TM 9-243
TYPES AND USES
Parts of a hammer are as follows:
CARPENTER'S HAMMER
The carpenter's hammer is used for driving and pulling
nails and tapping wood chisels.
There are two types of claws.
CAUTION
Never use a claw hammer on a steel punch or on
hardened steel-cut or masonry nails. The face is
too soft and could chip.
Be sure to check for a loose head or a cracked
handle before use.
And there are two types of striking faces.
NOTE
When using a flat-faced hammer to drive a nail, the
nail head must be square with the face of the
hammer at time of impact. The bell-faced hammer
offers a uniform face to the nail head even though
the hammer face is slightly tipped at time of impact .
Hammers come in 7, 13, 16 and 20 ounce sizes. Your
selection should be based upon the following: flat face
for rough work, or bell face for finishing work where you
don't want dents in the finish.
The straight claw is generally used for ripping and
framing. The curved claw is preferred for general use.
MACHINIST'S PEEN HAMMER
All machinist's peen hammers have a flat striking face
on one end of the head for striking punches and chisels.
The other end of the head can be one of the following:
A ball peen hammer is used for forming soft metal,
peening rivet heads, and striking metal in out-of-the-
way places.
21-2
