MIL-DTL-81963C
3.7.4 Endurance (see 4.10.4). Unless otherwise specified in the applicable general specification, the
servocomponent shall be energized and either electrically or mechanically loaded, or both, and either
driven or non-driven as specified in the applicable general specification, and shall operate or be operated
under the applicable conditions specified in 4.10.4. Immediately after meeting this requirement, the
servocomponent shall meet the requirements specified in the applicable general specification.
3.7.5 Ambient temperature.
3.7.5.1 Ambient low temperature(see 4.10.5.1). The servocomponent shall operate at -55 ± 2
degrees C and shall meet the requirements specified in the applicable general specification.
3.7.5.2 Ambient high temperature (see 4.10.5.2). The servocomponent shall operate at the high
ambient temperature specified in the applicable specification and shall meet the requirements specified
therein.
3.7.6 Moisture resistance (see 4.10.6). The servocomponent shall operate, or while in storage,
withstand 10 continuous 24-hour high humidity and temperature combination cycles. After completion of
the final 24-hour recovery period, the servocomponent shall meet the requirements as specified in the
applicable general specification.
3.7.7 Audible noise, Structureborne (see 4.10.7). When required by the applicable general
specification, the Structureborne noise generated in the frequency range of 20 Hz to 9,600 Hz, expressed
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in terms of acceleration dB above a reference acceleration of 0.001 cm/second (9.82 x 10 g), shall not
exceed the limiting value or values specified in the applicable documents and the specification sheets that
cite MIL-DTL-81963 as a direct reference.
3.7.8 Explosion resistance (see 4.10.8). When required by the applicable general specification,
servocomponents shall operate in the presence of an explosive-gaseous mixture with air, without causing
an explosion.
3.7.9 Salt atmosphere (see 4.10.9). When required by the applicable general specification,
servocomponents shall withstand atmosphere saturated with salt-laden moisture. On completion of the
salt atmosphere test, there shall be no visual evidence of corrosive buildup anywhere within the
servocomponent, nor evidence of destructive deterioration.
3.7.10 Identification marking. Servocomponents shall, as a minimum, be identified by marking, as
specified on figure 2 and MIL-STD-130. Markings shall be applied by acid or electric etching, by
permanent marking ink or by engraving, and shall be read from the terminal end. Irrespective of the
method used, the marking shall be applied directly to the servocomponent housing; i.e., the use of a
separate nameplate attached to the housing is not permitted. The markings shall be such as to withstand
and to remain legible following the environmental requirements specified herein.
3.8 Workmanship. The servocomponent, including all parts and accessories, shall be manufactured
and finished in a thoroughly workmanlike manner. Particular attention shall be paid to neatness and
thoroughness of soldering, wiring, marking and plating. All dimensions and tolerances not specified shall
be consistent with best engineering conventions. Where dimensions and tolerances affect
interchangeability, operation or performance of the servocomponent, they shall be held or limited
accordingly. All materials shall be sound, of uniform quality and condition, and free from seams, cracks,
and other defects which may adversely affect the strength, endurance, or wear of the part. Any material
hammered, filed, or treated in any other manner to conceal defects therein shall be subject to immediate
rejection.
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