Amtech F1210 50mm (2") Core drill

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At this point you will only have around half an inch or so to drill through so take your time and once done you will be left with a nice neat and clean hole. If the surface of the cutting teeth are subjected to too much heat the metal encasing them melts covering the diamonds and reducing cutting efficiency.

core bits - Hilti GB Diamond core bits - Hilti GB

If you keep forcing the core cutter through, when you actually break through you will force a large amount masonry away from the outside of the hole, making a total mess of it all. For the neatest cut and finish to your hole it is advisable to then finish the hole from the other side.You will also learn about the different types of core drill bit and also how to keep your drill straight and level. Most domestic use diamond core cutters will always have a removable guiding drill bit which acts as a pilot hole to guide the core drill. Drilling a 6mm hole in the wrong place can easily be rectified, but trying to fill in a 4 inch hole is not an easy job at all.

Core Drill Bits Sets | Diamond Tools | Sydney Tools Diamond Core Drill Bits Sets | Diamond Tools | Sydney Tools

As they are not of a particular high quality, carbide core drills are generally only really any good for drilling through softer concrete blocks. Finally, set the correct speed of your drill for the size of bit your are using and material you are drilling into and also check that the drills hammer action is turned off.However, leaving it in will allow you to see when it is about to break through the opposing side of the wall you’re drilling through.