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ø14mm Diamond core bit. Application: The diamond core bit is used to drill holes in: Ceramic tiles. Marble. Grade 5 porcelain (hardest). Granite. Glass. Slate. The diamond core cuts faster, smoother and lasts longer than any other core. drills. How to use the diamond core bit: The diamond core drill bit must be used with water at all times when. drilling. The water serves as a coolant to prevent the diamonds from. overheating. The maximum allowable temperature for a diamond core bit is 500°C. There is no pilot drill with the diamond core bit. A low rpm rotary drill. with a planetary gearbox is required to be used with a diamond core bit. It is. possible to use a cordless drill, but in the lowest gear setting. No hammer. action is used. Tightly fasten the diamond core bit in the drill's chuck. Keep the bit steady at a 45° angle. with the starting point on the edge of the assigned area to be. drilled whilst the bit is rotating. A notch will be made (this is normal). Gradually move the drill from 45° to 90° and continue drilling until. finished. Allow the diamond core bit to cool down completely before proceeding to. drill another hole. Water can be applied by: spraying water on the surface,. using a wet sponge,. attaching a water feed device. This is necessary when drilling into a. wall tile. Please have a look at the video in the tabs above. showing how to use the diamond core bit. An indication of the correct spindle speed: DIAMOND CORE BIT DIAMETER. SPINDLE SPEED. ø5.0mm. 800 rpm. ø6.0mm. 600 rpm. ø7.0mm. 500 rpm. ø8.0mm. 500 rpm. ø10.0mm. 400 rpm. More than ø10.0mm (>10.0mm). less than 400 rpm. . IMPORTANT: The tool life will mostly depend on the proper usage and the hardness of the items. drilled into. It is normal for a diamond core bit to last up to 10 or more. drilled holes in hard tiles. Please remember to always use. water when drilling with diamond core bits. .
