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A power drill is a powerful tool used to bore holes into exceptionally dense materials. This tool helps to increase productivity by automating a task that would otherwise need to be done by hand.. Judging by the fact that in an average house construction, there may be around 70,000 to 100,000 instances of drilling, using a power drill would result in an increase in the efficiency. This tool is versatile enough to drill through softer targets such as wood and reinforced plastic as well as harder substances like mortar, ceramic, metals, concrete, and even stone. These tools are used by carpenters, masons, building contractors, and plumbers. In addition to these skilled workers, this tool can even be used by ‘home workshop’ aficionados, and is a handy tool to be included in any tool kit. Since the power drill requires one-handed operation, it can be used for drilling in relatively inaccessible areas. Some power drills also offer the user the option to replace the drill bit with a screwdriver bit, enabling the drill to work as a driver to drive in fasteners such as screws and bolts into the material.
Features and working of a power drill
A power drill is normally hand-held and the body of the drill tapers towards a chuck which holds the drill bit. The drill bit is made of a reinforced metal and has a serrated tip. This is the component of the drill that performs the actual drilling action through rapid rotational motions, which chip off granules from the surface of the material concerned. Most power drills are powered either by electricity or compressed air.
Electric power drills may be corded or cordless. Corded power drills are shipped with a power cord attached, implying that they need to be connected to a power source in order to be used.. Cordless power drills have removable, Rechargeable batteries in them, rendering them completely portable. These cordless tools are very useful when there does not happen to be a power source in the vicinity of the work area and they can also be carried around and used in the outdoors too. Electrical cordless drills work at around 18 volts, offering a no-load output of approximately 1500 revolutions per minute (rpm) and a torque of around 550 inch pounds.
Power drills that work with compressed air are called pneumatic drills. These drills are connected to air tanks in which the pressurized air is contained. When the tool trigger is depressed, this compressed air is allowed to flow at high velocity into the body of the drill causing the chuck to rotate.
Hammer drills are power drills that combine rotational motion with a hammering action. Pneumatic hammer drills have a full load rotation of around 1000 rpm, resulting in around 40,000 blows per minute (bpm). Electric hammer drills use between 14.4 to 24 volts to output approximately 15,000 to 50,000 bpm. Since these tools consume a large amount of power, the often use extended run-time batteries, which have a double benefit of a longer life coupled with more run time. A unibody powertrain feature aligns the chuck, gearbox, and motor to create the most efficient drivetrain system.
Since the chuck is the part of the drill that bears the most pressure and also is most vulnerable when the drill is dropped, it is encircled by a steel reinforced collar. Most drills have a keyless chuck, enabling tool-less loosening and tightening of the chuck to remove or replace the drill bits.
What to look for in a power drill
The body of the drill has a sturdy construction for enhanced durability. Some hammer drills have a built-in overload protection facility which avoids overheating of the motor, another cause of shortened tool lifespan. All-metal gears further increase the resilience.
The handle of the power drill is ergonomically contoured to increase the comfort Level for the user. The location of the trigger and the other buttons provides easy control accessibility when the tool is being used. A 360 degree side handle provides a two handed grip for increased stability and accuracy. Some drills have a no-mar tip to prevent any scarring of the work surface. A ratcheting chuck enables the drill bit to be held with a firm vice-like grip. Sometimes, the chuck is magnetic for even better holding of the drill bit. Cordless drills are normally shipped with spare batteries and also a battery charger.
As with any motorized tool having so many moving parts, there is bound to be a certain amount of noise being emitted. A noise muffling feature would be beneficial to the user’s ears during prolonged usage.
Some reputed manufacturers of power drills include Bosch, Campbell Hausfeld, Chicago Pneumatic, Dewalt, Fein, Grip, Ingersoll Rand, Makita, Milwaukee, Ryobi, and Viking.
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