Pneumatic drills, which are also known as pneumatic hammers and air hammers, use compressed air to operate, and they are used to dig holes, cut surfaces and carve and chip away metal, stone and other materials. The pneumatic drill uses pistons and drill bits to operate.
Pneumatic drills are composed of a piston and a changeable drill bit and attach to a compressed air tank. The piston is the only part of the drill that actually moves, and it moves up and down inside of the cylinder. As the piston moves, a valve opens and the compressed air enters the cylinder. The compressed air then pushes the piston down at the user's desired speed.
The drill bit is another important component of the drill, which is located at the bottom of the cylinder and it is the part that makes contact with the surface material. The drill bit moves in the opposite direction as the piston but with equal force. The drill bit is changeable, so the user can replace this tip or head depending on the intended use. Some common bits are the hammer tip, chisel tip and round-tipped bits.
When using a pneumatic drill, it is important to wear all safety gear, including protective eye wear, gloves and ear plugs. Ensure that the air compressor is unplugged from the unit while it is not in use.