Diamond drill bit for porcelain stoneware GRAPHITE 38 mm 57H290

Diamond drill bit for porcelain stoneware GRAPHITE 38 mm 57H290 is a tool designed for drilling precise circular holes in hard ceramics and porcelain stoneware. The bit is suitable for both dry and wet drilling methods and is intended for use with rotary drills and drill stands when creating openings for pipes, fixtures or cable passages in tiles and slabs. Its diamond cutting edge ensures efficient material removal and maintains shape during repetitive use.

Advantages

The diamond cutting crown provides long-lasting edge retention and consistent hole quality in dense porcelain and gres. Its diameter and construction enable stable guidance in drill stands and hand-held rotary drills, reducing wobble and improving accuracy. Compatibility with wet and dry drilling expands versatility on different job sites and helps adapt to work conditions without compromising cutting performance.

Suitable for

• Creating holes for plumbing and heating pipe installations in porcelain tiles and slabs
• Installing electrical boxes, conduits or cable passages through ceramic surfaces
• Cutting precise openings for fixtures such as faucets and shower fittings
• Working with both hand-held rotary drills and drill press stands for accurate, circular holes

Key specifications

• Diameter: 38 mm
• Cutting material: diamond grit crown for hard ceramics
• Designed application: porcelain stoneware (gres) and hard ceramic tiles
• Drilling modes: suitable for dry and wet drilling
• Compatible tools: rotary drills and drill stands

How to use

Mark the drilling point on the tile and secure the workpiece to prevent movement. If using a drill stand, align the bit and set the speed according to the drill manufacturer’s guidelines. For hand-held drilling, start at low speed to establish the hole and increase cautiously; apply light, steady pressure without forcing the bit. For wet drilling, supply a consistent flow of water to the cutting area to cool the diamond crown and remove debris. For dry drilling, use intermittent drilling with pauses to avoid overheating.

Usage recommendations

Use appropriate personal protective equipment (safety glasses, gloves and hearing protection). When possible, prefer wet drilling to extend bit life and improve dust control. Match drill speed and feed pressure to the hardness of the material and consult the tool manufacturer’s instructions for optimal performance.