Diamond Core Bit for Porcelain Gres 20 mm, Keltin, M14 Thread

Keltin Diamond Core Bit for Porcelain Gres 20 mm with an M14 threaded shank is engineered for creating precise round holes in hard ceramic and porcelain tile surfaces. The 20 mm cutting diameter and diamond-segment edge allow controlled drilling for installations such as plumbing fittings, electrical boxes or fixing anchors. The M14 thread ensures compatibility with angle grinders and rotary tools that accept M14 accessories; the bit is suitable for both dry and wet drilling methods when used according to tool and tile manufacturer guidance.

Advantages

The diamond cutting edge offers high hardness and consistent cutting performance on dense porcelain gres, reducing chipping and ensuring a smooth hole perimeter. The 20 mm diameter provides a common size for pipes and fixtures while the M14 shank delivers secure attachment to compatible power tools. The design allows both wet and dry use, giving flexibility depending on jobsite conditions and available equipment.

Suitable for

• Drilling holes for plumbing pipes and fittings through porcelain and ceramic tiles
• Creating openings for electrical conduit boxes and sockets in tiled surfaces
• Making anchor and fastening holes for fixtures on porcelain gres
• On-site renovation and installation work where angle grinders or rotary drills with M14 thread are used

Key specifications

• Cutting diameter: 20 mm
• Shank type: threaded M14
• Cutting material: industrial diamond segments
• Suitable drilling modes: dry and wet drilling (depending on conditions)
• Application material: porcelain gres and hard ceramic tiles

How to use

Secure the diamond core bit into an angle grinder or rotary drill that accepts an M14 threaded accessory. When drilling, mark the hole location and start at low speed to establish the cutting edge without slipping. For dry drilling, use short drilling intervals and allow the bit to cool between passes to prevent overheating. For wet drilling, supply a steady water feed to the cutting area to reduce dust and extend bit life. Maintain steady, moderate pressure—avoid forcing the bit—to achieve a clean, accurate hole.

Usage recommendations

Wear appropriate personal protective equipment such as safety glasses, hearing protection and a dust mask. Check the tool manufacturer’s instructions for compatibility and maximum RPM for M14 accessories. For best hole quality in very hard porcelain gres, prefer wet drilling and use a guide or pilot mark to prevent the bit from walking.