The core drill is the drill bit to use when you need to cut a large diameter hole through a solid brick or block wall. Once rotating, these teeth bite into the surface you’re working on and cut their way through creating the required hole. Machine Mart Limited is authorised and regulated by the Financial Conduct Authority, register number 703528 and acts as a credit broker and not a lender. As a very general rule of thumb, the larger the hole you are drilling and the denser the material you are drilling through, the slower the speed you should drill at. There are many core drill sizes and generally each size is manufactured to represent the size of a commonly used pipe, cable or duct so that once the hole is drilled, the object in question passes through with ease.

Individual Diamond Cores | Core Drill Bits | Screwfix Individual Diamond Cores | Core Drill Bits | Screwfix

Made from steel, the diamond core drill bit comes in many lengths and has various sized teeth depending on the material and cutting requirement. Pretty much all core bits don’t feature a shaft like a normal drill bit, the connection to the drill is made via an arbor. Diamond core drill sets are designed to remove the cut material in a cylinder shape leaving the perfect circle in the cut material.If however the depth of the hole is longer than the drill bit you will need to withdraw the core bit when you hit a depth of about 125-130mm and chop out the core with a hammer and bolster, or in some cases you can lever it out.

Core Drill Set | Core Drill Bit Sets | Screwfix Core Drill Set | Core Drill Bit Sets | Screwfix

If you don’t already have a suitable drill, any decent hire company will gladly supply not only the correct drill but also the correct diamond core bit, if purchasing either the drill or core bit is deemed too expensive. The drilling action needs to be as smooth as possible and the jerky action of the hammer can snap expensive diamond teeth very easily. There are a few different types of core bit and the best one to use will very much depend on the size and depth of hole you’re drilling and the type of material you are drilling through. Necessary cookies are required to enable the basic features of this site, such as providing secure log-in or adjusting your consent preferences. For the neatest cut and finish to your hole it is advisable to then finish the hole from the other side.With the above in mind, dry cutting diamond core bits are generally used when working indoors, whereas wet cutting bits are used externally.

52 mm Core Drill Bits | Drilling | Screwfix 52 mm Core Drill Bits | Drilling | Screwfix

Suitable for wet and dry drilling into most construction material like stone, brick, concrete and masonry. To do this they should be used in short bursts and the whole bit should be regularly withdrawn from the hole and exposed to the air to disperse any heat.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 in any doubt always refer to the manufacturers instructions for your particular power drill and also for the core bit you are using.