MIL-W-80027D
3.2.12 Portability. The welding machines shall be portable, and shall be
base mounted. Running gear, if required (see 6.2.1), shall be as specified
by the procuring activity. The welding machines shall be provided with a
lifting device for handling by crane or hoist, and shall be capable of
supporting 2-1/2 times the weight of the machine. The center of gravity of
the entire unit shall be as low as is consistent with economical design.
The machine shall also be designed to be lifted by forklift truck.
3.3
Construction.
The welding machine shall be constructed of parts
which are new, without defects and free of repairs. The structure shall be
capable of withstanding all forces encountered during operation of the
machine to its maximum rating and capacity without permanent distortion.
3.3.1
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.
3.3.2 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.
3.3.3
Surfaces.
All surfaces shall be clean and free of sand, dirt,
fin, 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 manu-
facturer's commercial practice.
3.3.4 Painting. All surfaces to be painted shall be cleaned of all for-
eign 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.
3.3.5 Threads.
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.
3.3.6 Dials. Dial diameters shall be such that graduations may be easily
read. Dials shall be permanently and legibly engraved or etched on a non-
glare background.
3.4
Components.
The welding machines shall consist of, but not be
limited to, the following components:
enclosure, transformer, rectifier,
controls, and ventilation system.
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