1 Tonne Round Webbing Sling, 1000 kg Lifting Sling — the Sling You Buy by the Dozen, and How to Manage the Dozen

1. Why the smallest class is the one bought in quantity

A one tonne sling is a light lift. Most light lifts are made often, by more than one person, at more than one place in a works: a pump set, a jig, a bundle of tube, a pallet of finished parts. So the order for this capacity is rarely for one. It is for five, for twenty, for a hundred, with spares, because the alternative — going to find the one sling that exists — costs more time than the sling costs money.

Two facts follow from that, and both of them are about quantity rather than about capacity.

The band itself, its width, its colour, the hitches it may be used in and how it fits a small hook are the subject of the 1 ton endless webbing sling page, and this page does not repeat them. What follows is what changes when there are twenty of them.

2. The set, not the article, is what has to be managed

A single sling is managed by looking at it before you use it. A set is managed by three things that have nothing to do with the band: it has to be identified so that a worn one can be named rather than described, it has to have a place so that the worn one is not the one that happens to be on top, and it has to have a route out so that a rejected article leaves the set instead of going back in the bucket.

3. Where a small sling dies: the four mechanical deaths

Small slings rarely fail from overload. They die mechanically, and the four ways are recognisable at a glance. Knowing which death each mark belongs to is what makes the pre-use check fast enough to actually happen on a one tonne article.

The photograph is the configuration that produces two of those deaths and prevents a third. The band is wrapped round a bundle of tube and taken up to a hook, which is a normal and correct use of a small sling; what matters is that the bundle's cut ends are protected where the band crosses them, that the band is not left on the bundle after the lift, and that the wrap itself is read as what it is — a choked configuration with a different rated capacity from a straight vertical lift. The edge question, and what protection actually changes, is set out on the circular lifting straps page.

4. The tie-down temptation

A one tonne band is the right width, the right length and the right strength to hold a bundle together on a truck, to keep a gate closed, to pull a machine into position. It is also the article that is nearest to hand when somebody needs a tie, because there are twenty of them hanging on a hook. No rule survives that combination on its own; what survives it is having an alternative within arm's reach.

The distinction worth putting in front of the person who is about to do it is not that one use is safe and the other is not. It is that a lifting sling and a lashing are rated and marked for different things, and the moment a sling is used for lashing it stops being a lifting accessory in practice while still looking like one in every respect that matters.

The practical answer is therefore a physical one: keep a few lashing belts of the same width where the slings are kept, and make the rule "the sling is for lifting, and here is the thing that is for tying" rather than "do not use the sling". The economics of a consumable one tonne article are covered on the disposable sling page, and they explain why a site may deliberately buy cheap ones for the rough jobs — but a sling that has been used as a lashing belongs in the set's reject bin afterwards, not back on the hook.

5. What to specify so that a set works

The specification for a set is slightly different from the specification for one sling, because four of the decisions are made once for the whole set rather than per article. They are listed here in the order in which getting them wrong costs the most time.

6. Issuing and returning: the thirty-second check

The pre-use check has to be short enough that a person doing it at the end of a shift does not skip it. On a one tonne band it can be, because the band is small enough to look at in one movement and the four deaths in section 3 are all things the hand finds as quickly as the eye.

• Run the band through the hand, both faces. Abrasion, glazing and stiffness all read through a gloved hand faster than through the eye, and the hand finds the place where a band has been dragged without looking for it.

• Look at the two eyes and the stitching. A cut eye, a pulled stitch or a distorted eye is the end of the article, and on a small sling the eye is the part that has been over the smallest hook.

• Read the marking. A marking that has become unreadable takes the article out of service by itself, whatever the band looks like.

• Feel for contamination and damp. Oil, grit and a wet band are how a textile article is stored badly, and a contaminated band hides the damage it is carrying.

• Return it to the hook, not to the floor. The check is only half of the routine; the other half is putting the article where the next person will find it sound.

If any of those five finds something, the article goes in the bin in section 2 and does not go back on the hook. Where the article is repairable, the repair belongs to a sling manufacturer or an equivalent entity and is followed by a proof test to twice the rated capacity, with the certificate kept; temporary repairs are prohibited, and a sling must not be used without affixed and legible identification markings. Those duties, and the wider regime of examination intervals and records that a site runs around them, are set out on the steel plant lifting sling page rather than repeated here.

7. Two units in one name: 1 tonne and 1000 kg

The name of this listing states the same capacity twice, once in tonnes and once in kilograms, and that is useful rather than redundant: it is the pair that tells a buyer the two notations are the same article. What the name still does not state is everything else the order needs.

One clarification that belongs on this page because the two notations invite it: the kilogram figure on a label is a mass, and the article resists a force. The convention of publishing a limit in kilograms is what lets a sling be compared directly with a weighed load, and it works because the lift is static and the geometry is accounted for separately. Where the angle between legs or a choked configuration is involved, the figure being compared is no longer simply the mass. That subject is treated on the flat webbing sling page. What the order settles once for a whole set instead — the length and how it is measured, the marking, the identity treatment, the eye against the smallest hook, and the spare — is the list in section 5.

8. What a set costs over its life

The honest arithmetic for a small sling is that the article is the cheapest part of owning it. A set of twenty one tonne bands costs less than the time somebody spends over a year looking for them, losing them, inspecting and replacing them. That is worth stating plainly, because it is the argument that funds the three cheap things in section 2.

• The article. Bought in quantity, it is a consumable, and the price reflects it.

• The time. Looking for a sling that is not where it should be; checking a doubtful one twice; stopping a lift because the right capacity is not on the hook. This is the dominant cost, and it is the one the hook and the count in section 2 remove.

• The replacement rate. A set whose members die from dragging, tying and being left on loads has a visible replacement rate. If a site knows that rate, a change in it is information: a rate that doubles after a new process starts is telling you something about the process.

• The inspection. The same examination takes the same time whatever the capacity, so on a small article it is a large share of the value. That is an argument for examining in batches at a set level rather than arguing that a cheap sling does not need examining.

9. Frequently asked questions

Contact

Tell us how many you need, the length and how you measure it, the width and ply you want kept consistent across the set, and the smallest hook or shackle the eyes have to sit on. We will supply the marking per hitch, the certificates that identify each article, and the same specification repeated across the set so that a replacement is the same article as the one it replaces.

• Telephone and WeChat — 18066002268

• E-mail — 702461526@qq.com

• Address — Lifute Industrial Park, Taizhou City, Jiangsu Province, China

• HS code — 630790