These symbols are illustrated and described below. On hammer drills, the mode switch allows you to choose between normal drilling and hammer drilling (for masonry drilling). You should never change the direction of drive whilst the tool is still operating, as it is highly likely you will damage the tool’s gears. If flicked between forward and reverse in a neutral position, it also locks the switch to prevent accidental operation of the tool. This feature is found on all hammer drills, and can be very helpful if you need to remove screws, or if you need to release your drill bit after it has jammed in a hole. With a flick of this switch, the drilling direction changes to allow for forward and reverse motion (right and left motion respectively). For more safety recommendations, click here. If not, the tool will begin to operate upon reconnection and may result in injury. Make sure this button has been released prior to disconnecting the tool. To cease this function, simply pull the trigger. This button can be pushed while the trigger is depressed and the trigger will lock on to that set speed. This construction allows for more accurate speed selections. On some drills, a small dial in the middle of the trigger controls the variable speed. The further you depress this trigger, the faster the drill will rotate. The most common type is the variable speed trigger. When this trigger is pressed, the drill will begin to operate. All portable drills are activated by a trigger switch. The switch allows the electricity from the power source to flow through the tool. They are generally not as powerful as their corded equivalents and require regular charging, but are usually considerably light in weight and have unmatched portability. In Australia, hammer drills operate off mains power (240V) through a 10A socket.Ĭordless hammer drills that are powered by a battery and a charger are also available and bear very similar features to those described below. On hammer drills, this is done through a wired connection to a mains power supply. The power source is the component that provides the tool with electricity. Knowledge of these parts also aids in the efficient and effective use of the tool. Hammer drills feature many different components, and having a sound understanding of these plays an important part in finding the best hammer drill for you. The rating on hammer drills to indicate the maximum speed of this ‘hammer action’ is the blows per minute (bpm). Therefore, the faster the drill rotates, the faster this ‘hammer action’ is, and the faster it becomes to drill through masonry. These plates connect when pressure is applied to the chuck, and as the chuck rotates, these plates rapidly move the drive shaft back and forth. The ‘hammer action’ is produced by two metal plates connected to the drill’s drive shaft that have opposing raised edges. This ‘hammer action’ enables the drill to produce rapid vibrations that chip away at masonry work whilst the chuck continues to rotate. The hammer function is the setting used on hammer drills to drill through masonry. Hammer drills are also extremely adept at boring various size holes through metal, wood and plastics. This ability is the main difference between a hammer drill and a rotary drill or high torque drill. These tasks include a hammer drills ability to easily penetrate masonry, which comprises of materials such as bricks and concrete. Hammer drills (also known as impact drills or percussion drills) are incredibly versatile tools that are capable of performing many trying tasks.
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