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Anchor Rope

Twisted 3-strand white Nylon anchor rope and line. Sold by the metre with option to add hard eye splice at one end, and soft eye splice at the other end. Available from 10mm – 36mm diameters.

Nylon anchor rope is one of the most popular solutions for marine anchor lines thanks to its superior strength, stretch and shock absorbency. When in water, Nylon rope sinks, thereby avoiding other craft in crowded anchorages.

Suitable for boats, yachts, kayaks and jet-skis.

Key properties at a glance: 

  • Superior tensile strength
  • High shock absorption and elasticity
  • Excellent abrasion resistance 
  • Sinks
  • Good UV stability
  • Easy to splice
  • Made in Europe

Related: Nylon, Splicing, Thimbles, Polyester, Leaded Polysteel

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Anchor Rope Technical Details

Diameter / Weight / Break load 

Diameter Weight per 220m (kg) Break load (kg)*
6mm 4.5 809
8mm 8.2 1,408
10mm 12.5 2,162
12mm 18 3,070
14mm 25 4,080
16mm 32 5,294
18mm 40 6,559
20mm 50 8,078
22mm 61 9,588
24mm 73 11,424
28mm 99 15,198
32mm 129 19,584
36mm 163 24,480

*Break load for indication purposes only. Not test certified. Break loads will also lower as a result of splicing and knotting.

 

Which diameter should you choose?

As a general guide, you need approx 0.125″ (or 1/8″) of rope diameter for every 9 feet of boat. That’s 3.175mm for every 2.74m of boat.

(Note: when ordering anchor rope, bigger is normally better.)

To calculate the diameter: Boat Length (ft) ÷ 9 (ft) x 0.125 (inch) = Dia. (inch)

E.g.: for a 30ft boat: 30 ÷ 9 x 0.125 = 0.4″ (or 3/8″ )

The following table converts and then rounds up to the nearest diameters in mm.

Boat Length (ft) Diameter (inches) Diameter (mm)
9 0.125 (1/8″) 4mm
10 0.14 (1/8″) 4mm
15 0.21 (2/8″) 6mm
20 0.28 (2/8″) 8mm
30 0.42 (3/8″) 12mm
40 0.56 (4/8″)  14mm
50 0.69 (6/8″) 18mm
60 0.83 (7/8″) 22mm
70 0.97 (8/8″) 26mm
90 1.25 (1 & 2/8″) 32mm
100 1.39 (1 & 3/8) 36mm

 

How much rope do you need?

As a guide you should allow 8ft of line for every 1ft of water that you will be anchoring in as follows:

Anchorage Depth (ft) Length (ft) Length (m)
5 40 12
15 120 37
20 160 49
25 200 61
30 240  73
35 280 85
40 320 98