Spero 77mm Premium Thick Wall Diamond Core Drill Bit

The SPERO SP77UNC is a diamond core drill with a diameter of 77 mm, designed for professional drilling in concrete and natural stone. This high-quality diamond drilling tool features a thick wall construction and has a 1-1/4 UNC internal thread connection with an overall length of 400 mm. The steel pipe construction, with a wall thickness of 2 mm, ensures increased durability. The diamond segments have a height of 9 mm and a thickness of 3.5 mm, designed for full use up to the pipe surface, providing maximum value. This core drill is intended for wet drilling and requires a compatible diamond drilling machine with a slip clutch and water supply system. The tool demonstrates effective performance on various building materials such as concrete, reinforced concrete, natural stone, and masonry. The diamond segments possess self-sharpening properties during normal drilling in suitable materials; however, for extremely hard substrates, periodic sharpening with a sharpening stone is recommended to prevent segment smoothing. The 1-1/4 UNC internal thread connection ensures compatibility with standard diamond drilling equipment, while the 77 mm diameter offers optimal performance for precise openings for plumbing installations, electrical conduits, and ventilation systems. The thick-walled construction provides improved stability and reduced vibrations during operation, resulting in cleaner holes and longer tool life. This professional diamond core drill is manufactured to meet the demands of construction, renovation, and installation applications where precise drilling in challenging materials is required.