Porcelain Tile / September 14, 2018 / Brousseau
There can be many quality issues regarding porcelain tiles that are sold at home improvement stores and discount tile stores. Many times these tiles are cheap imports that are vastly inferior with many quality control issues. Unwitting people thinking they are purchasing quality tiles that are superior to ceramic when in fact they are extremely cheap. These cheap tiles can present many problems in quality durability and they can be extremely difficult to clean and maintain.
Now that the pilot hole has been cut it is possible to drill the main (large) hole. Attach the appropriate diamond core and ensure that there is a constant supply of cold water (see water cooling information in the previous sections of this article). Diamond cores that are larger than 13mm will require an adapter with pilot pin that locates into the pilot hole that has been cut previously to ensure the perfect hole will be made. Starting the drill vertically begin to drill in a circular motion with sufficient pressure until the tone of the drill changes.
These methods will not keep the drill bits cool enough and will drastically shorten the life of the drill bit. Ensure that the drill is in normal mode and set the drill to between 1000 and 1500 rpm. If you have marked the tile with a marker it is best to drill into the tile using a method called leaning in. Leaning in ensures that the drill will not slip and wander off center as you begin to drill into the tile.