THIMBLE
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The function of the wire rope thimble is to connect other components and tie around the end of the rope to prevent excessive bending and abrasion. It is an important part of the wire rope sling.
1) the thimble should be smooth and flat, there should not be any damage to the wire rope cracks, defects, sharp edges and surface roughness, and inequality defects. The tip of the thimble should be free to fit the wire rope, and the tip part should be cut short to half of the groove depth.
2) the surface of the thimble should be hot dipped galvanized, and it should be smooth and flat, there should be no defects such as leakage, zinc particles, bubbles, and cracks, and the galvanized layer should have sufficient adhesion strength in normal application.
3) the material of the thimble can be stainless steel or high-quality carbon steel.
4) the thimble safety load should be at least 32% of the wire rope breaking the tension.
5) the thimble should be used to meet the specifications of the wire rope, the diameter of the pin shall not be less than two times the diameter of the wire rope.
Wire rope slings adopt precast concrete construction and the main parts include wire rope, inner core, strand, center, steel wire, steel stocks and others.
Bare
With plastic thimble
2.Surface treatment
Wire rope slings adopt electro galvanizing or others.
3,Bearing point
Length of wire rope slings are from bearing point to bearing point.
4.Sizes
We can customize various kinds of rigging according to customers’ requirement. Usually, the minimum circumference S of the sling is 50 times the wire rope diameter and the bending radius must be not less than 4 times of the wire rope diameter. The zone between the clamps can’t be bent under lifting force and the length is intended to be the dimension measured between the bearing points of the slings and the measured length of a ferrule-secured sling shall not differ from the nominal length by more than two rope diameters or 1% of the nominal length.
5. Eye｜Socket
There are various sockets available such as open socket, closed socket and others. Also, the eye type include Flemish eye, pressed soft eye, spliced eye, thimble eye, standard eye, hard eye at both end.
Four types of eyes
6. Hitches
There are three basic hitches including vertical hitches, choker hitches and basket hitches.
①Vertical hitches are made directly from the crane hook to the load. Full rated capacity of the slings may be used but never exceeded. A tagline should be attached to prevent rotation which can damage the sling. A sling with a hand-tucked splice can’t lay and fail if the sling is allowed to rotate.
②Choker hitches reduce lifting capability of a sling, since this method of rigging affects the ability of the wire rope components to adjust during the lift, places angular loading on the body of the sling, and creates a small diameter bend in the body at the choke point.
③Basket hitches distribute a load equally between the two legs of a sling. Rated capacities are influenced by sling angles.
Vertical Breaking Strength
Choker Breaking Strength
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Basket Breaking Strength
7. Fixing
They are equipped to fix the slings.
Wire Rope Socket Wire Rope Socket Swaged Mechanical Splice
(Poured Spelter or Resin) (Loop or Thimble)
Splice Hand Tucked Wedge Socket Clips
(Loop or Thimble)
8. Elements
9. PVC/PE/PU coated Galvanized Pressed Steel Wire Rope Slings
Others
1. Process
①At first, the wire rods experience surface treatment
②Then, wire rope slings will experience drawing, stranding, and coating, which includes heat treatment and cooling treatment.
③At last, they will be packaged and delivered to the customers.
④They will received heat treatment, polishing short blasting, painting, electro-plating chemical plating,
2. Different socket types
Soft eye hand spliced Thimble eye hand spliced
Soft eye machine swaged Thimble eye machine swaged
Steel ferrule machine swaged closed swag socket
Opened socket Closed socket
3. Lay
There are various lays including right hand regular lay, left hand regular lay, right hand Lang lay, left hand Lang lay, right alternative regular lay and left alternative regular lay.
4. Packaging Details
Wire rope slings are always packaged in plywood reel/plastic reel/wooden reel/coil in container, and then they will be palletized or put into a crate or a box.
5. Different types of wire rope slings
There are various types of wire rope slings including slings with soft eye, hoist slings, slings with soft eye and two legs, steel ferrule secured slings, slings with Flemish eyes, ferrule secured endless slings, slings with steel-ferrule secured end stops, slings with swaged steel tie rod, slings with single hook, slings for crane, slings with sockets, slings with master link and two legs, slings with cuneiform connector, flat wire rope mesh slings, slings with master link and four legs, endless wire rope slings, container lifting slings for sea oil platform, large diameter cable laid slings, slings for lifting reinforcing steel bars, cable laid grommet slings, cable stocking, slings with spliced eye termination and others, and the main products are as following.
