A hand drill is a relatively small drill that is held in the hand when used. Some people reserve the term specifically for drills that are operated by hand, distinguishing between hand-held power drills and drills that are powered by their users. Many hardware stores sell hand drills, along with bits that can be used for various drilling projects, and a drill can be a very useful tool to keep around the house, shop, or car.
In the case of a drill that is operated by hand, the tool has a circular crank that the user turns to operate it. The circular motion of the crank drives the bit, causing it to drill a hole. This device can be used in a range of applications, some of which are more esoteric than others. For example, a hand drill can be used to start a fire when other tools are not available, with the tool being used to create friction that causes heat and the eventual outbreak of flames.
Traditional hand-powered drills require little in the way of maintenance. The user should periodically wipe down and oil the tool so that all of the parts move smoothly, and occasional oiling may be needed to prevent rust. Various components, such as wooden handles or the screws that hold the bit in place, may also need to be replaced now and then as a result of wear.
In terms of hand-held power drills, there are a range of options that can be divided between corded and cordless drills. These devices can be fitted with a range of bits that can drill holes, drive screws, mix paint, and stand in for a variety of other tools. The performance of such drills varies, depending on the amount of power they have and how well maintained and constructed they are.
An electric hand drill generally requires more careful maintenance, because it has more parts. If the tool is corded, the cord must be kept in good working order to prevent fraying and the risk of shock. The drill must be periodically broken down for cleaning and oiling to keep it running smoothly, and it may be necessary to inspect the wiring and circuits to confirm that they are in good working order. Drills that are powered by batteries also the owner to care for the batteries properly to ensure that they have a long and productive life.