ISO 2020-1-1997 pdf free.Aerospace- Preformed flexible steel wirerope for aircraft controls.
This part of lSO 2020 specifies the requirements which shall be satisfied by preformed flexible steel wire ropes foraircraft controls. The wire ropes shall be capable of operation within the temperature range of -54°C to +121 ℃.
The following standards contain provisions which, through reference in this text, constitute provisions of this part ofISO 2020.At the time of publication, the editions indicated were valid.All standards are subject to revision, andparties to agreements based on this part of lSO 2020 are encouraged to investigate the possibility of applying themost recent editions of the standards indicated below.Members of IEC and lS0 maintain registers of currently validlnternational Standards.
For the purposes of this part of lSO 2020,the definitions and designations given in lISO 2408, IS0 2532 andISo 3578 apply.
The nominal wire diameters necessary for the manufacture of ropes shall be specified by the ropemaker. The limitdeviations given in table 1 apply to the diameters of the finished wire.The minimum values of the mass per unit area of zinc coating for carbon steel wire shall conform to the valuesgiven in table 2.Wire ropes covered by this part of lSO 2020 are of the two types of construction shown in table 5.
6.1.1 7x 7 construction
This type of wire rope shall be composed of six outer strands each of seven wires laid in a right-hand directionaround a steel centre strand of seven wires.
The steel centre strand shall be composed of a layer of six wires laid in a right-hand direction around a core or kingwire. lt shall be of sufficient diameter to give full support to the outer strands.
The six outer strands shall be composed of a layer of six wires laid in a left-hand direction around a core or king wire.The lengths of lay shall be as follows:
a)the six outer strands shall be laid around the steel centre strand with a length of lay between six and eight times
the nominal diameter of the rope;
b)the lengths of lay of six wires of the steel centre strand and of the outer strands shall not exceed 60 % of the
length of lay of the rope.6.1.2 7×19 construction This type of wire rope shall be composed of six outer strands each of 19 wires laid in a right-hand direction arounda steel centre strand of 19 wires.
The steel centre strand shall be composed of a first layer of six wires laid in a right-hand direction around a core orking wire, and a second layer of 12 wires laid in a right-hand direction. It shall be of sufficient diameter to give ftllsupport to the outer strands.
The six outer strands shall be composed of a first layer of six wires and a second layer of twelve wires laid in a lef.hand direction around a core or king wire.ISO 2020 pdf download.
ISO 2020-1-1997 pdf free
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