Choose a diameter that gives the pipe or duct its specified clearance, including any sleeve or insulation. Check the actual outside dimension rather than relying on a nominal label.
Diamond Core Cutting for Masonry Openings
Core drilling creates large, controlled openings in brick, block or concrete for pipes, ducts and services. Select the core diameter and working length around the finished penetration and wall construction.
Confirm the core, arbor and machine fitting, plus whether the system is rated for dry or wet work. General drill bits cover smaller holes, while core equipment handles larger diameters.
Masonry drilling can release silica dust. Plan compatible dust suppression or extraction and suitable respiratory protection before starting.
Core Drilling FAQs
Only when the machine and core are approved for dry use and effective extraction is provided. Some systems require water cooling and suppression.
Normally not unless the core and machine instructions explicitly allow it. Percussion can damage many diamond cores and produce a rough opening.
Mark the centre, use the specified pilot system or guide and begin square to the surface. Avoid forcing the cutter before it has formed a stable track.
Assess the material and task, then use effective on-tool extraction or water suppression as appropriate. Silica-containing dust requires strict control and suitable RPE where the assessment identifies it.