BORDO Diamond Mist Drill Set Features:

• Bordo's range of diamond drills are ideally suited to cutting ceramics, porcelain tiles and stone.
• They produce no-crack, burr-free holes with minimum spalling.
• The interchangeable cutters result in a lower cost per hole than some other diamond drill solutions.
• Rotary only action ensures low noise and vibration.

Diamond mist drills are designed to deliver the correct amount of lubrication to maximise drill life and optimise drilling performance. The life of any type of diamond drill depends upon the hardness, abrasiveness and thickness of the material being drilled and the specific drilling techniques used (drill speed, pressure and lubrication). Using diamond drills in hard materials is not difficult, however drilling the hole takes time. You should consider that they aren't "drilling" a hole - they are "grinding" a hole. As the diameter of the cutter increases the optimum rotation speed decreases.

Cutter size 5.0 to 10.0mm Rotation Speed 15000 to 3000 RPM; Cutter size 11.0 to 24.0mm Rotation Speed 7000 to 1500 RPM.