Hammer Drill also called a percussion drill or impact driver is an energy-wasting Power Tool utilized mainly for drilling holes in non-porous materials. It is simply a kind of rotating Drill with an impact mechanism that generates a striking force against the work surface to be drilled. Hammer drills are basically constructed with a base, a chuck, and a drill head. The chuck is usually a solid steel shaft attached to the head of the drill. The chuck’s function is to hold the work during the drilling operation.
One of the major advantages of the Hammer Drills for concrete is its capability to drill through various kinds of metals including iron, aluminum, brass, zinc, and tungsten. However, due to the torque generated by the impact driver mechanism, these types of drills tend to rip through softer metals such as copper or brass. Although the chuck can rotate with moderate torque, soft metals usually do not fare well with repetitive drilling operations because the hammer drills tend to clog and pit the drill bits. Moreover, the drills do not produce a hole with a uniform diameter.
The Hammer Drill – The Most Versatile Power Tool For Drilling Concrete
One of the disadvantages of using a hammer drill attachment is that it can only be used for small holes. Even if a bigger hole is needed, the drill bits may not be big enough to penetrate the material comfortably. For instance, hole 4 inches long would normally require the use of a motorized drill to make a hole of that size. But due to the lack of motorization in the case of rotary drilling, the hole is not that large and there is a risk of damage to the tool and the workpiece if excessive force is used on the drilling operation.
Rotary hammers are most commonly used in the drilling of holes in concrete. A standard drill has a hole that is drilled directly into the concrete. The advantage of using rotary hammer drill bits is that the hole is drilled faster and with a greater diameter than with the regular drill. With the rotary hammer, the hole is drilled at a greater diameter because the bit is pulled outwards to achieve the hole. The general process is more stable and durable than that of a regular drill.
A disadvantage of the hammer drill cord is that the bit can damage masonry surfaces if struck hard enough. This is mainly due to the irregularity in the shape of masonry blocks. Another problem is that the depth of the hole will not be very precise. A good technique is to use a hand-held device for boring a hole in the concrete and then to polish or finish the concrete when the hole is already drilled a few inches deep.
A further disadvantage is that the power supplied by the hammer drill parts to drive the bit is in proportion to the weight of the material being drilled. If the drill is too heavy, the drill can break causing serious injury. An excellent method of drilling holes into concrete is to apply patching cement to a small portion of the hole before starting the hammer drill. Once the hole is drilled, apply the cement and slowly drive the drill bit into the cement to fill the entire hole.