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Knuckle Boom Marine Cranes

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Knuckle Boom Marine Cranes

Knuckle Boom Marine Cranes from the BOB-LIFT product catalog.

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About our knuckle boom marine cranes

A knuckle boom marine crane has a folding boom that tucks into a compact position on deck when it is not in use. It suits vessels with little free deck space and is used to move cargo, stores and equipment between ship and shore.

BOB-LIFT offers knuckle boom marine cranes in 14 capacity classes from 0.8 t to 25 t: 0.8, 1.6, 2, 3.2, 4, 4.6, 5, 6.3, 8, 10, 12, 16, 20 and 25 t. Many classes have more than one model, such as the SQ8ZA4T, SQ8ZA4TJ and SQ8ZA5TJ at 8 t, or the SQ12ZA4T and SQ12ZA5T at 12 t. Before release, each crane runs every boom and slewing motion on a deck-style test stand in Xuzhou.

When you compare models, start with the load and the outreach you need over the ship's side, and read the load chart at that radius. Then check that the deck can carry the crane and that your vessel can supply the hydraulic power it needs. Where several models share a capacity, ask us which one fits your deck. For a straight boom, compare our telescopic boom marine cranes.

Marine Cranes BrochurePDF · EN · 12 pages · 8.3 MB

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Published figures · Knuckle Boom Marine Cranes

Compare the series

Figures from the BOB-LIFT technical drawings. Confirm the final specification with our team before ordering.

Model 0.8 Ton Knuckle Boom Marine Crane 0.8 Ton Knuckle Boom SQ08Z-T Series·2 configurations 1.6 Ton Knuckle Boom Marine Crane 1.6 Ton Knuckle Boom SQ1Z-T Series·2 configurations 2 Ton Knuckle Boom Marine Crane 2 Ton Knuckle Boom SQ2Z-T Series·2 configurations 3.2 Ton Knuckle Boom Marine Crane 3.2 Ton Knuckle Boom SQ3.2Z-T Series·2 configurations 4 Ton Knuckle Boom Marine Crane 4 Ton Knuckle Boom SQ4Z-T Series·3 configurations 4.6 Ton Knuckle Boom Marine Crane 4.6 Ton Knuckle Boom BLZ90-T Series·2 configurations 5 Ton Knuckle Boom Marine Crane 5 Ton Knuckle Boom SQ5Z-T Series·3 configurations 6.3 Ton Knuckle Boom Marine Crane 6.3 Ton Knuckle Boom SQ6.3Z-T Series·3 configurations 8 Ton Knuckle Boom Marine Crane 8 Ton Knuckle Boom SQ8Z-T Series·4 configurations 10 Ton Knuckle Boom Marine Crane 10 Ton Knuckle Boom SQ10Z-T Series·3 configurations 12 Ton Knuckle Boom Marine Crane 12 Ton Knuckle Boom SQ12Z-T Series·5 configurations 16 Ton Knuckle Boom Marine Crane 16 Ton Knuckle Boom SQZ330T 20 Ton Knuckle Boom Marine Crane 20 Ton Knuckle Boom SQZ430T 25 Ton Knuckle Boom Marine Crane 25 Ton Knuckle Boom SQZ500T
Capacity 0.8 t 1.6 t 2 t 3.2 t 4 t 4.6 t 5 t 6.3 t 8 t 10 t 12 t 16 t 20 t 25 t
Max lifting moment 1.3 t·m 2.2 t·m 4.2 t·m 6.8 t·m 8.4 t·m 9.2 t·m 10.5 t·m 13.2 t·m 16.7 t·m 21 t·m 27 t·m 33 t·m 42.3 t·m 53.9 t·m
Max working radius 4.15 m 4.23 m 5.1–7.54 m 7.7 m 7.7–9.4 m 9.75–11.7 m 8.05–9.9 m 10.2–12.2 m 10.52–14.68 m 12.63–14.68 m 10.15–14.5 m 15.9 m 16.6 m 18 m
Max lifting height ≈ 5.5–5.7 m ≈ 5.5–5.7 m ≈ 6.5–9 m ≈ 9.5 m ≈ 9.5–11.5 m ≈ 12–14 m ≈ 10–12 m ≈ 12.5–14.5 m ≈ 13–17 m ≈ 15–17 m ≈ 12.5–16.5 m ≈ 18.5 m ≈ 19 m ≈ 21 m
Boom sections 3+1 3+1 2–4 3 3–4 — 3–4 4–5 4–6 5–6 4–6 — — —
Rotation angle 330° 330° 360° 360° 360° 360° 360° 360° 360° 360° 360° 360° 360° 360°
Power 3.5 kW 7.5 kW 9 kW 15 kW 14–15 kW 15 kW 22 kW 22 kW 25 kW 30 kW 30 kW 45 kW 45 kW 55 kW
Self weight 200–220 kg 350–380 kg 590–630 kg 1,190–1,236 kg 1,210–1,260 kg 1,420–1,520 kg 2,060–2,120 kg 1,680–1,740 kg 2,470–2,730 kg 2,780–2,920 kg 3,900–4,400 kg 4,500 kg 4,900 kg 6,474 kg
Built to order View the 0.8 t series View the 1.6 t series View the 2 t series View the 3.2 t series View the 4 t series View the 4.6 t series View the 5 t series View the 6.3 t series View the 8 t series View the 10 t series View the 12 t series View SQZ330T View SQZ430T View SQZ500T

