Even rock drilling in a simple fashion can be a difficult because rock is one of the toughest substances to do drilling in. It is also a very highly usable substance for a variety of different purposes. If you have some rock that you want to drill holes into you don't always have to hire a professional mason to get the job done for you. If you have all the right tools you can get this job done for a lot cheaper by doing it yourself.
Before you start your rock drilling make sure that you know exactly where you want to drill the holes or hole. Make sure to mark the spots or spot where you want the holes drilled by using a marking pencil. Make sure the marks are dark enough for you to see to help guide you while you are drilling.
Make sure you have a good cordless (preferably) hammer drill that has a fully charged battery. Don't use a battery that is not completely charged for the drill is going to need as much power as it can get when you are rock drilling. You can also use an electric hand held hammer drill and use an extension cord if you need more length to reach the location on the rock or if the rock you are drilling can't be moved.
Next you will need to put in a carbide or diamond tipped masonry drill bit into your drill. Do this by loosening the chuck of the drill and then insert the end of bit into the drill and tighten the chuck of the drill. Never use wood drill bit to drill into a rock this can result in breaking the bit and causing some serious injury to yourself if you do.
Once you have the bit in and you are ready for some rock drilling make sure to put the tip of the drill bit directly over the mark you made on the rock. Then lower the tip of the bit down slowly and make sure that you keep it aligned and straight. Next bring the bit down to the rock surface and keep the bit steady and vertical at all times.
Next you will want to apply pressure as you start to drill. Squeeze the trigger of your drill slow at first. You can then gain speed as you start applying more downward pressure to the rock. Let the tip of the drill bit slowly penetrate the surface of your rock. Then start applying more pressure and increase the speed of the drill. Make sure to keep the drill bit straight at all times and drill into your rock until you get the depth that you want.
Once you have reached the depth that you want back up the drill bit and slowly take it out of the rock. Once that is done you can move onto any other marks you have put on the rock and repeat the above steps until all of your holes are completed.
Note: Always make sure to wear eye protection when doing any kind of drilling but especially rock drilling.