The larger the tiles the greater the risk of breakage when working the tiles.
Some dexterity is required and a good diamond wheel to achieve good results when grinding such tiles.
Here are some tips :
- Provide maximum support and a stable table that is at least the same size as the tile.
- Overhanging parts of the tile (which need to be sawed off) cause tension during grinding and risk of breakage.
- Place 2 rigid pur sheets or insulation boards under the tile so it is fully supported and does not need to be fixed or held back.
- Do not sit with the knee on the tile or exert excessive pressure on it during the grinding process
- Important is not to want to grind too fast
- 2 min for 1 length of 60 cm is not abnormal -> 4 min for 120 cm is not abnormal
- at the last 15cm come up with the grinder and grind a shallow slot (2-3mm) to 5cm before the end of the tile
- the last 5 cm will be completely cut through again.
- the 2 previous points should be done without stopping
- now carefully cut the shallow slot
A good grinding wheel we find one with such profiling :
For drilling holes :
Very obvious, yet incredibly important to mention here, is the working speed.
Before using a diamond drill, find out what the recommended speed is! And check that your drill or angle grinder meets these requirements. Working both above and below the recommended speed is negative for the efficiency and life of your drill.
When dry drilling into tiles, use a drill guide with dust disposal whenever possible.
During drilling, the diamond drill must be continuously cooled, either with water or air.
Overheating is disastrous for the drill. Wet drills require a constant water supply.
Do not apply too much pressure, or the water cooling will no longer work optimally. Be sure to use a drill guide to prevent the drill from "walking.
Wet drilling is the cheapest and gives the best results, but sometimes speed is important or materials may not get wet.
Then drill dry, but take measures to work dust-free such as using adrill guide with dust removal.
When dry drilling, make sure that air continues to circulate through the inside of the auger; the slots in the side of the auger also serve this purpose.
You do this by holding the dry auger at a slight angle and by releasing it regularly.
TOP: All the diamonds from the dry drill hit the tile at once. UNDER: A pendulum motion prevents the drill from burning.
IMPORTANT: a pendulum movement
Not all the diamonds from the dry drill may hit the tile at once.
So don't put the drill bit flat on the tile, but hold the drill bit at an angle and make a pendulum/swinging motion all the time.
As a result, only a portion of the drill bit is always in contact with the tile. This prevents the drill from burning.
OTHER IMPORTANT ASPECTS IN THE USE OF DIAMOND DRILLS
The drilling depth directly affects the efficiency of the drill, but again, cooling is essential.
The deeper you need to drill, the more cooling you need to have. Otherwise, the returns drop tremendously.
Withdry drilling from 6 to 14 mm(commonly used to drill holes in tiles for hanging bathroom accessories) you will drill an average of 15 to 25 holes, depending on the diameter of the drill bit, the type of material, its thickness, the degree of cooling and how you drill. You can extend the lifespan yourself by stopping at about 70-75% of the tile thickness. Then remove the drill residue in the tile and continue drilling to depth with a concrete drill bit(s). This also saves time!
ALWAYS CLEAN DRILLS
Always remove all drill residue from the drill. This is because the coolant (water or air) must be able to circulate freely in the drill to ensure that the temperature does not rise too high.
When using dry drill bits in glazed wall tiles, it can happen that the drill bits glaze through - the heat causes some of the glaze to melt on the drill bit - so that not all the diamond can reach the surface. As a result, the drill no longer works as it should. Then remove the glaze with a wire brush or by gently tapping.
DO NOT FORCE
Last but not least. Diamond tools work by friction. Therefore, you have to let the drill and the power of the drill do their job. If you force the drill, it actually becomes less effective and also does not last as long. Electric drills should always be used without a knock function.