WIRE ROPE SLINGS

Dawson Group Steel Wire Rope And Wire Rope Slings have approved by ABS、BV、CCS、DNV、KR、LR、RINA etc. and has most competitive price !

Any requirement, please contact us: info@dawson-group.com

General Information on Wire Ropes

Wire rope is made of plaiting strands of wire – normally medium carbon steel – into a thick cable. The strands are formed around a core. The strands in wire ropes are made of wore twisted together. Strands with smaller diameter wires are less abrasion resistant and more fatigue resistant. Strands made with thicker length of wore are more abrasion resistant and less fatigue resistant.

Construction

The main components of a wire rope is shown below

In the above example, each individual wire is arranges around a central wire to form a 7-wire strand.

Six of these strands are formed around a central core to make a wire rope. The rope is specified as 6x7 (6/1)

–i.e. six strands each of seven wires.

Build a wire rope lifting sling to your specification with a wide choice of styles and fittings.

Wire Rope and Wire Rope Slings for Lifting which Conform to EN13414-1
 

Dawson wire rope slings comply with the Supply of Machinery (Safety) Regulations. Wire rope fittings and steel rope are matched up against each other to suit the required load. They go through thorough quality assurances and are clearly labelled to maximise safety. Slinging arrangements are made up to order, in accordance with your specifications.

End Fittings
 

Various end fittings and end fitting combinations are available for online quotation, where you can choose the complete configuration of the sling that you require. If you require any additional features such as fibre core, or the construction of the wire e.g. 6x36 IWRC, please add this into the additional information box at the end of constructing your wire ropes.

Ending Types

Please see the image below for letter references, the end fitting choices which are choices on the buy/quote tab are as follows.

• 

  A - Fused and tapered.
• B - Ferrule secured thimble hard eye.
• C - Ferrule secured soft eye.
• D - Flemish eye according to Din 13414-1.
• E - Captivated shackle (permanent).
• F - Master Ring.
• G - Safety hook.
• H - Self-locking hook.
• I - Foundry hook.
• J - Swivel safety hook.
• K - Swivel Self-locking hook.

Maximum Safe Working Loads with Different Slinging Methods

EN 13414-1 Table 4 - Working load limits for slings using steel cored rope of classes 6x19, 6x36 and 8x36.

Nominal rope Ø	Safe Working Load (tonnes)
	1 Leg	2 Leg		3 Leg and 4 Leg		Endless
		Up to 45°	45° to 60°	Up to 45°	45° to 60°
8mm	0.750	1.05	0.750	1.55	1.10	1.20
9mm	0.950	1.30	0.950	2.00	1.40	1.50
10mm	1.15	1.60	1.15	2.40	1.70	1.35
11mm	1.40	2.00	1.40	3.00	2.12	2.25
12mm	1.70	2.30	1.70	3.55	2.50	2.70
13mm	2.00	2.80	2.00	4.15	3.00	3.15
14mm	2.25	3.15	2.25	4.80	3.40	3.70
16mm	3.00	4.20	3.00	6.30	4.50	4.80
18mm	3.70	5.20	3.70	7.80	5.65	6.00
20mm	4.60	6.50	4.60	9.80	6.90	7.35
22mm	5.65	7.80	5.65	11.8	8.40	9.00
24mm	6.70	9.40	6.70	14.0	10.0	10.6
26mm	7.80	11.0	7.80	1.50	11.5	12.5
28mm	9.00	12.5	9.00	19.0	13.5	14.5
32mm	11.8	16.5	11.8	25.0	17.5	19.0
36mm	15.0	21.0	15.0	31.5	22.5	23.5
40mm	18.5	26.0	18.5	39.0	28.0	30.0
44mm	22.5	31.5	22.5	47.0	33.5	36.0
48mm	26.0	37.0	26.0	55.0	40.0	42.0
52mm	31.5	44.0	31.5	66.0	47.0	50.0
56	36.0	50.0	36.0	76.0	54.0	58.0
60	42.0	58.0	42.0	88.0	63.0	67.0
leg factor KL	1	1.4	1	2.1	1.5	1.6

EN 13414-1 Table 3 - Working load limits for slings using fibre cored rope of classes 6x19, 6x36 and 8x36.

