 |
|||
|
|
|||
| ||||||||||
|
|  MIL-D-63303B(AR)
3.8.4 Threaded parts or devices. Screws, pins, nuts and bolts
shall show no evidence threading, nutilation, detrimental
burrs or loss of tightness. Tightness means that the screw shall be
firmly secured without damage or injury to screw, bolt and threads
and that there shall be no relative movement possible between the
attached parts.
3.8.5 Welding. The surfaces of parts to be welded shall be
free from rust, scale, paint, grease and other foreign matter other
than mill scale that can be removed by chipping and wire brushing.
All welds shall be free of harmful defects such as cracks, porosity,
undercuts, voids and gaps. There shall be no burn through. Fillets
shall be uniform and smooth. Parts to be joined by fillet welds
shall be brought into as close contact as possible and in no event
shall be separated by more than 0.1875 inch (4.76mm), unless
approved bridging techniques are used. Angular or thickness
misalignment, warpage, or dimensional change due to heat from the
welding operation shall be within permitted tolerances. There shall
be no damage to adjacent parts resulting from the welding.
Straightening of material before or after welding shall be done by
methods that will not cause weakening or injury to the dispenser.
Welds shall transmit stress without permanent deformation or failure
when the parts connected by the welds are subjected to test proof
and service loading. Parent materials, weld filler metals, and
fabrication techniques shall be required to enable the dispenser to
conform to the examination and test requirements specified in
Section 4.
3.8.6 Brazing. All brazed joints shall be in accordance with
MIL-B-7883, Brazing of Stainless, Copper, Copper Alloys, etc, and
shall be of ample size to meet the individual requirements of the
parts concerned.
3.8.7 Solderinq. Only class Sn60 or Ns63 solder in accordance
with QQ-S-571 shall be used for electrical connections. Soldering
processes shall conform to the requirements specified in MIL-S-45743
and MIL-STD-275, Printed Wiring. The soldering shall be free from
scratches roughness, sharp edges, dullness, looseness, blistering,
foreign matter and other evidence of poor workmanship that will
render the assemblies unsuitable for the purposes intended. Defects
in quality of workmanship as detailed in MIL-S-45743 shall be
considered as failure at-some point in the process and one in which
the part shall be rejected unless it can be-reworked prior to final
inspection.
3.8.8 Bearinq assemblies. Bearing assemblies shall be free
from rust, discoloration, and imperfections of ground, honed, or
lapped surfaces. Contacting surfaces shall be free of tool marks,
gouge marks, nicks, or other surface-type defects. There shall be
no detrimental interference, binding, or galling.
18
|
|
Privacy Statement - Press Release - Copyright Information. - Contact Us |
Click
here for thousands of PDF manuals