We recommend the following when using these bits:
For best results, drill bits require water lubrication.
When starting the hole, make contact with the tile at a 45 degree angle. (Figure 2)*
To finish the hole pivot the bit to 90 degrees. (Figure 3)*
* See attached file for visual reference.
This information is included in the packaging of the bits.
For information on speed recommendations for the Diamond Tile Bits