MIL-DTL-22442G
4.5.6 Pull and twist test. The cable assembly pull test shall consist of the twist test (4.5.6.1)
followed by the pull test (4.5.6.2).
4.5.6.1 Twist test. The twist test shall be applicable to all ends of the cable assembly that
are terminated with a connector only. Each connector shall be secured in a holding device in
such away that it cannot rotate. The twist shall be applied about the axis of the cable to cause a
point on the cable three inches from the connector to twist 180 degrees from the starting position
and be held there for 30 seconds. The cable shall then be twisted in the opposite direction such
that the point on the cable has twisted 180 degrees past the original starting position, and be held
there for 30 seconds.
4.5.6.2 Pull test. The pull test shall be applied to all terminals, connectors, switch
assemblies, and taper pins. The component of the cable assembly to be tested shall be secured in
a stationary holding device and the cable gripped six to twelve inches from the component of the
cable assembly under test. If the cable assembly is too short to grip six to twelve inches from the
component it may be gripped closer. The grips shall not slip or damage the cable during the test.
The static force shall be applied for 30 seconds with the force values specified as follows.
4.5.6.2.1 Terminals. Terminals soldered to circular conductors shall be subjected to 5
pounds minimum pull. Terminals crimped to circular conductors shall be subjected to 3 pounds
minimum pull. Contacts as part of the connector shall not be considered a terminal.
4.5.6.2.2 Taper-pins. Taper-pins inserted into a connector shall be subjected to a pull of
3 pounds minimum at the taper-pin connector connection.
4.5.6.2.3 Connectors. A pull force of 20 ±2 pounds shall be applied. If the connector is
potted or molded 30 ±2 pounds shall be applied.
4.5.6.2.4 Switch assembly. The switch assembly shall be securely mounted and a 20 ±2 lb
force shall be applied to the connecting cables. The cable assembly shall meet the requirements
of 3.5.4.
4.5.7 Bend relief flexibility. Each bend relief in the cable assembly shall be manually
subjected to 30 continuous flexure cycles, at room temperature, through a 180 degree arc, at
approximately 30 cycles per minute. Each bend relief shall be held in a mechanical device so
that the portion of the cable entering the bend relief flexes when the cable is flexed. The bend
relief is free to flex with the cable in one direction through 90 degrees from the axially in-line
starting position, back to the starting position, then through 90 degrees in the opposite direction,
and return to the starting position. The flexing procedure shall be repeated for 30 cycles in a
plane 90 degrees axially to the plane of initial flexing.
4.5.7.1 "Y" junction/crotch flexibility. Each cable assembly that contains a
"Y" junction/crotch shall be tested for flexibility and continuity as follows:
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