MIL-DTL-14824C(AR)
the band seat are removed. A test specimen having a one inch
gage length, and grip ends of sufficient length to accommodate
the tensile machine shall be removed from the blank and tested in
accordance with the procedure prescribed by ASTM Method E-8.
4.4.3.3 Band Seating
4.4.3.3.1 Tightness, non-destructive method. Five body
assemblies from each 1-hour production or fraction thereof per
banding machine in operation shall be subjected to this test.
Failure of one or more bands to comply with 3.6.3 shall be cause
for the rejection of the assemblies represented by the samples.
The samples provided by 4.4.3.3.1 shall be tested utilizing the
equipment and procedures described in drawing No. 9280429.
4.4.3.3.2 Tightness, destructive method. When the non-
destructive equipment is not available, one body assembly from
each regular production shift or fraction thereof from each
banding machine in operation shall be subjected to this test to
determine compliance with 3.6.3. Failure to comply shall be
cause for rejection of the assemblies represented by the failing
sample.
The body assembly selected should not be processed through
the machining line, although each band should have a light
surface cut to true up the surface prior to measuring. The
diameter of each band shall be measured on 3 locations, 60
degrees apart, on the points along the cylindrical portion of
their length, near the front and rear edges. This comprises 6
diametrical measurements per band. These points of measurement
shall be marked on the bands and on the projectile body adjacent
thereto in such a manner as to permit proper body and band
orientation after removal. The bands shall be measured at each
of the marked points (a total of 12 measurements) and the
diameter of the band seat corresponding to these points shall
also be measured. Add to each of the diameters of the band seat
the sum of the corresponding 2 thicknesses of the band; the
results obtained shall be subtracted from the previously
determined diameters over the band.
4.4.3.3.3 Sidewall contact. Rotating bands removed as
specified under 4.4.3.2 shall be examined to determine compliance
with 3.6.2 Failure to comply shall be cause for rejection of
assemblies represented by the sample. The samples shall be
sectioned by cutting through two planes normal to the
longitudinal axis one-half inch forward and rear of the rotating
band. The cylindrical portion containing the rotating band shall
be sectioned approximately in half through a plane parallel to
its longitudinal axis. One of the two halves shall be used for
establishment of mechanical properties of the band; the other
section shall be sectioned into two other parts, thus exposing
four surfaces each of which reveals a view of the band swaged
into the band seat. The exposed surfaces shall be subjected to a
light grinding operation to remove the metal smear effects of saw
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