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BOB-LIFT

Knuckle Boom Marine Cranes

SQ6.3ZA4TJ6.3 Ton Knuckle Boom Marine Crane

SQ
Truck mounted crane
6.3
6.3 t capacity class
Z
Knuckle boom
A4
1 main boom + 3 hydraulic booms
T
Marine version
J
With winch
Max Lifting Capacity
6300kg
Max Lifting Moment
13.2t·m
Recommended Power
22kW
Hydraulic System Flow
40L/min
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Or message us +86 158 5249 9415 info@boblift.com

Confirm your configuration and current availability with our team.

6.3 Ton Knuckle Boom Marine Crane

Engineering data

SQ6.3ZA4TJ Specifications

Lifting

Max Lifting Capacity
6300kg
Max Lifting Moment
13.2t·m
Rotation Angle
360° continuous
Winch
Included

Hydraulics and power

Recommended Power
22kW
Hydraulic System Flow
40L/min
Hydraulic System Pressure
28MPa
Oil Tank Capacity
100 L

Machine

Self Weight
1740kg

Reach and outriggers

Max. radius
10.2m
Max. height
≈ 12.5 m
Max. boom angle
75°

Figures from the BOB-LIFT brochure for this range. Confirm the final specification with our team before ordering.

Compare all Knuckle Boom Marine Cranes

Dimensions and load chart

SQ6.3ZA4TJ dimension drawing and load chart

Select the drawing to view it full size.

How much it lifts at each reach The further the hook is from the crane, the less it can lift: 6,300 kg at 2.1 m, 1,190 kg at 10.2 m.
Lifts (kg) 6,300 3,010 2,020 1,500 1,190
Reach (m) 2.1 4.4 6.3 8.3 10.2

Reach is measured from the slewing centre to the hook. Figures from the drawing above.

Product details · SQ6.3ZA4TJ

6.3 Ton Knuckle Boom Marine Crane

The SQ6.3ZA4TJ is one of 17 models in our Knuckle Boom Marine Cranes range, which runs from 0.8 t to 25 t.

The SQ6.3ZA4TJ is a 6.3 t knuckle boom marine crane with a maximum lifting moment of 13.2 t·m. It runs on a recommended 22 kW power supply with 40 L/min of hydraulic flow at 28 MPa, weighs 1740 kg and offers continuous 360° slewing.

Why Purchase the 6.3 Ton Knuckle Boom Marine Crane?

The 6.3 Ton Knuckle Boom Marine Crane is an advanced machine designed to improve performance, reliability, and efficiency. The crane is compact, has a good weight-to-load ratio, and is more compact.

The 6.3 Ton Knuckle Boom Marine Crane is a good purchase because of its rack cylinder design. The cylinder inclines to create a compact structure, makes use of more space, and reduces the center of gravity to make the vehicle more stable. Additionally, the crane has several adjustable parameters designed to make it more efficient and adaptable.

The 6.3 Ton Knuckle Boom Marine Crane’s design also allows for addition of extra attachments to improve its use when operators encounter new challenges. You also get great after sales service, quick answers to pressing questions, and swift delivery of accessories.

  • Capacity class

    6.3 t

    Max lifting moment 13.2 t·m

  • Knuckle boom sections

    4

    1 main boom + 3 hydraulic booms

  • Hydraulic flow

    40 L/min

    28 MPa · 22 kW recommended

Choosing the right model

Need more than 6.3 t? The next class up is the SQ8ZA6TJ at 8 t. For lighter loads, the SQ5ZA3TJ at 5 t is the class below.

Before ordering, check that the vessel's hydraulic supply can deliver 40 L/min at 28 MPa. We recommend 22 kW of hydraulic power.

Knuckle Boom Marine Crane

Product technical advantages

  • High-strength steel structure

    High-strength steel structure

    Compact, light and strong steel structure.

  • Custom installation

    Custom installation

    Pedestal mounting tailored to your deck.

  • Optional attachments

    Optional attachments

    Winch, drill pipe, basket or grapple.

  • Operation modes

    Operation modes

    Manual levers, overhead seat or wireless remote.

  • Dual four-bar linkage

    Dual four-bar linkage

    Reverse-angle reach for flexible work.

  • Dedicated torque limiter Load moment limiter, safety certified.
  • Marine anti-rust treatment Multi-layer anti-rust process for sea duty.

