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STEEL WIRE ROPE

WIRE ROPE CONSTRUCTION AND LAY
    A wire rope is much more than a collection of wires. It is composed of wire strands and core ---- A certain number of wires are laid helically into wire strand and then several strands are closed helically together into a wire rope. See the drawing bellow and get clear the wire, wire strand and core in the construction of wire rope.

   The most common construction of a wire rope consists of 6 strands laid helically around a Fibre Core (FC) or an Independent Wire Rope Core (IWRC). For example: seven steel wires laid helically into a 1 X 7 strand, and then six 1 X 7 strands laid helically around a fibre core is called a 6 X 7 + FC steel wire rope. The core of wire rope varies from Fibre Core, PP (polypropylene) Core, Strand Core, and Independent Wire Rope Core. So we have the rope construction like 6 X 7 + FC, 7 X 7, 6 X 19 + FC, 7 X 19, 6 X 37 + FC, 6 X 37 + IWRC (Independent Wire Rope Center - usually a 7 X 7 steel wire rope), etc.
   The lay of a rope helically counterclockwise is called right hand regular (ordinary) lay, or clockwise is called left hand regular (ordinary) laid. All ropes are right hand regular (ordinary) lay unless otherwise stated.

COMMONLY USED STEEL WIRE ROPE
Preformed acc. to FS - RR - W - 410D
6 X 19 & 6 X 37 Classification (6 X 19, 6 X 19S, 6 X 25F , 6 X 37, 6 X 36WS)

Dia.

Approx. Weight Per Ft./Pounds

Min. Breaking Strength Net Tons

Inch

mm

Fibre Core

IWRC

Fibre Core

IWRC

3/16

4.76

0.059

0.065

1.55

1.67

1/4

6.35

0.105

0.116

2.74

2.94

5/16

7.94

0.164

0.180

4.26

4.58

3/8

9.53

0.236

0.260

6.10

6.56

1/2

12.7

0.42

0.46

10.7

11.5

5/8

15.88

0.66

0.72

16.7

17.9

3/4

19.05

0.95

1.04

23.8

25.6

7/8

22.23

1.29

1.42

32.2

34.6

1

25.4

1.68

1.85

41.8

44.9

1-1/8

28.58

2.13

2.34

52.6

56.6

1-1/4

31.75

2.63

2.89

64.6

69.4

The relevant DIN specification is available and cited as follows:
Nominal Tensile Strength 1770N/mm 2
Zinc Coating to DIN2078
DIN3053 – 1 x 19, Dia. 1.5mm, 2.0mm, 2.5mm, 3.0mm, 4mm, 6mm, 8mm
DIN3055 – 6 x 7 + FC, (7 x 7), Dia. 2mm, 3mm, 4mm, 6mm, 8mm, 10mm
DIN3051 – 6 x 12 + 7FC, Dia. 4mm, 6mm, 8mm, 10mm, 12mm
DIN3060 – 6 x 19 + FC, (7 x 19), Dia. 4mm, 6mm, 8mm, 10mm, 12mm, 14mm, 16, 18mm, 20mm
DIN3058 – 6 x 19Seale + FC, (6 x 19Seale + IWRC), Dia. 6mm, 8mm, 10mm, 12mm, 14mm, 16mm, 18mm, 20mm
DIN3057 – 6 x 19Filler + FC, (6 x 19Filler + IWRC), Dia. 6mm, 8mm, 10mm, 12mm, 14mm, 16mm, 18mm,20mm
DIN3064 – 6 x 36WS + FC, (6 x 36WS + IWRC), Dia. 12mm, 14mm, 16mm, 18mm, 20mm, 22mm, 24mm, 26mm
DIN3066 – 6 x 37 + FC, (6 x 37 + IWRC), Dia. 6mm, 8mm, 10mm, 12mm, 14mm, 16mm, 18mm, 20mm, 22mm, 24mm, 26mm, 28mm, 30mm

   
   
   
   
   
     
     
     
     
     
     
     
     
     
     
     
     
     
     
     
     
     
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