FeaturesThe DRYGRES PREMIUM range of diamond drill bits is perfect for drilling all types of tiles, especially porcelain stoneware, and other stony materials such as marble and granite.RUBI has used VACUUM BRAZED vacuum soldering technology in the DRYGRES PREMIUM range of drills, which withstands higher temperatures due to friction. This results in a longer life of the diamond drills.DRYGRES PREMIUM diamond drill bits, with diameters Ø 6 to 12 mm, are perfect for fixing bathroom accessories or any type of decorative accessory on tiled surfaces. The other diameters of the DRYGRES PREMIUM diamond drill bit range, from Ø 20 to 85 mm, are primarily designed to offer tilers the best results when drilling sockets, pipes, drains, lighting, etc.DRYGRES PREMIUM diamond drill bits are dry ground and can be used directly on an angle grinder thanks to their M14 thread connection or, via an adapter (ref. 05976), on a drill - without impact function.The average lifespan of the DRYGRES PREMIUM diamond drill bits varies depending on the diameter: those from Ø 6 to 12 mm have an average lifespan of 60 holes and for drills from Ø 20 to 85 mm, this is 150 holes.The average lifespan of the drills ALWAYS depends on the type of material, its thickness and proper cooling and use.The drilling depth of the DRYGRES PREMIUM diamond drill bits is 30 mm for drills from Ø 6 to 35 mm and 38 mm for drills from Ø 43 to 85 mm.In diameters Ø 6, 8, 10 and 12 mm, the PREMIUM DRYGRES contain wax internally. This wax melts during use of the drill and facilitates cooling and evacuation of drilling debris (If the wax runs out, the drill can simply continue to be used. Only the total loss of the diamond indicates the end of the drill's life).The DRYGRES PREMIUM diamond drill bits (diameters Ø 20 to 85 mm) have a lateral opening that improves the cooling of the drill and makes it easier for us to remove the core after each drill hole. Before drilling a new hole, we must ensure that the drill is clean. Drills from Ø 43 mm are segmented to improve stability during drilling.The maximum operating speed for DRYGRES PREMIUM diamond drill bits is 14,000 rpm.For a better finish and a longer drill life, it is important to respect the correct speed and to make a slight oscillating movement during drilling.