A. Single leg wire rope slings
B. 2/Double leg bridle wire rope slings
2-Leg bridle slings constructed of two wire rope assemblies that are attached to an oblong ring are designed for general lifting when the attachment can be made directly to the load. The lifting ends of the wire rope legs can be fitted with a variety of hooks, eyes, or rings to allow attachment to nearly any object. The advantage of wire rope slings is that they are resistant to corrosion, heat, sunlight and most chemicals and they are custom built to meet your specific needs for any application.
C. 3 leg bridle wire rope slings
3-Leg bridle wire rope slings constructed of three wire rope assemblies that are attached to an oblong ring are designed to handle unbalanced loads. The lifting ends of the wire rope legs can be fitted with a variety of hooks, eyes, or rings to allow attachment to nearly any object. We carry a range of wire rope slings in our hire fleet with soft eye configurations at each end, available in various capacities and effective working lengths.
D. 4 leg bridle wire rope slings
4-Leg bridle wire rope lifting slings constructed of four wire rope assemblies that are attached to an oblong ring are designed for balanced or unbalanced loads and for heavy lifts when the weight can easily be distributed over four points. The lifting ends of the wire rope legs can be fitted with a variety of hooks, eyes, or rings to allow attachment to nearly any object.
E．Endless wire rope slings | Steel wire rope endless slings
The endless wire rope slings are orbicular, economical and adaptable slings with no fixed wear points, using special technology and the most advanced equipment and known for its softness, high tension and increased suspension points. They are suitable to lift and move tubes, pipes and long metal parts which suited in small and limited spaces and for high/large lifting loads, they are also adaptable for special bulk hoisting requirements of different conditions, such as transformers, shipbuilding and special machinery (where the warning mark locates cannot be used as lifting point)
Slings can be realized with galvanized or ungalvanized wire rope, special rope protected by strong PVC sleeve to resist against sharp edges without damaging the goods surface is also available as per your request.
F. More wire rope slings
With round solid thimble
With swaging sockets (jaw-jaw)
With swaging sockets (jaw-eye)
With swaging sockets (eye-eye)
With swaging sockets (flt-flt stud-stud)
Spelter sockets (open-open)
Spelter sockets (open-closed)
Spelter sockets (closed-closed)
Pear type
6. Angle type
7. According to the strength, wire rope slings can be divided into vertical breaking strength, chocker breaking strength, basket breaking strength, and except for standard eye size, thimble eye size, there are others of different eye hook capacity.
8. Cautions
If you come into the following conditions, you have to take the sling replacement for consideration
①For strand laid and single part slings, ten randomly distributed broken wires in one rope lay, or five broken wires in one strand in one rope lay.
②For cable laid and braided slings of less than 8 parts, twenty randomly distributed broken wires in one lay or braid, or on broken strand per sling.
③Severe localized abrasion or scraping, kinking, crushing, bird caging or any other damage resulting in distortion of the wire rope structure.
④Evidence of heat damage or if a wire rope sling having a fiber core is exposed to temperatures in excess of 200° F or if a wire rope sling having a steel core is used at temperatures above 400° F or below minus 60° F.
⑤Corrosion of the rope or end attachments or not laying and opening up of a tucked splice. Also, when end attachments that are cracked, deformed, or worn.
⑥Deformation—any visibly apparent bend or twist from the plane of the unbent hook. Throat opening—any distortion will cause an increase in throat opening of 5% not to exceed capacity.
⑦Avoid twists, kinks and knots before lifting, store wire rope slings where they will not be subjected to dirt, moisture, extreme heat, corrosion or mechanical damage.
⑧Protect the sling body against sharp edges and corners of loads, protrusions or abrasive surfaces. Sharp bends can distort wire rope and reduce its strength.
⑨Never "shock load" wire rope slings, the actual force caused by a sudden application of load can easily exceed rated capacities and damage slings and abruptly releasing a load can also damage the slings.
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