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Lockline

Lockman® 3-Strand Twisted

Polyester 12-strand braided ropeDesigned for lighter locking, Lockman® is manufactured with a spun and filament blend polyester cover over a strand core of monofilament polypropylene. The lay of the rope is medium-soft to optimize tensile strength. The fuzzy softness of polyester cover yarns serves to diffuse heat buildup and offers excellent abrasion resistance. Lockman® is available with a high-tenacity co-polymer core upon request.

Lockman® Specifications
Dia. Inch Size mm Circ. Linear Density Weight 600' Average Tenacity Lbs. Average Tenacity Kgs. Reel Coil
1-1/2" 36 4-1/2" 44.6 267.3 37,980 17,227 R8902 E0749
1-5/8" 40 5" 54.6 327.8 44,640 20,248 R3041 E1363
1-3/4" 44 5-1/2" 60.4 362.5 50,572 22,939 R3039 E0568
2" 48 6" 77.9 467.4 61,180 27,751 R3040 E0991
2-1/2" 60 7-1/2" 106.4 638.4 92,120 41,785 R8930 E1029
2-5/8" 64 8" 115.9 695.4 101,990 46,262 R8931 E1585

Lubelock® 3-Strand Twisted

Lubelock ropeDesigned for medium and heavy locking, Lubelock® has a cover of 100% fuzzy DuPont® T-77 multiplex Dacron® fiber. The core of each strand is 100% high strength SuperPro® co-polymer with a proprietary lubricant added to improve rendering. As tension is put on the rope, the lubrication migrates to the strand surface, decreasing fiber on fiber friction resulting in less heat build up.

The co-polymer core and beefy multiplex polyester cover give Lubelock® superior tenacity. This enables the rope to be built with a firm lay to further improve abrasion resistance. Lubelock® is engineered to have all the right stuff: balance, tenacity, long working life, and ease of use.

Lubelock® Specifications
Dia. Inch Size mm Circ. Linear Density Weight 600' Average Tenacity Lbs. Average Tenacity Kgs. Reel Coil
1-1/2" 36 4-1/2" 46.9 281.4 43,200 19,142 R8932 E1586
1-5/8" 40 5" 57.5 345.0 49,600 22,498 R8933 E1587
1-3/4" 44 5-1/2" 63.6 381.6 53,800 24,403 R8934 E1588
2" 48 6" 82.0 492.0 66,500 30,164 R8935 E1362
2-1/2" 60 7-1/2" 112.0 672.0 98,000 44,452 R8936 E1589
2-5/8" 64 8" 122.0 732.0 108,500 49,215 R8937 E1590

TENSILE STRENGTHS are determined from tests on new, unused rope in accordance with standard test methods of the Cordage Institute.

For freight information or to order Email or call Jay @ 763-263-9835.

CAUTION: USE OF WORKING LOADS

Because of the wide range of rope use, rope condition, exposure to the several factors affecting rope behavior, and the degree of risk to life and property involved, it is impossible to make blanket recommendations as to working loads. However, to provide guidelines, working loads are tabulated for rope in good condition with appropriate splices, in non-critical applications and under normal service conditions.

The Cordage Institute Formula for working load is:
Working Load = Minimum Breaking Strength/Safety Factor

A higher working load may be selected only with expert knowledge of conditions and professional estimate of risk. Also, if the rope has not been subject to dynamic loading or other excessive use, has been inspected and found to be in good condition, is to be used in the recommended manner; if the application does not involve elevated temperatures, extended periods under load, or obvious dynamic loading (see explanation below) such as sudden drops, snubs or pickups. For all such applications and for applications involving more severe exposure conditions, or for recommendations on special applications, call Jay at 612-282-4035.

**Many uses of rope involve serious risk of injury to personnel or damage to valuable property. This danger is often obvious, as when a heavy load is supported above one or more workmen. An equally dangerous situation occurs if personnel are in line with a rope under tension. Should the rope fail, it may recoil with considerable force. Persons should be warned against the serious danger of standing in line with any rope under tension. IN ALL CASES WHERE SUCH RISKS ARE PRESENT, THERE IS ANY QUESTION ABOUT THE LOADS INVOLVED OR QUESTIONS ABOUT THE CONDITIONS OF USE, THE WORKING LOAD SHOULD BE SUBSTANTIALLY REDUCED AND THE ROPE PROPERLY INSPECTED.

DYNAMIC LOADING VOIDS NORMAL WORKING LOADS

Normal working loads are not applicable when the rope is subject to significant dynamic loading. Whenever a load is picked up, stopped, moved or swung there is an increased force due to dynamic loading. The more rapidly or suddenly such actions occur, the greater the increase will be. In extreme cases, the force put on the rope may be two, three or even more times the normal involved. Examples could be picking up a tow on a slack line or using a rope to stop a falling object. Therefore, in all such applications such as towing lines, lifelines, safety lines, climbing ropes, etc. working loads as given DO NOT APPLY.

Users should be aware that dynamic effects are greater on a low elongation rope such as polyester than on a high elongation rope such as nylon, and greater on a shorter rope than on a longer one. The working load ratios listed contain provision for very modest dynamic loads. This means, however, that when this working load has been used to select a rope, the load must be handled slowly and smoothly to minimize dynamic effects and avoid exceeding the provision for them.

EFFECT OF TEMPERATURE ON TENSILE STRENGTH

The tensile strength charts apply to ropes tested at normal room temperature (70°F). Ropes have lower tensile strengths at higher temperatures. 30°F (or more) lower at the boiling point of water (212°F) and continuing on down to zero strengths for nylon and polyester at 490°F and 300°F for polypropylene.

Also, continued exposure at elevated temperatures causes permanent damage. TENSILE STRENGTHS shown are average based on new ropes tested under laboratory conditions, minimum can vary by 10%.