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Motorized Coil Lifting Tongs

An electric tong for eye-horizontal steel coils – motor-driven jaws, 90-degree upending, no manual handling and no hydraulic hose on the hook

Motorized coil lifting tongs do the one job a crane hook cannot: take a steel coil lying on its side, hold it by the outside diameter and turn it through 90 degrees so it can be set down standing, or lifted onto a mandrel. Everything that moves is driven by a geared electric motor on the tong itself – the jaws open and close under power, the body rotates under power, and the operator works from a pendant or a radio handset well clear of the load. There is no hydraulic unit to leak over a coil, no slinger on the coil face, and no manual jaw to set. We build the tong in Taizhou in capacities from 5 t uz 32 t for coils from 600 mm līdz 2200 mm outside diameter, and it sits alongside the rest of our steel-mill range: uz spoles apstrādes staru kūlis for eye-vertical coils, uz C veida āķi spolēm for single-eye lifts, un slab billet crane clamp lifting tong for plate and billet.

How a Motorized Coil Tong Works

The jaws close on the coil OD, not on the edge

Two jaws travel on a cross-beam and close until the pads meet the outside diameter of the coil. Because the coil is gripped on its curved surface, the contact is spread over a wide pad rather than concentrated on an edge – the reason a coil can be lifted by its OD at all without the wrap opening up. Pads are steel with a polyurethane facing as standard, and copper or brass facings are used where the surface must not be marked.

A geared brake motor does the clamping

The jaw drive is a helical-gear brake motor with a worm reduction: it closes the jaw, holds it with the brake, and cannot be back-driven by the load when the power is off. That is the difference between a motorized tong and a screw clamp – if the pendant is dropped or the power fails, the coil stays clamped. A torque limiter is set at the works so an operator cannot crush a light coil by holding the close button.

Rotation is a separate, slower axis

The body of the tong carries a slewing ring driven by a second geared motor. A 90-degree upend takes 45 uz 90 seconds depending on the model – slow enough that the coil does not swing, fast enough not to hold up a truck. Mechanical stops are fitted at 0 un 90 degrees, ar 180 un 270 degree stops on the 360-degree version, and a limit switch cuts the drive at each stop instead of relying on the operator’s eye.

Control from outside the hazard

Standard control is a pendant on a 3 m cable with a coiled lead, plus a radio handset as an option. Both give open/close, rotate left/right and an emergency stop. The control box is IP65 and mounted on the tong body, so the only cable crossing the hook is the festoon or the radio link – no hydraulic hose, no air line.

Struktūra un materiāli

The frame is a welded box structure in Q355B, with the jaw carriages in Q460 where the bending moment peaks. Žokļi ir kalti no 42CrMo, rūdīts un rūdīts līdz apmēram 45 HRC, and the gripping pads are replaceable without stripping the jaw. Pins are 40Cr with induction-hardened journals running in greased bushings, and every pin is shouldered and split-pinned. The slewing ring is a sealed, grease-lubricated bearing sized with a static margin well above the rated load, because a coil tong spends its life carrying its load on that one bearing. Finišs tiek nošauti uz Sa 2.5, epoxy primer and two polyurethane topcoats in RAL 1023.

Standarta izmēri un parametri

Capacity is the working load limit, and the coil figures are the range the jaws can physically take. Check the widest coil in the programme against the jaw opening, and the heaviest coil against the capacity – the two do not always peak on the same coil.

Modelis	Nominālā jauda	Coil OD	Coil width	Žokļa atvēršana
ECT-5	5 t	600 – 1400 mm	500 – 1500 mm	620 – 1460 mm
ECT-10	10 t	700 – 1600 mm	600 – 1700 mm	720 – 1660 mm
ECT-16	16 t	800 – 1800 mm	700 – 1800 mm	820 – 1860 mm
ECT-20	20 t	900 – 2000 mm	800 – 2000 mm	920 – 2060 mm
ECT-25	25 t	1000 – 2100 mm	900 – 2100 mm	1020 – 2160 mm
ECT-32	32 t	1000 – 2200 mm	900 – 2200 mm	1020 – 2260 mm

Standarta diapazons. Coil inside diameter does not limit the tong – it grips the outside diameter – but tell us the ID if the coil will be set down on a mandrel. Wider or narrower jaws and intermediate capacities are built to order.

Motorized Coil Lifting Tongs Technical Data

Jauda	Coil Parameter	Open Width A (mm)	Dimensions(mm)			Feeding Speed	Drive Mode	Limit Mode	Remark
			B	C	D
10Ton	Inner diameter: Φ500mm	250-1900	1000	2700	2900	2-3m/min	Rack and pinion drive	Limit by trip switch	Can be used for high temperature
15Ton
30Ton
10Ton	Outer diameter: Φ2200mm							Limit by photoelectric switch	Normal temperature coil
15Ton
30Ton

Specifikācijas kopsavilkums

How to Specify a Coil Tong

Five numbers from the coil programme decide the model, and one of them is usually the one that changes the answer:

• Heaviest coil – sets the capacity. Do not use the nominal capacity of the crane as the starting point.
• Widest outside diameter – sets the jaw opening. A tong that just clears the largest coil leaves no room for a wrapped or out-of-round coil, so allow 60 mm.
• Coil width against the jaw depth – a narrow coil in a wide tong will sit back in the jaws and can tip.
• Rotation needed – 90 degrees for upending, 360 degrees where the coil must be presented at any angle to a slitting or CTL line.
• Power supply at the crane – voltage, frequency and whether the site allows a trailing cable or wants radio control.
• Pienākums – a warehouse handling 40 coils a shift needs a different brake and bearing regime from a line that moves four, and a spare tong is cheaper than a stopped line.

