TM 9-243
CARE OF FILES
1.
A new file should be broken in by using it first on
brass, bronze, or smooth iron.
2.
Never use a new file to remove the fins or scales
on cast iron.
3.
Do not use a new file on a narrow surface such as
sheet metal, because the narrow edge of the metal
is likely to break off the sharp points on the file
teeth.
4.
After using a new file, the teeth will clog up with
metal filings.
5.
Using a clogged file will scratch the work. This
condition is called pinning.
6.
One way to help prevent pinning is by rubbing
chalk between the teeth before filing.
7.
The best method to keep the file clean is to use a
file scorer and file cleaner brush.
8.
When cleaning a file with a file scorer (1), use a
pulling motion, holding the file scorer blade parallel
to the rows of teeth (2).
9.
Finish cleaning by brushing the file parallel to the
rows of teeth, with the file cleaner brush.
10.
Do not throw files into a drawer or toolbox where
they can rub against each other or against other
tools. Store them in separate holders such as
clips, straps, or in holes cut in a block of wood.
11.
Clean files often.
15.
Never strike the file against a vise or other object to
remove filings. Use the file cleaner brush.
16.
Never store files with lubricants or rust-preventive
compounds on them. Wrap each file in a water-
proofed barrier wrapping paper and place the files
in racks or boxes so that the faces or edges of the
files will not touch each other.
12.
Never use a file without a securely attached
handle (3), unless it is of the Swiss pattern type.
13.
Do not use files for any other use except filing.
14.
Do not oil files. This will cause the file to slide
across the work, preventing fast cutting.
28-5
