MIL-DTL-6019E
3.4.4.1 Mechanism adjustment. The mechanism shall be provided with a means to adjust
or correct the indications, in case this becomes necessary during the service of the gage.
Adjustment shall require no special tools. The operating mechanism and dial shall be capable of
being easily removed from the case as a unit in order to facilitate adjustment of the gage.
3.4.4.2 Pointer adjustment. The pointer shall be light and sufficiently rigid to prevent
oscillation under vibration and shall be free to swing beyond either end of the range without
being engaged by a mechanical stop. Suitable stops shall be incorporated within the mechanism
to prevent the sector from being disengaged from the pinion. The pointer shall be firmly attached
to the mechanism, yet shall be readily adjustable.
3.4.4.3 Overpressure stop. An overpressure stop shall be provided on the gage, designed
in such a manner as to restrain the mechanism rather than the pointer. The overpressure stop
shall allow pointer travel beyond full scale to 525 ± 25 pounds per square inch (psi). When
extreme overpressure occurs, the stop shall not allow the pointer to move beyond the bottom
center of the dial.
3.4.4.4 Hair springs. The hair springs shall be made from phosphor bronze.
3.4.4.5 Surge-pressure restriction. A restriction of 0.020-inch diameter shall be provided
between the gage connection and gage mechanism.
3.4.5 Dial. The dial shall be fastened securely upon the frame of the mechanism by at
least two screws in such a manner that it will not loosen or turn when the gage is vibrated.
3.4.5.1 Dial to cover glass distance. The distance between the dial and inside of the
cover glass shall be the minimum practicable and shall not exceed 0.125 inch.
3.4.5.2 Face. The dials shall be as shown in figure 3 and table I for type I gages and
figure 4 and table II for type II gages. The faces shall be sufficiently durable to withstand usage
encountered in service.
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