Hammers
The hammer is a very simple
striking tool, being just a weighted head and handle to direct its course.
The
ball-peen hammer: Often termed the machinist’s hammer is a very useful tool in
workshop and engine room. The head of the hammer is made of hardened steel. The
handle is of hiskory or other hardwood. The flat portion of the head is called
the face, and the other end is known as the peen, the latter being used for
heading rivets and similar peening or drawing operations. The hole for the
handle is the eye. Ball-peen hammers are classed according to the weight of the
head without the handle. They vary in size from 4-ounces to 2.5 pounds, there
popular sizes being the 6-ounces for light work, the 12-ounces for general
utility, and the 16-ounces for heavy work.
The
straight –peen hammer is used for spreading or drawing out material in line
with the handle, while the cross-peen hammer is used for the same operation at
right angles with the handle. The claw hammer is used for driving and pulling
nails.
Hammers
with heads made of soft material, such as lead copper, Babbitt, rawhide,
plastic, etc, are called soft hammers. Soft hammers are generally used where a
steel hammer might mar or injure the work.
Hammer |
Hammer |
The
eye in the hammer head is made with a slightly taper in both directions from
the center. After the handle is inserted in the head, a steel wedges is driven
into the end. This expands the taper of the handle in the eye and wedges the
handle in both directions. If the wedge starts to come out, it should be driven
in again. If the wedge comes out and it lost, it must be replaced before
continuing to use the hammer. Never work with a hammer having a loose head. A
loose head will eventually fly off, and may injure someone.
When
using a hammer, it should be held near the end of the handle with the face of
the hammer parallel to the work. A grip just tight enough to control the blow
is best.
Sledges: Sledge or sledge hammers, are
used for heavy work. They can be procured in single-face and double face types,
a double-face sledge being shown in the figure below, and very in weight from
4-20 pounds. The handles vary in length up to 38 inches.