MIL-DTL-87218E
4.2.4.1 Five year testing. Every 5 years, the manufacturer shall perform the following
tests:
a. Examination of product (see 4.4.1)
b. Elongation (see 4.4.3)
c. Concentricity (see 4.4.8)
4.2.4.2 At changes in processes or cladding material. Following any major change in
tooling, processing procedure or cladding material, the manufacturer shall perform the following
tests:
a. Examination of product (4.4.1)
b. Elongation (see 4.4.3)
c. Thermal expansion (see 4.4.4)
d. Concentricity (see 4.4.8)
4.2.5 Rejection and retest. The failure of any specimen during qualification testing shall
be cause for complete requalification of the type and class of lockclad experiencing failures.
4.3 Conformance inspection. Conformance inspection shall consist of individual tests
4.3.1 Individual test. Individual test shall consist of the following:
a. Examination of product (4.4.1).
4.3.2 Sampling plan. The sampling plan shall consist of the following:
a.
Breaking strength (4.4.2.1).
b.
Proof loading (4.4.5).
c.
Concentricity (4.4.8).
d.
Straightness (4.4.9).
4.3.2.1 Sampling. When conducting the tests specified herein, with the exception of
examination of product, samples of lockclad may be specially manufactured for qualification
testing and shall be taken from each lot to be delivered for conformance testing. Sample size for
each test shall be as specified in table III.
4.3.2.2 Lot. A lot shall consist of not more than 110 lockclad control cable assemblies or
110 pieces of lockclad material manufactured from the same manufacturer's lot of base wire rope
and manufactured continuously by one machine or by one series of progressive processing
machines. All items in a lot shall be of the same outside diameter cladding.
4.3.2.3 Specimen. A specimen is a lockclad assembly or portion of an assembly or
lockclad material taken for the performance of a testing method. All specimens for qualification
testing shall be taken from the same lot for each particular size. All specimens for conformance
testing shall be taken from the lot to be delivered on a specific contract.
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