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WLL 60 Ton Polyester Webbing Slings.

ஏ 60 tonne webbing sling is not a bigger version of a 3 tonne band. It is a different article: the plies are counted, the eye is built to clear a 60 tonne shackle, the stitching has to be inspected row by row, and the band arrives as a two-person lift with a drawing attached. Everything below is what that involves.

What changes when the figure is 60 டன்கள்

Four things, and each one is a specification decision rather than a sales detail.

Bearing pressure. 60,000 kg spread across a 300 mm band is 200 kg for every millimetre of width. On a painted steel fabrication that figure decides whether the coating survives the lift; on a machined shaft it decides whether the band crushes the surface it is holding. It is also the reason a 60 t sling is wide rather than merely thick — width is the only part of the geometry that lowers pressure without adding height.

Eye clearance. The eye has to seat on the bow of the shackle or the throat of the hook, not on its pin, and not bent round a fitting two sizes too small. On a 60 t assembly the fittings are large enough that the eye’s internal length becomes the constraint: an eye that is short for the fitting concentrates the load on the inner face and wears out there first, long before the band itself shows anything.

Mass and handling. ஏ 60 t band is heavy enough that rigging it is a planned operation, not a one-handed one. Length matters as much as width here: the same sling at 12 m is a different handling problem from 4 மீ, and both need two people, a clean floor and somewhere to lay it out. We quote the mass against the drawing so the lift plan has the right number.

Transport. ஏ 60 t sling of any useful length is coiled, strapped and crated or palletised, and it takes volume in a container that a 5 t sling does not. It also has to arrive without a fold set pressed into the webbing, which is why it is coiled to a diameter rather than folded flat.

The figure is per hitch, மற்றும் 60 t is not the only number on the label

When a buyer asks for a 60 ton webbing sling, the first useful question back is which hitch it will be used in — because the same band gives five different answers depending on how it is hitched, and every one of them is printed on the label. The numbers below are this sling’s rating, not a generic table:

The choked line is the one that catches people out. ஏ 60 t band choked is a 48 t band, so a load that has to be choked and weighs 55 t needs the next size up — not a longer sling, and not a second wrap of the same one.

How a band that carries 60,000 kg is built

Polyester yarn is woven into a flat band, and the band is then assembled into plies. On a 60 t sling the ply count and the width are solved together: fewer plies in a wider band gives a flatter, more conformable article that spreads pressure on a delicate load; more plies in a narrower band gives a stiffer article that suits a compact hook and a hard load. Neither is better in the abstract — the load picks.

The eyes are the part that takes the work. The band is folded back on itself, the fold is stitched through six rows in a pattern sized to the eye, and the eye is then reinforced with a wear sleeve so the shackle bow bears on a sacrificial layer rather than on the load-bearing weave. That sleeve is the first thing to wear and the cheapest thing to renew; a sling whose eye is worn into the weave is a sling that is finished.

The weave itself carries a fine longitudinal rib, and that rib is not decoration: it is where the yarn runs, and it is the line an inspector follows when looking for a cut, a snag or a pulled thread after a lift.

The eye, the hook and the shackle have to agree

Most of the 60 t slings we replace were not worn out in the band. They were worn out in the eye, because the eye was made to a default length and then used on a fitting that did not match it. Three things settle it before the band is woven:

• The fitting that will hold it — a 60 t shackle and a 60 t hook do not have the same bearing surface, and the eye has to be sized to the larger of the two if both will be used.
• The load’s own geometry — a flat eye sits on a bow; a twisted eye turns the band through 90 degrees so it lies flat against the side of the load rather than edge-on.
• The direction of the last metre — if the band has to leave the hook at an angle, the eye takes that angle on its inner face and needs the clearance to do it without a hard spot.

Where the fitting is unusually large, or where the sling will be used interchangeably on hooks of two sizes, we build the heavy eye webbing sling instead: longer eye, extra reinforcement, and the same band. It costs a little more and it removes the failure mode.

One sling, or an assembly

A single 60 t sling is rarely the whole answer above about 30 டி, because at that level the load is usually a fabricated item that wants four pick points rather than one. Two routes:

• Multi-leg assemblies — two or four 60 t legs to a master link, with the assembly figure taken from the table above rather than by adding the legs together. The load does not share evenly, and a four-leg assembly is not 240 டி.
• A spreader — where the load must not be squeezed, or the pick points are wider than the included angle allows, அ தூக்கும் விரிப்பு கற்றை takes the horizontal component out of the legs and the slings work vertically again.

Below 60 t the range steps down in the same construction, so a mixed lift can be built from one family: தி 5 tonne webbing sling, தி 4 tonne and the 3 tonne bands are the same weave in fewer plies. The full range sits under flat webbing slings.

What is tested, and what is printed on the band

Every 60 t sling is proof loaded and inspected before it leaves the works, and the label is applied to that individual article rather than to the batch. The label carries the working load limit for each hitch, நீளம், the material, the standard, the manufacturer, a serial number and the date. Where the job needs it, the sling goes out with a test certificate to EN 10204 3.1 quoting that serial, so the piece on site can be traced back to the proof load record.

Handling, storage and the end of a 60 டி ஸ்லிங்

A band of this size is easy to damage and expensive to replace, and almost all of the damage is avoidable:

• Lay it out and hook it; never drag it across concrete or over a weld seam to get it into position.
• Keep it off hot work. Polyester is comfortable to 100 °C and fails by melting, not by stretching politely.
• Store coiled, clean and dry, சூரிய ஒளி வெளியே, off the floor, with its certificate and its inspection record.
• Inspect before every lift and formally at the interval your site sets — cuts, ஸ்னாக்ஸ், பஞ்சர்கள், broken stitching, a distorted or worn eye, chemical or heat damage, an unreadable label. Any one of those retires the band.

Where 60 tonnes is the normal answer

• Wind turbine components — nacelle sections, hubs, blade root fixtures
• Shipbuilding and ship repair — blocks, modules, fabricated panels
• Power transformers and heavy electrical plant, where the case must not be marked
• Precast concrete and segment moulds, where the lifting point is a cast-in loop
• Steel structures — trusses and girders with a finished coating
• Skids, modules and packaged plant for transport and installation

Sizing it in five answers

We do not quote a 60 t sling from a tonnage alone. Five things settle width, நீளம், eye and assembly, and every one of them changes the price:

1. The load and its mass, and whether the figure is per leg or total.
2. How it will be hitched — vertical, choked, basket, and the leg angle.
3. The fitting that holds it: கொக்கி, கட்டை, master link, or a cast-in loop.
4. The surface: painted, machined, abrasive, hot, or chemically exposed.
5. The length between bearing points, and how it will be stored and inspected.

Questions we are asked about the 60 டி ஸ்லிங்

Figures quoted are for the standard build to EN 1492-1 at 6:1. ASME B30.9 builds at 5:1 are available on request; the labelled WLL always governs the lift.