The chipping hammer consists basically of a steel piston that is reciprocated (moved backward and forward alternately) in a steel barrel by compressed air. On its forward stroke the piston strikes the end of the chisel, which is a sliding nozzle pressed into the barrel. The rearward strokes cushioned by compressed air to prevent any metal-to-metal contact.
Reciprocation of the piston is automatically controlled by a valve located on the reared of the barrel. Located on the rear end of the barrel is a grip handle, containing a throttle valve. The pneumatic chipping hammer may be used for bevelling, caulking or beading operations; and for drilling in brick, concrete, and other masonry.
Chipping hammers should not be operated without safety goggles, and all other persons in the immediate vicinity of the work should wear goggles. While working, never point the chipping hammer in such a direction that other personnel might be struck by an accidentally ejected tool. When chipping alloy steel or doing other heavy work, it is helpful to dip the tool in engine lubricating oil about every 6 inches of the cut and make sure the cutting edge of the tool is sharp and clean. This will allow faster and easier cutting and will reduce the possibility of the tool breaking.
When nearing the end of a cut, ease off on the throttle lever to reduce the intensity of the blows. This will avoid any possibility of the chip or tool flying. If for any reason you have to lay the chipping hammer down, always remove the attachment tool from the nozzle. Should the chipping hammer be accidentally started when the tool is free, the blow of the piston will drive the tool out of the nozzle with great force and may damage equipment or injure personnel.
Typical applications for chipping hammers are cutting, de-burring, cleaning, hole-making, edge cutting, and light demolition. Metals come in different alloys and hardness, and construction material such as concrete can be reinforced. Chipping is the process of working on materials with a wedge-shaped tool (the chisel) to separate or chip material. The chisel's cutting effect is achieved by hammering on the chisel's head end, which is an energy and time consuming operation