Knuckle Boom Marine Cranes

BLZ90K4TJ4.6 Ton Knuckle Boom Marine Crane BLZ90K4TJ

Max Lifting Capacity: 4600kg
Max Lifting Moment: 9t·m
Recommended Power: 15kW
Hydraulic System Flow: 25L/min

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12-month warranty
Order from 1 unit
Shipping & warranty

Confirm your configuration and current availability with our team.

4.6 Ton Knuckle Boom Marine Crane BLZ90K4TJ

Engineering data

BLZ90K4TJ Specifications

Lifting

Max Lifting Capacity: 4600kg
Max Lifting Moment: 9t·m
Rotation Angle: 360°
Winch: Included

Hydraulics and power

Recommended Power: 15kW
Hydraulic System Flow: 25L/min
Hydraulic System Pressure: 28MPa
Oil Tank Capacity: 57 L

Machine

Self Weight: 1420kg

Reach and outriggers

Max. radius: 9.75m
Max. height: ≈ 12 m
Max. boom angle: 84°

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

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Dimensions 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: 2,230 kg at 4.35 m, 815 kg at 9.75 m.

Lifts (kg)	2,230	1,525	1,140	815
Reach (m)	4.35	6.09	7.9	9.75

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

Product details · BLZ90K4TJ

4.6 Ton Knuckle Boom Marine Crane BLZ90K4TJ

The BLZ90K4TJ is a 4.6 t knuckle boom marine crane with a maximum lifting moment of 9 t·m. It runs on a recommended 15 kW power supply with 25 L/min of hydraulic flow at 28 MPa, weighs 1420 kg and offers 360° slewing.

BLZ90K4TJ at our Xuzhou factory (0:55)

Knuckle Boom Marine Crane

Product technical advantages

High-strength steel structure

Compact, light and strong steel structure.
Custom installation

Pedestal mounting tailored to your deck.
Optional attachments

Winch, drill pipe, basket or grapple.
Operation modes

Manual levers, overhead seat or wireless remote.
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

01

Assembly

Slewing base, column and booms are assembled by hand in our Xuzhou workshop.
02

Marine test stand

Mounted on a deck-style stand, the crane runs every boom and slewing motion before release.
03

Final check

Finished cranes are inspected and lined up for dispatch.
04

Packing

Wrapped in film and strapped to protect paint and hydraulics in transit.
05

Container loading

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

Shipping & warranty

Shipping, warranty and documents

How the BLZ90K4TJ reaches you, and what happens after it arrives.

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

Marine Cranes Brochure

PDF · 12 pages · 8.3 MB

Download PDF
Dimensions and load chart
BLZ90K4TJ Specifications

FAQ