File Filosophy
Being some Hints regarding the proper Methods of using Files and the various Applications of the most common Files
År: 1913
Forlag: Nicholson File CO.
Sted: Providence, R.I., U.S.A.
Udgave: Eight Edition [revised]
Sider: 47
UDK: 621.91 Nich Gl.
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FILE FILOSOPHY
SQUARE File. Taper. Double cut, bastard.
Length, 3" to 18".
Use: In almost all branches of mechanical industry,
principally for enlarging apertures of a square or rec-
tangular shape.
Square Blunt File. Blunt. Double cut,
bastard. Length, 10" to 20". Use: By engine build-
ers, and in the shops of railroads and ship-yards, for
the rougher work in finishing or enlarging mortises,
key-ways, or splines, when of considerable length.
WARDING File. Parallel in thickness, much
tapered in width. Double cut, mostly bastard. Length,
3" to 10".
Use: Considerably used by jewelers and machinists;
but more especially by locksmiths, in filing the ward
notches in keys.
Drill File. Cut only upon its edges. Especially
adapted to extending or rounding the bottom of slits,
where the round file would be found too frail; also as
a drill file, for filing small twist drills, and for other
purposes of a similar nature.
NICHOLSON FILE CO.