Rope Characteristics

Ultrex is a single braid rope of 100% Dyneema SK75 fiber with our Maxijacket coating for superior abrasion resistance. Dyneema has less tendency to creep than other ultra high molecular weight polyethylene fibers. It also has better efficiency as evidenced by the breaking strengths of the larger diameters. Ultrex has better bend over sheave resistance than other high modulus fiber ropes. Dyneema has zero water absorption and maintains its flexibility even in freezing conditions.

Specific Gravity: 0.98


 
Diam. Inches Average Break Strength Pounds Minimum Break Strength Pounds Max Working Load 5:1 Weight Pounds per 100 ft.
3/8 20,000 18,000 4,000 3.25
7/16 25,700 23,130 5,140 4.30
1/2 37,400 33,660 7,480 5.90
9/16 45,000 40,500 9,000 7.10
5/8 53,000 47,700 10,600 8.90
3/4 75,000 67,500 15,000 13.00
7/8 98,000 88,200 19,600 18.20
1 120,000 108,000 24,000 22.30
1-1/8 148,000 133,200 29,600 31.50
1-1/4 172,000 154,800 34,400 35.90
1-5/16 184,000 165,600 38,800 41.50
1-1/2 230,000 207,000 46,000 51.80
1-5/8 285,000 256,500 57,000 65.30
1-3/4 330,000 297,000 66,600 77.90
2 390,000 351,000 78,000 91.50

Elastic Elongation

The coloured area under the curve represents the rope’s energy absorption capability.

Green working 404 ft. lbs/lb
Red ultimate 6,188 ft. lbs/lb.

Ultrex is made in accordance with Yale specification #YCI-UX-006