USE/CARE OF HANDTOOLS & MEASURING TOOLS - OD1621 - LESSON 2/TASK 1
(9) Handsaw Filing Vise. The handsaw filing vise (figure 42 on the
previous page) is another specially designed vise.
It has a 9 1/2 to 11
inch jaw width which holds handsaws in the correct position for sharpening
their teeth, and an attachment for holding the file at a definite constant
angle.
c. Types of Clamps.
(1) C-Clamps. A C-clamp (figure 43 on the following page) is shaped
like the letter C.
It consists of a steel frame threaded to receive an
operating screw with a swivel head.
They are made for light, medium, and
heavy service in a variety of sizes.
(2) Hand Screw Clamps.
A hand screw clamp (figure 43) consists of
two hard maple jaws connected with two operating screws. Each jaw has two
metal inserts into which the screws are threaded.
These clamps are also
issued in a variety of sizes.
d. Use of Vises.
(1) When holding soft metal in n vise, material softer than the
workpiece must be used in the jaws to prevent damage to the work. The work
should be held securely to prevent it from slipping, but not so tightly as
to cause damage.
(2) When holding hard material, turn the screw of the vise up
tight and tap the end of the handle sharply for the final tightening.
(3) To hold irregularly shaped work in a vise requires a little
thought.
Make certain the jaws grip on a firm even surface of the work.
The swivel jaw type of vise (not illustrated) is especially suited to hold
tapered or irregular work, since one jaw can be swiveled.
A tapered pin
must be removed before the jaw can be swiveled.
(4) Cylindrical work can be held between straight jaws; however,
it is better to insert V-cut jaws over the straight jaws for this work.
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