Nominal rope Ø	Safe Working Load (tonnes)
	1 Leg	2 Leg		3 Leg and 4 Leg		Endless
		Up to 45°	45° to 60°	Up to 45°	45° to 60°
8mm	0.700	0.950	0.700	1,50	1,05	1,10
9mm	0.850	1.20	0.850	1,80	1,30	1,40
10mm	1.05	1.50	1.05	2,25	1,60	1,70
11mm	1.30	1.80	1.30	2,70	1,95	2,12
12mm	1.55	2.12	1.55	3,30	2,30	2,50
13mm	1.80	2.50	1.80	3,85	2,70	2,90
14mm	2.12	3.00	2.12	4,35	3,15	3,30
16mm	2.70	3.85	2.70	5,65	4,20	4,35
18mm	3.40	4.80	3.40	7,20	5,20	5,65
20mm	4.35	6.00	4.35	9,00	6,50	6,90
22mm	5.20	7.20	5.20	11,0	7,80	8,40
24mm	6.30	8.80	6.30	13,5	9,40	10,0
26mm	7.20	10.0	7.20	15,0	11,0	11,8
28mm	8.40	11.8	8.40	18,0	12,5	13,5
32mm	11.0	15.0	11.0	23,5	16,5	18,0
36mm	14.0	19.0	14.0	29,0	21,0	22,5
40mm	17.0	23.5	17.0	36,0	26,0	28,0
44mm	21.0	29.0	21.0	44,0	31,5	33,5
48mm	25.0	35.0	25.0	52,0	37,0	40,0
52mm	29.0	40.0	29.0	62,0	44,0	47,0
56mm	33.5	47.0	33.5	71,0	50,0	54,0
60mm	39.0	54.0	39.0	81,0	58,0	63,0
leg factor KL	1	1,4	1	2,1	1,5	1,6

Working Load Limits & Safe Working Loads

The working load limits of slings made from general engineering ropes to BS EN 12385-4 should conform to BS EN 13414-1: 2003. Note that the working load limits shown are based on the assumption that soft-eyes of single-part slings are used over bearing points of not less than twice the normal diameter of the rope. All sling ropes must be ordinary lay.

The Safe Working Load will normally be equal to the Working Load Limit but in some circumstances it may be less e.g. If the sling is used in choke hitch SWL=WLL x 0.8.

BS EN 13414-1 covers only those sling assemblies that have legs of equal nominal length, diameter, construction and tensile grade. While sling assemblies with legs of unequal length may be made up generally in accordance with the requirements of BS EN 13414-1, it must be stressed that their rating requires special consideration by a competent person.

Caution

In all cases, where hooks or shackles are used, the WLL of the hooks and shackles shall never be less than the WLL of the leg which they are fitted to.

Safety recommendations

When using multi-leg sling assemblies, remember that increasing the angles between the legs will increase the load in each leg. Examine all slings before use, and discard any that are defective. Slings which are found to be unfit for use should be destroyed by cutting them up - not put on a refuse dump. ‘Hooking back’ to the leg of a sling is not recommended. The Safe Working Load of slings is affected by the method of usage. Check that the crane hook is positioned over the loads centre of gravity to prevent swinging when the load is being raised. Correct signals, according to the recognised code, should be given to the crane driver. The signals must be given by the person responsible for the lift and nobody else.

Keep the wire rope sling away from welding and flame cutting operations. The Law requires that all lifting tackle must be examined by a competent person at regular intervals. Users should not store away slings and regard them as their own private slinging assemblies, as this could lead to them being overlooked at inspection time

Terminations

The end of a wire rope tends to fray readily, and cannot be easily connected to plant and equipment. A number of different mechanisms exist to secure the ends of wire ropes to make them more useful. The most common and useful type of end fitting for a wire rope is when the end is turned back to form a loop. The loose end is then fixed by any number of methods back to the wire rope.

Thimbles (If you are interesting ,please click)

When the wire rope is terminated with a loop, there is a risk that the wire rope can bend too tightly, especially when the loop is connected to a device that spreads the load over a relatively small area. A thimble can be installed inside the loop to preserve the natural shape of the loop, and protect the cable from pinching and abrasion on the inside of the loop. The use of thimbles in loops is industry best practice. The thimble prevents the load from coming into direct contact with the wires.

Wire rope clamps (If you are interesting ,please click)

A wire rope clamp, also called a clip, is used to fix the loose end of the loop back to the wire rope. It usually consists of a u-shaped bolt, a forged saddle and two nuts. The two layers of wire rope are placed in the u-bolt. The saddle is then fitted over the ropes on to the bolt (the saddle includes two holes to fit to the u-bolt). The nuts secure the arrangement in place. Three or more clamps are usually used to terminate a wire rope.

Swaged terminations

Swaging is a method of wire rope termination that refers to the installation technique. The purpose of swaging wire rope fittings is to connect two wire rope ends together, or to otherwise terminate one end of wire rope to something else. A mechanical or hydraulic swager is used to compress and deform the fitting, creating a permanent connection. There are many types of swaged fittings. Threaded Studs, Ferrules, Sockets, and Sleeves a few examples.

Sockets (If you are interesting ,please click)

A socket termination is useful when the fitting needs to be replaced frequently. For example, if the end of a wire rope is in a high-wear region, the rope may be periodically trimmed, requiring the termination hardware to be removed and reapplied. An example of this is on the ends of the drag ropes on a dragline. The end loop of the wire rope enters a tapered opening in the socket, wrapped around a separate component called the wedge. The arrangement is knocked in place, and load gradually eased onto the rope. As the load increases on the wire rope, the wedge become more secure, gripping the rope tighter.

Eye splice