MIL-DTL-87218E
3.3 Design and construction.
3.3.1 Design. MIL-HDBK-1599, Requirement 206 should be used as guidance for the
application and installation of the lockclad cable.
3.3.2 Construction.
3.3.2.1 Base wire rope construction. Construction of base wire rope shall be in
accordance with MIL-DTL-83420.
3.3.2.2 Lockclad diameter. The aluminum tubing shall be uniformly cold worked
(swaged) over the base wire rope to the dimension specified in table I and sufficiently to meet the
performance requirements herein. Tolerance of the outside diameter of the lockclad after swaging
shall be as specified in table I.
3.3.2.3 Lockclad concentricity. The cladding after swaging shall be concentric around
the base wire rope such that the thickness of the clad material does not vary more than 10 percent
around the circumference of the base wire rope.
3.3.2.4 Cladding placement. The length, location, and length tolerances of cladding on a
base wire rope length shall be as specified on the lockclad control cable assembly drawing or
MS sheet. Sections of lockclad which are not separated on the control cable assembly drawing
or MS sheet shall be one continuous section of aluminum tubing as opposed to two or more
sections. Relative to lockclad control cable assemblies which include sections of bare base wire
rope (see 6.4.1), the after swage lengths of cladding must be determined prior to swaging. Once
cladding has been swaged, it shall not be stripped from base wire rope under any circumstances
or in any amount.
3.3.2.5 Lockclad straightness. The lockclad assembly shall be straight within 0.062 inch
for each 5 feet of length when the lockclad assembly is loaded to 10 percent minimum breaking
strength (MBS) (see 6.4.7) of the base cable. The MBS shall be in accordance with MIL-DTL-
83420.
3.3.2.6 Terminal Swaging. When cable assemblies require installation of terminals
conforming to MIL-DTL-781, swaging of the terminals shall be accordance with MIL-DTL-
6117.
3.4 Performance.
3.4.1 Breaking strength. The cladding of lockclad shall not be considered to be additive
to the MBS of the base wire rope (see 6.4.2) whether terminals are swaged to the base wire rope
or directly to the cladding. The MBS for the base wire rope is specified in MIL-DTL-83420.
Lockclad assemblies shall be tested for ultimate tensile strength per MIL-DTL-6117.
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