This diamond coated core drill bit removes a complete circle from glass, tiles, marble, granite, ceramic or other materials and only needs
If you smell burning, back off! Either your speed is too high or the pressure you’re applying is too much. You’re drill bit should never be hot to the touch, not even warm.
Please: Always use water for lubrication., otherwise the diamond core drill will burn.Can be used with a standard electric drill.
Start your hole diagonally, make a round trace and then hold drill straight.
Reduced drill speeds, low drill pressure and increased use of water lubrication will extend drill bit life considerably.Use Coolant.Minimum pressure.The general rule is the smaller the diameter of your drill bit, the faster drill speed you can use. The harder your material, the slower drill speed you should use.
specification: 1*4mm, 1*5mm, 1*6mm, 1*8mm, 1*10mm, 1*14mm, 1*16mm, 1*18mm, 1*22mm, 1*35mm, 1840mm, 1*50mm
1set x Diamond bit set