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Knuckle Boom Marine Cranes

BOB-LIFT Product Range

Knuckle Boom Marine Cranes

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

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Previous models

Configurations we no longer build as standard. Each can still be built to order on request.

Knuckle Boom Truck Mounted Cranes

Model Capacity Max lifting moment Self weight Current equivalent Built to order
SQ1ZA4 1.6 t 2.2 t·m 490 kg SQ1ZA3+1
SQ2ZA2 2 t 4.2 t·m 650 kg SQ2ZA4
SQ2ZA3 2 t 4.2 t·m 710 kg SQ2ZA4
BLZ90K4 4.6 t 9 t·m 1600 kg BLZ90K5
SQ6.3ZA3 6.3 t 13.2 t·m 2050 kg BLZ129K4, SQ6.3ZA5
SQ6.3ZA4 6.3 t 13.2 t·m 2180 kg BLZ129K4, SQ6.3ZA5
SQ8ZA4 8 t 16.7 t·m 3050 kg SQ8ZA6
SQ8ZA5 8 t 16.7 t·m 3250 kg SQ8ZA6
SQ10ZA4 10 t 21 t·m 3350 kg SQ10ZA6
SQ10ZA5 10 t 21 t·m 3550 kg SQ10ZA6
SQ12ZA4 12 t 27 t·m 4480 kg SQ12ZA6
SQ12ZA5 12 t 27 t·m 4600 kg SQ12ZA6
SQZ350 16 t 34.8 t·m 4900 kg SQZ330
SQZ1000 50 t 90 t·m 10000 kg SQZ800

Telescopic Boom Truck Mounted Cranes

Model Capacity Max lifting moment Self weight Current equivalent Built to order
SQ3.2SA3 3.2 t 7 t·m 1280 kg SQ3.2SA4
SQ6.3SA3 6.3 t 15.75 t·m 2280 kg SQ6.3SA4
SQ8SA4 8 t 20 t·m 3600 kg SQ8SA5
SQ10SA5 10 t 25 t·m 3950 kg SQ10SA4
SQ12SA5 12 t 30 t·m 4550 kg SQ12SA4
SQ14SA4 14 t 35 t·m 4800 kg SQ14SA5

Knuckle Boom Marine Cranes

Model Capacity Max lifting moment Self weight Current equivalent Built to order
SQ08ZA3T+1 0.8 t 1.3 t·m 200 kg SQ08ZA3TJ+1
SQ1ZA3T+1 1.6 t 2.2 t·m 350 kg SQ1ZA3TJ+1
SQ2ZA4T 2 t 4.2 t·m 630 kg SQ2ZA2TJ
SQ3.2ZA3T 3.2 t 6.8 t·m 1190 kg SQ3.2ZA3TJ
SQ4ZA4T 4 t 8.4 t·m 1260 kg SQ4ZA3T, SQ4ZA3TJ
SQ5ZA3T 5 t 10.5 t·m 2060 kg SQ5ZA3TJ
SQ5ZA4T 5 t 10.5 t·m 2120 kg SQ5ZA3TJ
SQ6.3ZA4T 6.3 t 13.2 t·m 1680 kg SQ6.3ZA4TJ, SQ6.3ZA5T
SQ8ZA4T 8 t 16.7 t·m 2470 kg SQ8ZA6TJ
SQ8ZA4TJ 8 t 16.7 t·m 2550 kg SQ8ZA6TJ
SQ8ZA5TJ 8 t 16.7 t·m 2650 kg SQ8ZA6TJ
SQ10ZA5T 10 t 21 t·m 2780 kg SQ10ZA6TJ
SQ10ZA5TJ 10 t 21 t·m 2852 kg SQ10ZA6TJ
SQ12ZA4T 12 t 27 t·m 3900 kg SQ12ZA6T
SQ12ZA4TJ 12 t 27 t·m 3950 kg SQ12ZA6T
SQ12ZA5T 12 t 27 t·m 4200 kg SQ12ZA6T
SQ12ZA5TJ 12 t 27 t·m 4400 kg SQ12ZA6T
SQZ350T 16 t 34.8 t·m 4200 kg SQZ330T

Telescopic Boom Marine Cranes

Model Capacity Max lifting moment Self weight Current equivalent Built to order
SQ3.2SA3T 3.2 t 6.8 t·m 1050 kg SQ3.2SA4T
SQ5SA3T 5 t 12.5 t·m 1850 kg SQ5SA4T
SQ6.3SA3T 6.3 t 15.75 t·m 1940 kg SQ6.3SA4T
SQ8SA4T 8 t 20 t·m 3100 kg SQ8SA5T
SQ10SA5T 10 t 25 t·m 3950 kg SQ10SA4T
SQ12SA5T 12 t 30 t·m 4000 kg SQ12SA4T

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.

