|
The Bosch bits are perfect for what you want to do. The reason a tile cracks is from pressure. Cracks usually occur in the beginning or at the very end. In the beginning when you apply heavy pressure to break through the outer glaze. At the end when the bit starts to go through it may twist or catch a fragment.
To prevent cracking in the beginning. Mark your holes. Take the bit before chucking in it the drill. Place it at your mark and tap it very gently until you see the glaze crack. You don't need to go all the way through the glaze just crack the surface. Do this with all the marks.
Chuck the bit and let the bit do the work. Slow speed light pressure. Hold the drill straight. When you feel it break through the back go even slower. It doesn't hurt to back the bit out at this point and check things out.
|