3.2.10 Interchangeability. All parts having the same manufacturer's part
number shall be functionall y and dimensionally interchangeable. All parts
s h a l l be manufactured to such standards as will permit replacement or
adjustment without modification of parts or positioner.
3 . 3 Construction. The positioner shall be constructed of parts which
are new, with out defects, and free of repairs. The structure shall withstand
all forces encountered during operation of the positioner to its maximum
rating and capacity without permanent distortion or failure.
3.3.1 Castings and forgings. All castings and forgings shall be free of
d e f e c t s , scale, and mismatching. No processes such as welding, peening,
p l u g g i n g , or filling with solder or paste shall be used for reclaiming any
d e f e c t i v e part. Such processes may be used only for enhancing surface finish
and appearance.
3.3.2 Fastening devices. A l l fasteners shall be installed to prevent
change of tightness. Fastening devices subject to removal or adjustment shall
not be permanently installed.
3 . 3 . 3 Surfaces. A l l surfaces shall be clean and free of 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 (see 6.2), the condition and finish of all surfaces shall be
in accordance with the manufacturer's commercial practice.
3.3.4 Weldin g, brazinq, or soldering. W e l d i n g , brazing, or
soldering
shall be employed only where specified in the original design. None of these
operations shall be employed as a repair measure for any defective part.
U n l e s s otherwise specified (see 6.2), the positioner
3.3.5 Painting.
accordance with the manufacturer's standard commercial
shall be painted in
practice and color.
3.3.6 Threads. A l l threaded parts u s e d on the positioner a n d i t s
related attachments and accessories shall conform to FED-STD-H28 and the
applicable "Detailed Standard" section referenced therein.
3.3.7 Gears. All gears shall be constructed from a material suitable for
the intended purpose. All drive gears shall have a hardness, surface finish,
and toughness that will enable the gear train t o transmit full-rated torque
and horsepower of the drive motor without gear damage, failure, or premature
deterioration and wear of the positioner.
3 . 3 . 8 Electromagnetic interference control. W h e n specified (see 6.2),
equipment furnished under this specification shall comply with MIL-STD-461.
The equipment and subsystem(s) class and the emission and susceptibility re-
quirements shall be as specified.
3.4 Components. The positioner shall consist of not less than a frame
and base assembly, t a b l e , table drive system, motor controls, and components
necessary to comprise a complete positioner system.
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