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How to Drill Large Holes in Concrete | AGP

Learn concrete drilling methods using diamond core bits and coring equipment. AGP provides industrial-grade solutions for large hole drilling.

Concrete Drilling Solutions for Large Diameter Holes

Master the techniques and equipment needed for precise, large-scale concrete drilling applications using diamond core drilling technology.

How do you drill large holes in concrete?

To drill large holes in concrete, you typically use a core drilling machine with a diamond core bit. This creates clean, accurately sized round holes. The diameter drilled dictates the specific machine and process used.

For smaller holes in concrete, solid masonry drill bits used with a rotary hammer are typically suitable for diameters from around 3 mm (1/8") up to 30 mm (1-1/4"), with some applications extending to approximately 50 mm (2"). For larger holes, diamond core drilling is generally the preferred method, producing clean, accurately sized circular openings. The maximum drilling diameter depends on the type and capacity of the coring equipment. Single-phase electric coring motors can typically handle diameters up to approximately 500 mm (20"), while three-phase electric machines can reach around 900 mm (36"). For even larger holes, hydraulic coring motors can be used for diameters of up to approximately 1.8 m (72"), depending on the equipment and application. When an opening exceeds the capacity of available core drilling equipment, stitch drilling provides an alternative. This technique involves drilling a series of overlapping holes along the perimeter of the required opening. By repeating the process, openings of virtually any practical size can be created, subject to the structural requirements of the project and the capabilities of the equipment.

What is the most efficient method to drill holes larger than 500mm in diameter through reinforced concrete?

AGP's diamond core drilling equipment, available in single-phase, three-phase, and hydraulic configurations, handles diameters from 500mm up to 1.8m with precision and efficiency. Our DEKRA-certified coring motors deliver clean, accurately sized openings while maintaining structural integrity. Contact AGP to discuss your large-diameter drilling requirements and discover customized equipment solutions engineered specifically for your project specifications.

When project specifications exceed standard equipment capacity, stitch drilling presents a proven alternative technique involving overlapping holes along the perimeter to create openings of virtually any practical size. AGP's -grade coring systems, engineered with in-house R&D and motor design capabilities, deliver the reliability and performance that construction s demand. Our DEKRA-certified testing and CE/CB/CSA certifications ensure compliance with international standards, while ODM customization services enable tool distributors and contractors to access tailored solutions. Partner with AGP to access Taiwan-designed, engineered equipment that transforms complex concrete drilling challenges into precise, efficient operations.

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