A drill is a tool used for making round holes or driving fasteners. It is fitted with a bit, either a drill or driverchuck. Hand-operated types are A cordless drill is an electric drill which uses rechargeable batteries. Drills are primarily used for drilling circular holes in material, or for inserting screws and other threaded fasteners into material. a machine for drilling, reaming, counterboring, and tapping holes especially : a power machine for drilling holes in metal as a drill press or radial drill.
Working Principle of Drilling Machine: When the power is given to the motor, the spindle rotates and thereby the stepped pulley attached to it also rotates. On the other end, one more stepped pulley is attached and that is inverted to increase or decrease the speed of the rotational motion. The basic parts of a drilling machine are a base, column, drill head and spindle.
The base made of cast iron may rest on a bench, pedestal or floor depending upon the design. Larger and heavy duty machines are grounded on the floor. The column is mounted vertically upon the base. Drills are most commonly used to drill holes and to drive in screws and other small fasteners. They make a great choice for quick projects around the home. Some may ask, what is an impact driver used for? Impact drivers are more commonly used to drive in a large quantity of fasteners, longer screws and lag bolts.