How our cranes are made

From steel
to shipment.

Photographed at our factory in Xuzhou, Jiangsu: the steps a crane goes through before it leaves.

Parts and hydraulics
01 / 10 Parts and hydraulics Boom sections, cylinders, frames and hydraulic parts are staged next to the assembly line.
Parts and welds
02 / 10 Parts and welds Boom sections, cylinders and hydraulic parts are checked in the workshop before and during assembly.
Assembly halls
03 / 10 Assembly halls Knuckle and telescopic booms are assembled in long rows under overhead cranes.
Load and function test
04 / 10 Load and function test The finished crane is mounted on the test bay and runs through lifting, slewing and outrigger functions under load.
Lift the crane onto the chassis
05 / 10 Lift the crane onto the chassis An overhead hoist holds the crane while it is placed on the truck frame in the workshop.
Fix the crane to the frame
06 / 10 Fix the crane to the frame Technicians work under the cab to secure the crane base to the chassis.
Check the finished truck
07 / 10 Check the finished truck The crane stands complete on the truck with its boom raised for inspection.
Line up the order
08 / 10 Line up the order Every crane in an order is tested, set on its base or a pallet and lined up in the hall before packing.
Wrap the crane
09 / 10 Wrap the crane Cranes are wrapped in stretch film before they leave the workshop.
Load the container
10 / 10 Load the container A hoist or a forklift moves each packed crane into the container.

Guides and news

Read before you buy

All news
BOB-LIFT SQ3.2ZA3TJ yellow folding crane on a black test frame in a bright factory hall with large windows. Marine Crane Sizes: Matching Capacity, Reach and Deck to Your Vessel Marine crane sizes from 0.8 t to 25 t in one table, with the load each model holds at full reach, how to read size at your working radius, and what your vessel must carry. Read the article BOB-LIFT SQ10ZA6TJ shows a blue boom with a winch drum and hydraulic hoses in a busy factory hall. Crane Winch Guide: When Truck and Marine Cranes Need a Winch What a winch does on knuckle boom and telescopic truck mounted and marine cranes, when a crane with a winch is worth it, what it adds in weight, how the J option works on BOB-LIFT cranes, and the daily rope checks. Read the article A row of finished green BOB-LIFT knuckle boom cranes from one order lined up in the factory hall before packing Crane Shipping from China: Container, Flat Rack or RoRo, Documents and Incoterms How a truck mounted, knuckle boom or marine crane gets from a Chinese factory to your port. Container, flat rack or RoRo, packing and lashing, documents, FOB vs CIF and the arrival check. Read the article

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