TM 1-1500-204-23-9
(5)
Lead or copper hammer. The lead or
copper hammer is usually used for aligning steel
surfaces. Atypical hammer of this type is shown in figure
4-5. The working surfaces of this hammer can be filed
to restore even faces.
Figure 4-5. Lead or Copper Hammer
(6)
Soft-faced hammer. The soft-faced
hammer, shown in figure 4-6, is capable of delivering
heavy blows to machined, highly polished, or soft
surfaces without damage to those surfaces. On some of
these hammers, the faces can be removed and replaced
when damaged or when a different hardness or
toughness is required. These faces are color coded
according to their hardness or toughness, as shown in
the following listing:
HARDNESS
SYMBOL
COLOR
Soft
S
Brown
Medium
M
Red
Tough
T
Green
Medium-hard
N
Cream
Hard
H
Black
Extra-hard
XH
Yellow
Table 4-1 shows which substances provide the required
hardness for a specific application.
Figure 4-6. Soft-Faced Hammer
(7)
Mallets. Mallets are generally made
of softer substances for working items which would be
damaged by metal hammers. The following paragraphs
describe some of the more common types.
(a)
Rawhide mallet. The rawhide
mallet has a cylindrical head which is made by tightly
wrapping and staking a sheet of leather. It is used for
forming and shaping sheet metal, and is shown in figure
4-7.
Figure 4-7. Rawhide Mallet
(b)
Rubbermallet.
The
rubber
mallet shown in figure 4-8 has a cylindrical rubber head.
It is used for forming sheet metal, driving dowels, and
small stakes.
Figure 4-8. Rubber Mallet
(c)
Tinner's mallet. The tinner's
mallet shown in figure 4-9 has a cylindrical wooden head
which is from 1 1/4 to 3 1/2 inches in diameter and from
3 to 6 inches in length. It is used to form and shape
sheet metal.
Figure 4-9. Tinner's Mallet
4-2
