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tech
jeepfan.com
Guide to a Jeeper's Garage
Hand Tools
File
NorthernTool.com
file set
A file (or
hand-file) is a hand tool used to shape material by
abrasion. A file typically takes the form of a hardened
steel bar, mostly covered with a series of sharp, parallel
ridges or teeth. Most files have a narrow, pointed tang at
one end to which a handle can be fitted. The rasp is a
related tool which is generally larger and has raised,
pointed teeth on its surface rather than straight ridges.
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Files come in a wide
variety of sizes, shapes, and tooth configurations.
The cross-section of a file can be flat, round,
half-round, triangular, square, knife edge or of a
more specialized shape. A file's teeth can range
from rough, coarse and bastard (meaning
intermediate) to second-cut, smooth and dead smooth.
A single-cut or mill file has one set of parallel
teeth, while a cross-cut or double-cut file has a
second set at an angle to the first. In
Swiss-pattern files the teeth are cut at a shallower
angle. Most files have teeth on all faces, but some
specialty flat files have teeth only on the face or
only on the edge, so that the direction of cutting
can be more carefully controlled.
Special Types
Diamond Cut -
Instead of having teeth cut into the file's working
surface, diamond files (pictured to the right) have
small particles of industrial diamonds embedded in
their surface (or into a softer material that is
bonded to the underlying surface of the file). The
use of diamonds in this manner allows the file to be
used effectively against extremely hard materials,
materials that would blunt an ordinary high carbon
steel file quickly.
 Riffler -
Riffler files
are small to medium sized files in an assortment of
cross sectional shapes and profiles. The varying
profiles and shapes enable them to be used in hard
to reach, or unusually shaped areas. They are often
used as an intermediate step in die making where the
surface finish of a cavity die may need to be
improved. - eg; plastic injection moulding or die
casting
Needle -
small files that are
used in applications where the surface finish takes
priority over metal removal rates but they are most
suited for smaller work pieces. |
Recommendation
Most automotive
work would involve the use of a standard type file. A
file set from a quality tool manufacturer should be
sufficient.
Popular File
Manufacturers and Resellers
Craftsman
SnapOn
Matco
Husky
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