MIL-DTL-12713E
quadrant under test with the settings of the inspection aid and following the procedure
outlined above as required for each scale settings. Any error, not cumulative, shall be
observed and shall not exceed the tolerance specified.
4.9 Torque. A commercial type torque wrench capable of measuring to the torque
values specified shall be utilized for this test. An appropriate adapter to accommodate the
micrometer knob shall be used with the torque measuring device. Readings taken with the
torque wrench shall be observed in both directions and while in motion. The running
torque required to rotate the micrometer knob shall conform to 3.8 when tested at ambient
temperature and checked at the high and low operating temperatures during verification
4.4.2.
4.10 Index alignment. With the micrometer dial indicating zero, the zero index line
on the level holder shall coincide with the index line on the arm within the tolerance
specified in 3.9. This index alignment is required on each side of the quadrant. Index
alignment at the settings specified shall be determined by a visual and tactile examination.
As a means to facilitate the measuring of any misalignment of the indices a commercial
type optical comparator with appropriate tolerance mark may be utilized.
4.11 Perpendicularity. Perpendicularity of the two sets of shoes shall be inspected
on either a Coordinate-Measuring Machine (CMM) or on a leveled surface plate, utilizing
gage blocks, and a universal right-angle plate. If using the leveled surface plate method,
the amount of error is obtained by inserting gage blocks of known value between the right
angle knee plate and the lower vertical shoe of the frame. Then, insert a build up of gage
blocks between the knee plate and the upper vertical shoe of the frame until both shoes are
lightly touching the gage blocks. Perpendicularity as measured by the CMM or as the
difference between the two sets of gage blocks in the surface plate method is the total error
and shall be within the tolerance specified.
4.12 Bubble size. Bubble size shall be measured using a comparator with a
magnification of at least 3X. The comparator should contain a reticle calibrated scale to
the approximate size as a means to determine compliance. The bubble size shall be within
the size range specified at 75°F.
4.13 Workmanship. Workmanship of the M1A3 fire control quadrant shall be
confirmed in accordance with the verifications of MIL-F-13926.
5. PACKAGING
5.1 Packaging. For acquisition purposes, the packaging requirements shall be as
specified in the contract or order (see 6.2). When packaging of materiel is to be performed
by DoD or in-house contractor personnel, these personnel need to contact the responsible
packaging activity to ascertain packaging requirements. Packaging requirements are
maintained by the Inventory Control Point's packaging activities within the Military
Service or Defense Agency, or within the military service's system commands. Packaging
data retrieval is available from the managing Military Department's or Defense Agency's
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