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|  MIL-C-18087A(SH)
procedures for welding, brazing, and allied processes shall conform to
MIL-STD-278.
4.5.4 Castings.
Castings shall be inspected in accordance with MIL-STD-278.
4.5.5 Measures ent of critical fits.
Critical fits shall be measured to
assure satisfactory installation.
4.5.5.1 RHR. Hub and sleeve tooth surfaces shall be inspected in accordance
with ANSI B46.1 to assure that they conform to the tooth finish specified.
4.5.5.2 Weight. The first article shall be weighed. Any change of weight
or center of gravity which will result in more than a 5 percent increase in weight
or change to the center of gravity during the design stage shall be reported as
soon as it is known.
4.6 Tests.
4.6.1 Nondestructive tests of metals.
Nondestructive tests shall conform to
MIL-STD-271.
4.6.1.1 Ultrasonic and radiograph ic tests, Castings and forgings shall be
ultrasonically or radiographically tested in accordance with MIL-STD-271.
Ultrasonic testing shall be in both radial and longitudinal directions using
either a shear or longitudinal wave, depending on the geometry of the item.
sleeves, and all shafts shall be subjected to inspection by the magnetic
particle or liquid penetrant method in accordance with MIL-STD-271. Nonmagnetic
material shall be subjected to inspection by the liquid penetrant method.
4.6.1.2.1 Residual magnetism. Residual magnetism of magnetic parts after
finish machining and demagnetization following magnetic particle inspection shall
not exceed 10 gauss.
4.6.1.3 Tooth hardness. surface hard ened material. Tooth hardness shall be
determined by the contractor's method in accordance with 4.6.1.4, but shall
not cause damage to or upset metal in teeth.
4.6.1.4 Case depth. case and core hardness. Case depth and case hardness of
surface hardened teeth shall be determined from a coupon piece or lug obtained
from the same heat and lot as the actual clutch part. The coupon piece or lug
shall have been processed together with the clutch part through the complete
heat-treat cycle. Determination of surface hardness and case depth shall take
account of effects of final machining or other processes used to achieve the final
tooth profile in the case hardened regions. Core hardness shall be determined on
the actual parts. Readings shall be taken by contractor's method but shall not
damage or upset metal in clutch teeth. No measurements are to be taken on active
surfaces of teeth.
4.6.2 Tooth contact check. Clutches which use dental type tooth connections
shall be checked for tooth contact to determine conformance to 3 4.7.11.
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