USE/CARS OF HANDTOOLS & MEASURING TOOLS - OD1621 - LESSON 2/TASK 1
(c) Combination Open and Box Wrenches.
Combination wrenches
(figure 16 on the previous page) have one open-end and a box wrench at the
other end. Combination wrenches may be made with any combination of sizes,
offsets, and angles, as discussed in (a) and (b) above.
(d) Socket Wrenches. The common socket wrench is boxlike and made
as a detachable socket (figure 17 on the following page) for various types
of handles. A socket wrench set usually consists of various sized sockets,
a ratchet (figure 18 on page 35), a sliding bar tee, a speeder, a speed tee,
a ratchet adapter, a nut spinner, a 3/8 inch drive handle, and extensions.
Socket wrenches have two openings, one a square hole which fits the handles
and the other a circular hole with notched sides to fit the bolt or screw
head or nut to be turned. The square hole is made 1/4, 3/8, 1/2, 3/4, or 1
inch in diameter; each must be driven with the matching drive or speeder
handle. The notched opening may have 6, 8, or 12 points. Socket wrenches
are the fastest wrenches to use, since the ratchet handle permits the socket
to remain on the nut or bolt and the handle does not have to be removed from
the socket for turning. Socket wrenches are sized from 5/32 to 3 1/8 inches
in steps of 32nds, 16ths, or 8ths of an inch.
(e) Special Socket Wrenches.
Some socket wrenches are not
detachable and are of one piece construction, such as the four-way socket
wrench and the 90 offset handle shown in figure 19 on page 35.
Other
socket wrenches are of the screwdriver type, having a six-pointed or a
square socket. These may be straight or offset and have a T-type or regular
screwdriver handle.
Two types of stud remover sockets are available that
are used with any 3/4 inch square drive socket wrench handle. One type has
an eccentric cam which grips soft or hardened studs.
The driving shank
extends through both sides of the housing to provide a bearing surface on
each side of the cam and prevents binding. The cam type has a capacity of
1/4 to 3/4 inch. The heavy-duty wedge-type stud remover socket works on the
wedge principle and takes a positive grip which can be released only when
the tool is turned in the reverse direction. Two sizes of steel wedge are
included with the socket. This type has a capacity of 9/16 to 1 inch.
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