Amtech F1210 50mm (2") Core drill

Product Information

In both cases, each set of instructions should state the correct drilling speed you should be using. If you're unsure of which drill is most suitable then feel free to speak with one of our online technicians now. If you are able to drill right the way through the wall in one go, the core drill will remove the core at exit.

Core Drill Hire - HSS Hire Diamond Core Drill Hire - HSS Hire

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. Made from steel, the diamond core drill bit comes in many lengths and has various sized teeth depending on the material and cutting requirement. 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. 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.

Using a core drill bit to drill out a hole for a soil pipe, extractor fan or waste pipe is a fairly easy task as long as you take your time and ensure the core bit and drill are both dead level. The arbor screws into the core bit at one end and the other end then slots into the chuck of the 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. You will also learn about the different types of core drill bit and also how to keep your drill straight and level. Before you start your drilling you should always make sure there are no cables or pipes hidden in the wall at the spot you intend to drill your hole.

Wood Drill Bits | Drilling | Screwfix Wood Drill Bits | Drilling | Screwfix

In general, a corded drill is the best to go for as it will produce power at a more constant rate, but if funds are available, the more expensive and higher quality cordless drills (minimum 24v) from brands such as DeWalt, Makita, Milwaukee etc should provide more than enough grunt. As they are not of a particular high quality, carbide core drills are generally only really any good for drilling through softer concrete blocks. 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.

As we are using an SDS drill, the chuck collar is pulled back and the shank is simply pushed into the chuck and the collar released to hold it firmly in place. 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.

core bits - Hilti GB Diamond core bits - Hilti GB

With the drill held straight and true, keep drilling, stopping regularly and withdrawing the bit from the hole to allow it to cool down. Trying to drill more dense objects such as solid concrete will in most cases cause the bit to heat up, wearing it out even faster.The drilling action needs to be as smooth as possible and the jerky action of the hammer can snap expensive diamond teeth very easily. As we have briefly touched on, a core drill is a drill bit which cuts large holes through masonry and concrete removing the centre part of the hole (core) as it drills and cuts its way through.