaces. The M14 thread ensures a secure connection to angle grinders and rotary tools, reducing slippage and vibration. Its compact 14 mm diameter enables precise small-diameter hole making without unnecessary material removal, which helps preserve surrounding tile integrity and finish.

Suitable for

• Drilling holes in ceramic and porcelain tiles
• Creating openings in glass and glazed surfaces
• Plumbing and fixture installations requiring small-diameter passages
• Electrical conduit and cable entry points in tiled walls
• Finishing work where clean, precise holes are required

Key specifications

• Cutting diameter: 14 mm
• Thread type: M14
• Cutting material: diamond segment edge
• Intended materials: ceramic, porcelain, glass, tiles
• Tool compatibility: M14-threaded rotary tools and adapters

How to use

Secure the diamond core bit in a compatible tool with M14 fitting or an appropriate adapter. Mark the drilling point on the tile and, when possible, start drilling at low speed to establish the position. Apply steady, moderate pressure and maintain consistent rotation; do not force the bit. Use water as a coolant and lubricant to reduce heat build-up and prolong cutting life, keeping the drilling area supplied with a steady flow or periodic wetting. Once the hole is complete, withdraw the bit slowly while the tool is still rotating to reduce chipping.

Usage recommendations

Use low to medium rotational speed with steady pressure and continuous cooling when drilling hard glazed surfaces. For best results, stabilize the workpiece and protect adjacent tiles with masking to prevent accidental damage.