Manufacturing & delivery

From our workshop to your port

  1. Assembly 01

    Assembly

    Slewing base, column and booms are assembled by hand in our Xuzhou workshop.

  2. 02

    Marine test stand

    Mounted on a deck-style stand, the crane runs every boom and slewing motion before release.

  3. Final check 03

    Final check

    Finished cranes are inspected and lined up for dispatch.

  4. Packing 04

    Packing

    Wrapped in film and strapped to protect paint and hydraulics in transit.

  5. Container loading 05

    Container loading

    Loaded into containers at the factory and shipped to your port.

Shipping & warranty

Shipping, warranty and documents

Shipping

Lead time and container loading are confirmed with your quotation.

Warranty and parts

12 months

Send the model, serial number and a photo or video of the issue; our team guides the repair and ships the parts.

Order from 1 unit

Documents

FAQ

Questions about the SQ6.3ZA4TJ

About the SQ6.3ZA4TJ

What hydraulic supply does the SQ6.3ZA4TJ need?

40 L/min at 28 MPa. We recommend 22 kW of hydraulic power. Send us the vessel's hydraulic data and we confirm the match when we quote.

What warranty and minimum order apply to the SQ6.3ZA4TJ?

The SQ6.3ZA4TJ carries a 12-month warranty, and you can order from 1 unit.

Not answered here?

Send us your question and our team replies with answers for your site.

+86 158 5249 9415

Ordering and service

Which configuration should we choose for this model?

Send the working conditions, destination and site access details to BOB-LIFT. The engineering team will confirm a practical configuration before quotation.

Can the crane be customized for our working conditions?

BOB-LIFT can adjust configuration around lifting radius, site access, operation scenario and destination requirements.

What is the typical delivery time?

Send the working conditions, destination and site access details to BOB-LIFT. The engineering team will confirm a practical configuration before quotation.

What export documents are provided?

Send the working conditions, destination and site access details to BOB-LIFT. The engineering team will confirm a practical configuration before quotation.

Do you provide installation and operation training?

Send the working conditions, destination and site access details to BOB-LIFT. The engineering team will confirm a practical configuration before quotation.

What after-sales support is available?

Send the working conditions, destination and site access details to BOB-LIFT. The engineering team will confirm a practical configuration before quotation.

Model history

Earlier configurations

Previous models are configurations we no longer build as standard. They can still be built to order.

  • Current model

    SQ6.3ZA4TJThis model

    6.3 Ton Knuckle Boom Marine Crane

    Capacity
    6.3 t
    Max lifting moment
    13.2 t·m
    Self weight
    1740 kg
    Boom sections
    4
    Recommended Power
    22 kW
    Hydraulic System Flow
    40 L/min
    Hydraulic System Pressure
    28 MPa
    Oil Tank Capacity
    100 L
    Rotation Angle
    360° continuous
    Winch
    Included
    Max. radius
    10.2 m
    Max. height
    ≈ 12.5 m
    Max. boom angle
    75°
  • Current model SQ6.3ZA5T

    6.3 Ton Knuckle Boom Marine Crane SQ6.3ZA5T

    Capacity
    6.3 t
    Max lifting moment
    13.2 t·m
    Self weight
    1730 kg
    Boom sections
    5
    Recommended Power
    22 kW
    Hydraulic System Flow
    40 L/min
    Hydraulic System Pressure
    28 MPa
    Oil Tank Capacity
    100 L
    Rotation Angle
    360°
    Winch
    –
    Max. radius
    12.2 m
    Max. height
    ≈ 14.5 m
    Max. boom angle
    75°
    View SQ6.3ZA5T
  • Previous model SQ6.3ZA4T

    6.3 Ton Knuckle Boom Marine Crane SQ6.3ZA4T

    Capacity
    6.3 t
    Max lifting moment
    13.2 t·m
    Self weight
    1680 kg
    Boom sections
    4
    Recommended Power
    22 kW
    Hydraulic System Flow
    40 L/min
    Hydraulic System Pressure
    28 MPa
    Oil Tank Capacity
    100 L
    Rotation Angle
    360°
    Winch
    –
    Max. radius
    –
    Max. height
    –
    Max. boom angle
    –

Guides and news

Read before you buy

All news

Need a crane matched to your site and lifting task?

Send your working radius, load requirement, site access, destination country, and delivery schedule. BOB-LIFT will help match a practical configuration.

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