USE/CARE OF HANDTOOLS & MEASURING TOOLS - OD1621 - LESSON 2/TASK 2
Nos. 00, 0, 1, 2, 3, 4, and 6. They are usually supplied in sets of 8 or 12
assorted files in a box, although individual files are issued. The handles
are knurled for a better grip.
The Swiss pattern files are designed in
twelve shapes.
FIGURE 98.
SWISS PATTERN FILES.
c. Use of Files.
(1) Selecting the Proper File.
(a) For heavy, rough cutting, a large coarse, double-cut file is
best.
(b) For finishing cuts, use a second- or smooth-cut, single-cut
file.
(c) When working on cast iron, start with a bastard-cut file and
finish with a second-cut file.
(d) When filing soft
metal,
start
with
a
second-cut
file
and
finish with a smooth-cut file.
(e) When filing hard
steel,
start
with
a
smooth-cut
file
and
finish with a dead smooth file.
127
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