MTools MTDBIT.12 Specialty Woodworking Bits  (Pack of 1)

These bits are sold individually and are designed to cut through hard materials like porcelain, marble, granite, etc. They must be used with water. Drilling through ceramic tiles will damage these bits. The M-Tools Diamond Drill Bit will drill between 10 and 20 holes if used correctly. A guide must be used to keep the bit from wandering How to use the diamond drill 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 drill bit is 500°C. There is no pilot drill with the diamond drill 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 drill 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 drill 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.