8 inch Max Drilling Diameter: Our core drilling machine generates extreme power because of its 3980W copper motor. Maximum Speed: 750RPM. Maximum Coring Diameter: 8"/205 mm. More importantly, the 4.25"/108 mm core bit in the picture is included.
Durable Construction: As the machine will work upside down, so water would unavoidable flow on to the drill machine. In this case, our drilling rig has a rustproof steel forged output shaft and waterproof copper water inlet for a long-lasting water supply.
Thoughtful Security Design: We also provide overload protection system and an upgraded cooling system. They are designed for avoiding burn-in and prolonging the service lifespan of the drilling press machine.