Whenever you have to drill a hole in brickwork or concrete, whether it’s for a fixing or for a pipe/cable to pass through, once you have marked the centre of the hole start drilling using a good quality masonry bit with the hammer or SDS action switched off so the drill bit creates an indentation.
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Then you can continue drilling the hole with the hammer or SDS switched back on without the drill bit sliding all over the wall and removing your centre mark.
If the hole you are drilling is larger than 8mm I would start off with smaller drill bits and increase the size, re-drilling the hole each time until you reach the required diameter. Aside reducing the effort needed to drill, this method reduces wear on your drill bits.
Drilling Through a Tile
Should you need to drill a hole in a wall tile, stick masking tape approximately where the hole will be and mark the centre on it. Again turn off the hammer/SDS action and try to drill through the tile without it. The masking tape should stop the drill bit from sliding all over the place and you have less chance of breaking the tile drilling with the hammer/SDS action switched off.
When the drill bit has passed through the tile (6-8mm) you can, if required, switch the hammer/SDS action back on.
Video – How to Drill a Tile
Video Credit: The Guardian
PRO TIP! – To reduce the mess from your hole drilling, have an assistant hold a vacuum cleaner hose under the hole when it is being drilled, it will remove virtually all the dust.