Where Motorized Coil Tongs Are Used

• Coil warehouses and steel service centres, stacking and de-stacking eye-horizontal coils
• Slitting and cut-to-length lines, loading the mandrel and removing the remnant
• Hot-dip galvanising and coating lines, where the coil is upended before the entry looper
• Rolling mills and continuous casting, coil transfer from the coiler to the saddle
• Ostas un dzelzceļa pārsēšanās punkti, where the tong travels with the crane rather than the cargo
• Press shops feeding a blanking line from horizontal coil

Operation, Apskate un apkope

The tong is a power tool, so the checks are split between the electrical side and the mechanical side:

• Katra maiņa – pads for scoring and wear, jaw travel for obstruction, brake holding with a test lift, pendant cable and plug, emergency stop function.
• Weekly – slewing ring grease, limit switch operation at both stops, torque limiter setting, control box seals.
• Ik gadu – strip and inspect the jaw pins and bushings, NDT the main welds, pierādījums slodze, atkārtoti sertificēt un atkārtoti atzīmēt.
• Pads and jaw facings are wear parts and are replaced as a set; a jaw with one new pad will grip unevenly and mark the coil.

Kas tiek piegādāts ar katru knaibles

• Pierādījums kravas sertifikātam plkst 1.25 x nominālā jauda
• Material certificates for the frame, jaws and slewing ring
• General arrangement drawing with the centre of gravity and hook clearance
• Wiring diagram, control description and operation and maintenance manual
• Spare pad set and spare pin set
• Nerūsējošā plāksnīte ar ietilpību, sērijas numurs un pārbaudes datums

Bieži uzdotie jautājumi

What happens to the grip if the power fails mid-lift?

Nothing. The jaw drive is a brake motor with a worm reduction, so it holds position when the supply is cut – the coil stays clamped until power returns. Rotation also stops and holds under the brake. The emergency stop drops both drives without releasing the jaws.

Can one tong handle both eye-horizontal and eye-vertical coils?

The 360-degree version can present a coil at any angle, so it can pick from a horizontal stack and set down on a mandrel, or turn a coil upright for storage. If the site only ever moves horizontal coils onto a saddle, the 90-degree version is cheaper, lighter and has fewer switches to maintain.

How long does a 90-degree upend take?

Between 45 un 90 seconds depending on capacity and coil weight, plus the time to close the jaws. The slewing drive is geared for control rather than speed: a fast upend swings the coil on the pads and is the usual cause of a marked or slipping coil.

Does the tong damage the coil surface?

The standard pads are steel with a polyurethane facing, which grips without marking on clean, dry coil. For galvanised, coated or polished coil we fit copper or brass facings so no steel touches the surface. Tell us the surface finish and we will match the pad.

What coil sizes can be handled without a special build?

The standard range covers coils from 600 mm līdz 2200 mm outside diameter and 500 mm līdz 2200 mm plats. Coils outside that envelope – narrow slit strip, very large OD, or coils with damaged edges – are quoted against the coil drawing rather than stretched from the standard model.

How is capacity verified?

Katra vienība ir pārbaudīta 1.25 reizināta tā nominālā jauda pirms nosūtīšanas un izsniegta ar sertifikātu, kurā norādīts sērijas numurs uz datu plāksnītes. The structure is designed on a 4:1 faktors, un žokļi, pins, stops and slewing bearing are checked dimensionally after the test.

Request a Quote for Motorized Coil Lifting Tongs

Send the coil programme (outside diameter, inside diameter, width and weight), the rotation you need, celtņa āķa izmērs, the site voltage and how many coils a shift you handle. Mēs atgriezīsimies ar modeli, a GA drawing for approval and a delivered price. Lift Sling Rigging Co., SIA – tālrunis un WeChat +86 180 6600 2268, e-pasts 702461526@qq.com, Lifūtes industriālais parks, Taidžou pilsēta, Dzjansu province, Ķīna.

Pārējais dzirnavu apstrādes diapazons – ruļļu pacelšanas sijas, spoles sijas un C veida āķi – sēž zem pacelšanas ierīces.

Saistītie produkti

• Visas pacelšanas ierīces
• Spoles apstrādes sija
• C veida āķi celtņiem un celšanas spolēm
• Plātņu sagatavju celtņa skavas pacelšanas knaibles
• Roll pacelšanas sijas
• Izkliedētāja sija
• Četru punktu pacelšanas sija
• Regulējama pacelšanas sija
• Dubultā celtņa pacelšanas sija
• Kravas auto dubultsiju pacelšanas mehānisms