![]() The corded type is generally accepted as being able to give a higher torque for the same size of drill.ĭo you need to attend to some jobs which are located far from an electric outlet? This is where the cordless is supreme. The corded type needs to be connected to the electrical supply. ![]() These include whether the job area usually has electrical outlets. The next consideration could be whether it should be the corded type or the cordless variety. For drilling through hardened concrete, you will definitely find this drill essential. You will soon be rushing to buy a hammer drill. If you are drilling a hole in concrete using a normal rotating drill, you will soon realize that it is impossible. In ‘hammer drill’ mode, and using a masonry drill, the device is good for concrete.īuying Guide For Hammer Drills Why a hammer drill? In ‘screw’ mode, and using a screw bit, the device can be used for fastening and unfastening screws. In ‘drill’ mode, the drill operates like a normal drill which rotates only. This is done by simply pushing a selector into ‘drill’ or ‘hammer drill’ or ‘screw’ mode. Most hammer drills can also be operated as a normal drilling as well as for fastening screws. Selector for drill / hammer drill / screw modes This reduces the wear-down of the serrations and also keeps the chuck cool. There is an in-built clutch mechanism which ensures that, when the chuck is not pressed, the two discs are separated from one another. Depending on the design of the protrusions, the rate of hammering is very high (up to 30,000 BPM). A small hammering impact is delivered to the drill bit. This delivers a blow each time this happens. As they ride over the peaks, they drop to the troughs, aided by a spring. As the disc rotates, its protrusions climb over the protrusion of the other part. In one type of mechanism, one of the disc have protrusions which engages with protrusions on the other disc. This is usually done by having 2 parts working on each other in the transmission. Hammer drills can use different mechanisms to convey impact hammer blows on to the drill bit. This joint hammering and cutting action ensures a smooth hole is produced. The cut concrete pieces are moved up the flutes of the drill bit to the surface. This help to break the concrete while at the same time the drill bit rotates and the edge cuts into the concrete material. This drill bit has a chisel edge which punches into the concrete surface when hammered. You need to use masonry drill bits when drilling into concrete. Joint hammering and cutting to ensure masonry / concrete drilling This is faster and the drill bit will be adequately tight for light to moderate concrete drilling. The drill bit can be quickly tightened by turning the chuck collar using your fingers. On the other hand, keyless chucks are more convenient and user friendly. The chuck with key is preferable if you require a better drill bit tightness. Hammer drills come with an adjustable 3-jaw chuck which could be keyed or keyless type. But rotary hammer drills are more expensive and heavier.įor light to moderate infrequent concrete drilling, hammer drills are usually adequate in completing the job. The rotary hammer drill is regarded as superior to the hammer drill. Hammer drills should be differentiated from rotary hammer drills. The hammer drill should be used for masonry and concrete. If discovered early, can return within the 30-day money back guaranteeīelow are some FAQs. Some reported instances of smoking from the motor after a short initial use.Plastic depth gauge is less durable – steel will be more robust.Powerful motor and offered at great price point. ![]() Chuck with key – more positive tightening with less drill bit loosening.The speed adjustment dial is convenient, less need to depend on trigger pressure.The pricing is very competitive when compared to the cordless type With its dual function, it can also perform as a regular drill for even lighter work.Īs it’s corded, it comes with a pretty powerful motor which generates more power. Meterk is a less known brand but it still does the job as a hammer drill.
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