Diamond Drill Bit RUBI 12 mm DRYGRES for dry drilling, model 05927

The RUBI 12 mm DRYGRES diamond drill bit (model 05927) is designed for dry drilling of hard ceramic materials such as gres and porcelain. It features a diamond cutting edge engineered to produce clean, precise holes with minimal chipping when used with an appropriate handheld or drill-press setup. The bit is intended for installation tasks that require accurate boreholes through tiles and similar surfaces for plumbing, electrical passthroughs and finish-work.

Advantages

The diamond tip provides consistent cutting performance and extended durability on hard ceramic surfaces. The 12 mm diameter offers a common bore size for pipe and conduit passthroughs, while the bit’s geometry reduces edge chipping and helps maintain hole roundness. Because it is optimized for dry drilling, the bit can be used without water cooling in circumstances where wet methods are impractical, simplifying on-site operation and cleanup.

Suitable for

• Drilling precise holes in gres, porcelain and hard ceramic tiles
• Creating passthroughs for plumbing pipes and fixtures
• Making openings for electrical conduits and junctions
• Tile installation and renovation where clean edges are required

Key specifications

• Cutting material: diamond tip suitable for hard ceramics
• Diameter: 12 mm
• Intended drilling method: dry drilling
• Suitable for: gres, porcelain, hard ceramic tiles
• Compatible with: handheld drills and drill presses when used with stable mounting

How to use

Mark the drilling position and secure the tile or workpiece to prevent movement. Start drilling at low speed to establish the hole and then increase rotational speed while maintaining steady, light pressure. Avoid excessive force and let the diamond edge cut the material; periodic short pauses help to reduce heat buildup. For handheld drilling, consider using a guide or jig to keep the bit perpendicular and prevent wandering. After completing the hole, clean any dust from the drilled area.

Usage recommendations

For best results, use the bit with controlled speed and minimal pressure; if prolonged drilling is required, allow short cooling pauses to extend tool life. When drilling porcelain or very dense gres, a drill guide or drill press increases accuracy and reduces the risk of breakage. Use appropriate personal protective equipment including safety glasses and a dust mask to protect from ceramic dust.