General Information
1-16
Socket Wrenches,
Ratchets and Handles
Sockets that attach to a ratchet handle
(Figure 7) are available with 6-point or
12-point openings (Figure 8) and
different drive sizes. The drive size
indicates the size of the square hole that
accepts the ratchet handle. The number
stamped on the socket is the size of the
work area and must match the fastener
head. As with wrenches, a 6-point
provides superior-holding ability. While a
12-point socket needs to be moved only
half as for to reposition it on the
fastener. Sockets are designated for
either hand or impact use. Impact
sockets are made of thicker material for
more durability. Compare the size and
wall thickness of a 19-mmhand socket
(Figure 9) (A) and the 19-mm impact
socket (B). Use impact sockets when
using an impact driver or air tools. Use
hand sockets with hand-driven
attachments.
WARNING
Do not use hand sockets with air or
impact tools because they may
shatter and cause injury. Always
wear eye protection when using air or
impact tools
.
Various handles are available for
sockets. Use the speed handle for fast
operation. Flexible ratchet heads in
varying lengths allow the socket to be
turned with varying force and at odd
angles. Extension bars allow the socket
to reach difficult areas. The ratchet is
the most versatile. It allows the user to
install or remove the nut without
removing the socket. Sockets combined
with any number of drivers make them
the most convenient tool for fastener
removal and installation.
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