USE/CARE OF HANDTOOLS & MEASURING TOOLS - OD1621 - LESSON 2/TASK 2
3.
Files
a. Purpose.
Files are used for cutting, smoothing off, or removing
small amounts of metal.
b. Types of Files. Files (figure 95 on the previous page) are made in
various lengths, shapes, cuts, and teeth-spacing.
Every file has five
parts: the point, edges, face or cutting teeth, heel or shoulder, and tang
(figure 96).
FIGURE 96.
PARTS OF A FILE.
(1) File Teeth Characteristics.
Figure 97 on the following page
illustrates the different types of file teeth.
(a) Single-Cut Files.
Single-cut files have a single set of
diagonal rows of teeth. The teeth are parallel to each other throughout the
file.
(b) Double-Cut Files. Double-cut files have two sets of diagonal
rows of teeth. The first set is called the overcut. On top of the overcut
set, a second is made crossing the first.
The second set is called the
upcut and is not as coarse or as deep as the overcut.
(c) Rasp-Cut Files. Rasp-cut files are made by a pointed tool or
punch which forms each short tooth separately.
Teeth are formed
consecutively, side by side, to form a line or row of teeth.
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