Diamond drill bit for porcelain stoneware GRAPHITE 12 mm (57H284)

Diamond drill bit for porcelain stoneware GRAPHITE 12 mm (57H284) is a specialist wet-drilling tool designed for making precise circular holes in hard ceramic and porcelain tiles, gres and similar dense surfaces. The bit features a diamond-coated cutting edge that increases durability and reduces chipping during drilling. It is intended for use with water-cooling to maintain cutting performance and extend tool life when working on tile surfaces, glass and natural stone.

Advantages

The diamond-coated tip provides stable cutting and long service life when drilling hard glazed tiles and porcelain stoneware. Wet-drilling design helps control heat and dust, preserving the diamond segment and the tile surface. The 12 mm diameter yields standard-size holes suitable for common installation tasks while keeping drilling vibrations and micro-fractures to a minimum. The bit is compatible with standard rotary drills and drill stands when used with appropriate water feed.

Suitable for

• Drilling holes for plumbing fixtures through porcelain and gres tiles
• Making electrical passthroughs for sockets and conduits in tiled walls
• Tile installation and renovation work where precise, clean holes are required
• Wet drilling tasks on ceramic, glazed tiles, glass and some types of natural stone

Key specifications

• Diameter: 12 mm
• Cutting edge: diamond-coated segment for hard surfaces
• Intended drilling method: wet drilling with continuous water cooling
• Suitable materials: porcelain stoneware (gres), ceramic, glazed tiles, glass, natural stone
• Compatibility: standard rotary drills and drill stands when used with water feed

How to use

Secure the workpiece and mark the drilling point. Use a drill with a steady speed and, where possible, a drill stand to keep the bit perpendicular to the surface. Begin drilling at low speed to establish the hole, then apply gentle, consistent pressure while supplying water to the cutting edge to cool and lubricate. Maintain continuous water flow to remove debris and prevent overheating of the diamond segment. After completing the hole, clean the bit and tile surface and allow to dry.

Usage recommendations

Use a constant water supply and moderate drilling speed; avoid excessive pressure or high speed which can damage the diamond coating or cause tile cracking. For best results on large-format tiles, fix the tile securely and consider using a backing support to prevent blowout on the rear face. Wear appropriate eye protection and follow general safety guidelines for power tool operation.