MIL-L-23249D
machine. Such processes may be used only for enhancing surface finish and
appearance.
3.3.2 Welding , brazing or soldering. Welding, brazing, or soldering
shall be employed only where specified in the original design. None of
these processes shall be employed as a repair measure for any defective
part.
3.3.3 Fastening devices. All screws, pins, bolts, and other fasteners
shall be installed in a manner to prevent change of tightness. Fastening
devices subject to removal or adjustment shall not be swaged, peened,
staked, or otherwise permanently installed.
3.3.4 Surfaces. All surfaces shall be clean and free of sand, dirt,
fins, sprues, flash, scale, flux, and other harmful or extraneous materials.
All edges shall be either rounded or beveled unless sharpness is required to
perform a necessary function. Except as otherwise specified herein, the
condition and finish of all surfaces shall be in accordance with the
manufacturer's commercial practice.
3.3.5 Painting. All surfaces to be painted shall be cleaned of all
foreign matter. Unless otherwise specified (see 6.2.1), the machine shall
be painted in accordance with manufacturer's standard commercial practice
which shall be not less than one coat of primer and one coat of finish
color.
3.3.6 Threads. Except for the leadscrew, when applicable, all threaded
parts used on the machine and its related attachments and accessories shall
conform to FED-STD-H28 and the applicable "Detailed Standard" section
referenced therein.
3.3.7 Dials. All dials that indicate stock removal or tool movement
shall be graduated in increments not larger than 0.001 inch. Dial diameters
shall be such that graduations may be read from the normal operating
position. Dials shall be permanently and legibly engraved or etched on a
nonglare background.
3.3.8 Plates. All words on instruction and indicating plates shall be in
the English language. Characters shall be engraved, etched, embossed or
stamped in boldface on a contrasting background.
3.3.9 Gears. All gears shall be constructed from a material suitable for
the intended purpose. All metal gears shall remachined and heat treated by
a process that will impart the hardness, surface finish and toughness that
will enable the gear train to transmit full-rated torque of the drive motor
without gear damage, failure or premature deterioration and wear. All gears
shall be manufactured to definite established standards to provide for
interchangeability and parts replacement.
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