This versatile stand-up core drilling machine offers both wet and dry drilling modes, providing flexibility for a variety of applications. With a 9-inch (23 cm) diameter hole capacity, it ensures precision when boring through different surfaces. Equipped with a robust 3200W motor and a high-speed 750RPM gearbox, this core drill delivers exceptional drilling power. The variable speed control allows operators to adjust the speed based on the material being drilled. Features external and internal thread output arbor sizes (1-1/4" x 7 UNC and 5/8" x 11 UNC) for compatibility with a wide range of core bits. Designed with operator safety in mind, this core drill features a secure clutch and an overload protection device. The concrete core drill is built to withstand heavy use, with a rustproof, steel-forged output shaft that can handle higher pressure. An upgraded one-touch water pipe connector ensures a consistent water supply, while a thickened guide rail reduces machine vibrations for smoother operation. Perfect for drilling into reinforced concrete, red brick, marble, and other tough materials, this core drill is ideal for professional-grade projects.