Diamond core drill bit 100 mm GRAPHITE 57H300 for porcelain

The Diamond core drill bit 100 mm GRAPHITE 57H300 for porcelain is a hollow diamond-segmented cutting tool intended for drilling precise circular holes in porcelain and other hard ceramic materials. The 100 mm cutting diameter and core design allow efficient removal of material while maintaining hole roundness. The bit is designed for use with compatible rotary tools and drill presses when installing plumbing fixtures, electrical boxes, pipe penetrations and tile fittings in ceramic surfaces.

Advantages

The diamond segments provide high abrasion resistance for consistent cutting performance in dense ceramics. The hollow core reduces friction and material build-up inside the hole, improving cooling and chip evacuation during continuous drilling. Its standard 100 mm diameter delivers a clean, accurately sized opening for fittings and fixtures, and compatibility with common rotary and drill press setups ensures versatile use on-site or in a workshop.

Suitable for

• Drilling holes in porcelain tiles and glazed ceramic panels
• Creating openings for plumbing fixtures and pipe penetrations
• Cutting precise circles for electrical boxes or mounting hardware in tiled surfaces
• Workshop use with drill press or on-site tile installations with rotary tools

Key specifications

• Cutting diameter: 100 mm
• Design: hollow core with diamond segments
• Intended material: porcelain and hard ceramics
• Typical mounting: compatible with standard rotary and drill press tool holders

How to use

Mark the center of the hole on the ceramic surface and secure the workpiece or tile to prevent movement. Fit the core drill into a suitable rotary tool or drill press and set a controlled, moderate rotational speed; avoid excessive speed that may overheat the diamond segments. Use steady, moderate pressure and keep the drill perpendicular to the surface. Apply water cooling or periodic water application to the cutting area to reduce heat and prolong bit life. Withdraw the bit occasionally to remove debris and allow cooling, then continue until the hole is complete.

Usage recommendations

For clean, long-lasting results, use continuous water cooling and avoid heavy axial force. When drilling large-diameter holes in porcelain, start with a light pilot contact and increase pressure gradually. Inspect the bit for wear before each job and replace it if diamond segments show significant loss to maintain hole quality.