Diamond Crown Hex Drill Bit 20 mm, MILWAUKEE

MILWAUKEE Diamond Crown Hex 20 mm is a hex-shank diamond core drill bit engineered to cut precise 20 mm diameter holes in hard surfaces. The bit uses a diamond cutting edge to abrade and remove material efficiently from tile, ceramic and natural or engineered stone. With a hexagonal shank for secure engagement in hex chucks and quick-change adapters, this drill bit is intended for use with compatible rotary drills and drill drivers commonly used in plumbing, tiling and renovation work.

Advantages

The diamond cutting edge provides high wear resistance and consistent cutting performance on hard materials, reducing the need for frequent replacement. The hex shank ensures stable chuck retention and faster bit changes when used with hex-compatible drill chucks or adapters. The 20 mm diameter core produces clean, accurately sized holes suitable for fittings and fixtures, while the core design helps extract debris and limits heating during use.

Suitable for

• Drilling holes in ceramic and porcelain tiles
• Creating openings in natural stone and engineered stone surfaces
• Plumbing installations requiring precise 20 mm holes
• Renovation and repair tasks involving tile or stone

Key specifications

• Cutting diameter: 20 mm
• Shank type: Hexagonal shank for hex chucks
• Cutting material: Diamond abrasive edge
• Intended materials: Tile, ceramic, stone
• Application: Core/drill bit for rotary drilling

How to use

Secure the Diamond Crown Hex 20 mm in a compatible rotary drill or drill driver with a hex chuck or suitable quick-change adapter. Mark the drilling location and, where possible, start with a low speed to position the bit accurately. Apply steady, moderate pressure and allow the diamond edge to cut without excessive force. Use water or periodic pauses to cool the bit and reduce dust when drilling dense or thick material. Remove the bit periodically to clear debris from the core and prevent clogging.

Usage recommendations

Use appropriate personal protective equipment including eye protection, gloves and respiratory protection when generating dust. For best results on ceramic and porcelain, begin drilling with a small pilot guide or tape to prevent slippage. Maintain moderate speed and cooling to prolong bit life; avoid hammer action or impact modes which can damage the diamond edge.