Diamond Core Drill Bit for Porcelain Stoneware 55 mm M14, Keltin

Keltin diamond core drill bit for porcelain stoneware with a 55 mm cutting diameter and M14 thread is designed for creating precise circular holes in hard ceramic and gres tiles. Supplied in a pack of 50, this core bit is intended for professional and trade use where multiple clean penetrations through porcelain stoneware are required. It fits M14-threaded angle grinders and compatible drilling machines, enabling faster work on plumbing, electrical and tile installation tasks.

Advantages

The diamond-segmented cutting edge provides efficient material removal and extended life when working with dense porcelain stoneware. A 55 mm diameter offers a standardized hole size suitable for many fixtures and fittings, while the M14 thread ensures secure and direct mounting to common angle grinders and adapters. Delivered in a bulk pack of 50, the set reduces downtime and keeps replacements readily available on-site.

Suitable for

• Drilling clean circular holes in porcelain stoneware (gres) and hard ceramic tiles
• Creating openings for plumbing and pipe installations
• Cutouts for electrical boxes, conduit and cable penetrations in tiled surfaces
• Repeated professional use on renovation and installation projects

Key specifications

• Cutting diameter: 55 mm
• Thread type: M14
• Intended material: porcelain stoneware (gres) and hard ceramic tiles
• Segment type: diamond abrasive cutting edge
• Pack quantity: 50 pieces

How to use

Mark the center point of the desired hole on the tile and secure the workpiece to prevent movement. Attach the diamond core drill bit to an M14-threaded angle grinder or a compatible drilling machine, ensuring a firm connection. Begin drilling at low speed with light pressure to establish the initial cut, then increase speed moderately while maintaining steady coolant or water feed to reduce heat and extend bit life. Withdraw occasionally to clear debris and prevent clogging; finish the hole with controlled, even pressure to avoid chipping the tile surface.

Usage recommendations

Use continuous water cooling or a dedicated wet drilling setup when working with porcelain stoneware to minimize heat buildup and prolong diamond segment life. Wear appropriate personal protective equipment including safety glasses, gloves and a dust mask. For best results on very hard or glazed surfaces, start with a pilot guide or use a drill guide to ensure perpendicular alignment and reduce the risk of chipping.