TM 1-1500-204-23-9
CHAPTER 4
GENERAL MAINTENANCE TOOLS
4-1. General. The general maintenance tools covered
in this chapter are those tools which are most commonly
used in the maintenance of Army aircraft. Regardless of
the type of work to be done, a mechanic must select and
use the correct tools in order to do his work quickly,
accurately, and safely. Without the correct tools and the
knowledge to use them, he wastes time, reduces his
efficiency, and may even injure himself. This chapter
explains the purposes, correct use, and proper care of
the more common tools.
4-2. Hammers and Mallets. Hammers are striking
tools which are composed of a head made of metal,
plastic, leather, or wood mounted on a handle. The
handle is usually made of wood, although some modern
hammers and mallets have handles made of fiberglass.
a.
Types. The more common types of
hammers and mallets are described in the following
paragraphs.
(1)
Ball peen hammer. The ball peen
hammer is the type most often used by mechanics. It
has a steel head and is usually available in 4-, 6-, 8-,
and 12ounces, and 1, 1 1/2-, and 2-pounds. As figure 4-
1 shows, this hammer is identified by the ball-shaped
peen at the opposite end of the face.
Figure 4-1. Ball Peen Hammer
(2)
Body hammer. A body hammer,
shown in figure 4-2, is used to straighten and form
metal.
(3)
Riveting
hammer.
The
riveting
hammer, shown in figure 4-3, is used for driving rivets
and for light chiseling. One end of the head is cross
peened. The other end may have either a square or a
chamfered face.
Figure 4-2. Body Hammer
Figure 4-3. Riveting Hammer
(4)
Setting hammer. The setting hammer
has a square flat face on one end of the head and a
sloping beveled edge on the other end. It is used in
sheet metal work for leveling and bending edges and for
setting double seams. An example of this type of
hammer is shown in figure 4-4.
Figure 4-4. Setting Hammer
4-1
