MIL-DTL-29606A
6.5.6 Circumferential non-uniformity. Circumferential non-uniformity is a measurement
that represents coating thickness inconsistency around the circumference of conductor strands.
It is inspected using a cross section of stranded conductor material and measuring at the location
where the distance between the generally smooth, outer coating surface and the copper substrate
is most thin. Local anomalies (scratches, etc.) that may further reduce the coating thickness
below the generally smooth outer surface are ignored for this measurement. Measurement of
this characteristic and statistical tracking over time is intended to improve coating uniformity, to
reduce the occurrence of thin coating on one side and thickened coating opposite. Ideally, the
coating is uniformly thick all around so that this measurement is close to the average coating
thickness targeted for the product.
6.5.7 Local minimum coating thickness. The local minimum coating thickness is a
measurement that represents localized phenomena which reduce coating thickness. It is
inspected using a cross section of stranded conductor material and measuring at the location
where the coating is most thin. Local anomalies (scratches, etc.) that reduce the coating
thickness below the generally smooth outer surface must be considered for this measurement.
Measurement of this characteristic and statistical tracking over time is intended to reduce the
occurrence of locally thinned coating. Ideally, there are few local coating thickness reductions
viewable for measurement and they do not penetrate deep into the coating.
6.6 Subject term (key word) listing.
Concentric
Conductor
Rope lay
Stranding
6.7 Changes from previous issue. Marginal notations are not used in this revision to
identify changes with respect to the previous issues due to the extent of the changes.
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