The chain saw (fig. 14- 17) is a heavy-duty pneumatic
device, designed primarily for cutting trees or timbers up
to 24 inches in diameter during clearing operations. The
chain saw is also used to accomplish heavy timber
construction, such as bridges, bunkers, and culverts.
The pneumatic nail driver (fig. 14-18) is a
lightweight member of the reciprocating percussion
family of tools and used primarily for driving large nails,
spikes, and driftpins in heavy timber construction.
When the nail driver is equipped with the proper
attachment, it may also be used for other purposes, such
as riveting, shearing heads from bolts and rivets, and
removing scale and rust from metal plates or objects.
The pneumatic drill (fig. 14-19) is a heavy-duty
low-speed tool, designed to drive ship auger type of
drills. The pneumatic drill is used extensively in trestle
bridges and other timber construction work where it is
necessary to drill holes for bolts or pins.
The pneumatic circular saw (fig. 14-20) is built for
heavy-duty use on timber construction work and maybe
used for ripping as well as crosscut sawing. When the
circular saw is equipped with the appropriate abrasive
disk, designed for the specific material to be cut, it may
also be used to cut brick, stone, concrete, tile, and similar
Safety rules for pneumatic tools are as follows:
. Keep your hands and fingers off the trigger or
throttle until you are ready to start the tool.
. Always keep your balance.
. Never get your face close to the tool.
Figure 14-17.Pneumatic chain saw.
Figure 14-18.Pneumatic nail driver.