Download the BOB-LIFT brochures

Load charts, dimension drawings and specification tables for each crane family, as a PDF you can save, print or forward.

  • PDF
  • EN
  • 12 pages
  • 8.3 MB

Marine Cranes Brochure

Knuckle boom and telescopic marine cranes with load charts, dimension drawings, power systems and project cases.

Download PDF

Compare the range

Figures from the BOB-LIFT technical sheets. Confirm the configuration for your truck or vessel with our team.

Model SQ08ZA3TJ+1 0.8 Ton Knuckle Boom Marine Crane SQ1ZA3TJ+1 1.6 Ton Knuckle Boom Marine Crane SQ2ZA2TJ 2 Ton Knuckle Boom Marine Crane SQ3.2ZA3TJ 3.2 Ton Knuckle Boom Marine Crane SQ4ZA3T 4 Ton Knuckle Boom Marine Crane SQ4ZA3T SQ4ZA3TJ 4 Ton Knuckle Boom Marine Crane BLZ90K4TJ 4.6 Ton Knuckle Boom Marine Crane BLZ90K4TJ BLZ90K5TJ 4.6 Ton Knuckle Boom Marine Crane SQ5ZA3TJ 5 Ton Knuckle Boom Marine Crane SQ6.3ZA4TJ 6.3 Ton Knuckle Boom Marine Crane SQ6.3ZA5T 6.3 Ton Knuckle Boom Marine Crane SQ6.3ZA5T SQ8ZA6TJ 8 Ton Knuckle Boom Marine Crane SQ10ZA6TJ 10 Ton Knuckle Boom Marine Crane SQ12ZA6T 12 Ton Knuckle Boom Marine Crane SQZ330T 16 Ton Knuckle Boom Marine Crane SQZ430T 20 Ton Knuckle Boom Marine Crane SQZ500T 25 Ton Knuckle Boom Marine Crane
Capacity 0.8 t 1.6 t 2 t 3.2 t 4 t 4 t 4.6 t 4.6 t 5 t 6.3 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 8.4 t·m 9 t·m 9 t·m 10.5 t·m 13.2 t·m 13.2 t·m 16.7 t·m 21 t·m 27 t·m 34.8 t·m 42.3 t·m 53 t·m
Self weight 220 kg 380 kg 590 kg 1236 kg 1210 kg 1256 kg 1420 kg 1520 kg 2120 kg 1740 kg 1730 kg 2730 kg 2920 kg 4350 kg 4500 kg 4900 kg 6474 kg
Boom sections 3+1 3+1 2 3 3 3 – – 3 4 5 6 6 6 – – –
Recommended Power 3.5 kW 7.5 kW 9 kW 15 kW 15 kW 15 kW 15 kW 15 kW 22 kW 22 kW 22 kW 25 kW 30 kW 30 kW 45 kW 45 kW 55 kW
Hydraulic System Flow 8 L/min 15 L/min 20 L/min 25 L/min 25 L/min 25 L/min 25 L/min 25 L/min 35 L/min 40 L/min 40 L/min 40 L/min 40 L/min 55 L/min 63 L/min 63 L/min 80 L/min
Hydraulic System Pressure 18 MPa 18 MPa 20 MPa 25 MPa 26 MPa 26 MPa 28 MPa 28 MPa 28 MPa 28 MPa 28 MPa 28 MPa 30 MPa 28 MPa 33 MPa 33 MPa 35 MPa
Oil Tank Capacity 20 L 25 L 25 L 60 L 60 L 60 L 57 L – 100 L 100 L 100 L 160 L 160 L 160 L 200 L 240 L 260 L
Rotation Angle 330° 330° 360° continuous 360° continuous 360° 360° continuous 360° 360° continuous 360° continuous 360° continuous 360° 360° continuous 360° continuous 360° continuous 360° continuous 360° continuous 360° continuous
Winch Included Included Included Included – Included Included Included Included Included – Included Included – – – –
Max. radius 4.15 m 4.23 m 5.1 m 7.7 m 7.7 m 7.7 m 9.75 m 11.7 m 8.05 m 10.2 m 12.2 m 14.68 m 14.68 m 14.5 m 15.9 m 16.6 m 18 m
Max. height ≈ 5.5 m ≈ 5.5 m ≈ 6.5 m ≈ 9.5 m ≈ 9.5 m ≈ 9.5 m ≈ 12 m ≈ 14 m ≈ 10 m ≈ 12.5 m ≈ 14.5 m ≈ 17 m ≈ 17 m ≈ 16.5 m ≈ 18.5 m ≈ 19 m ≈ 21 m
Max. boom angle 75° 75° 75° 75° 75° 75° 84° 75° 75° 75° 75° 84° 84° 75° 80° – 80°

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 that ship without a chassis 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.

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