MIL-DTL-18375H
3.3.3.1 Construction 7 x 7. Wire rope of this construction shall consist of 6 outer strands
of 7 wires each laid around a core strand (see 6.4.2) of 7 wires. The 6 outer strands shall each
consist of a layer of 6 wires laid around a center wire (see 6.4.1) in a left-hand direction. The
core strand shall consist of a layer of 6 wires laid around a center wire in a right-hand direction.
The 6 outer strands shall be laid around the core strand in a right-hand direction. The length of
percent of the lay of the finished wire rope. The length of the lay of the finished wire rope shall
be not more than 8 or less than 6 times the normal rope diameter.
3.3.3.2 Construction 7 x 19. Wire rope of this construction shall consist of 6 outer
strands of 19 wires each laid around a core strand of 19 wires. The 6 outer strands shall each
consist of an inner layer of 6 wires laid around a center wire in a left-hand direction and an outer
layer of 12 wires laid over the inner layer of 6-wire layer in a left-hand direction. The core
strand shall consist of an inner layer of 6 wires laid around a center wire in a right-hand direction
and an outer layer of 12 wires laid over the inner 6-wire layer in the right-hand direction. The 6
outer strands shall be laid around the core strand in a right-hand direction. The length of lay of
the inner 6-wire layer in each of the 7 strands shall not exceed 60 percent of the lay of the outer
12-wire layer. The length of lay of the outer 12-wire layer in each of the 7 strands shall not
exceed 50 percent of the lay of the finished wire rope. The length of lay of the finished wire
rope shall be not more than 8 times or less than 6 times the nominal wire rope diameter.
3.4 Performance.
3.4.1 Breaking strength. The wire rope shall have the minimum breaking strength
3.4.2. Endurance. The wire rope shall be capable of withstanding the respective tension
load and number of reversals shown in table II without failure. The breaking strength of the wire
rope after the endurance test shall be not less than specified in table II.
3.4.3 Stretch limits. The wire rope shall not stretch more than 1.5 percent under a load
equal to 60 percent of the applicable MBS shown in table I.
3.4.4 Ductility of steel. Wire shall not fracture when wrapped in accordance with 4.5.5
prior to wire rope fabrication.
3.4.5 Test load. The wire rope shall be capable of carrying 80 percent of its respective
MBS load shown in table I without any failures of the individual wires in the rope.
3.4.6 Magnetic permeability. The magnetic permeability of the wire rope shall not
exceed 1.5 in a magnetic field of 200 oersteds.
3.4.7 Operating range. The wire rope shall be capable of operation in wind, dust, fuel,
and oil spills, wash-down and other aircraft environmental stresses and experiences within a
-65 °F to +250 °F (-54 °C to +121 °C) temperature range.
4
For Parts Inquires submit RFQ to Parts Hangar, Inc.
© Copyright 2015 Integrated Publishing, Inc.
A Service Disabled Veteran Owned Small Business