Knuckle Boom Marine Cranes
Previous model No longer in regular production. It can still be built to order.
Current model View SQ4ZA3T View SQ4ZA3TJ Compare with the current range
Confirm your configuration and current availability with our team.
Engineering data
Figures from the BOB-LIFT brochure for this range. Confirm the final specification with our team before ordering.
Compare all Knuckle Boom Marine CranesDimensions and load chart
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Product details · SQ4ZA4T
4 t knuckle boom marine crane
More videos2
Series video: it shows a crane of the same capacity and boom type, so paint and options can differ from this model.
More videosThe SQ4ZA4T is a 4 t knuckle boom marine crane with a maximum lifting moment of 8.4 t·m. It runs on a recommended 14 kW power supply with 25 L/min of hydraulic flow at 26 MPa, weighs 1260 kg and offers 360° slewing.
Capacity class
4 t
Max lifting moment 8.4 t·m
Knuckle boom sections
4
1 main boom + 3 hydraulic booms
Hydraulic flow
25 L/min
26 MPa · 14 kW recommended
Need more than 4 t? The next class up is the BLZ90K4TJ at 4.6 t. For lighter loads, the SQ3.2ZA3TJ at 3.2 t is the class below.
Before ordering, check that the vessel's hydraulic supply can deliver 25 L/min at 26 MPa. We recommend 14 kW of hydraulic power.
Knuckle Boom Marine Crane
Compact, light and strong steel structure.
Pedestal mounting tailored to your deck.
Winch, drill pipe, basket or grapple.
Manual levers, overhead seat or wireless remote.
Reverse-angle reach for flexible work.
Manufacturing & delivery
01
Slewing base, column and booms are assembled by hand in our Xuzhou workshop.
Mounted on a deck-style stand, the crane runs every boom and slewing motion before release.
03
Finished cranes are inspected and lined up for dispatch.
04
Wrapped in film and strapped to protect paint and hydraulics in transit.
05
Loaded into containers at the factory and shipped to your port.
Shipping & warranty
Lead time and container loading are confirmed with your quotation.
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
FAQ
25 L/min at 26 MPa. We recommend 14 kW of hydraulic power. Send us the vessel's hydraulic data and we confirm the match when we quote.
The SQ4ZA4T 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.
Send the working conditions, destination and site access details to BOB-LIFT. The engineering team will confirm a practical configuration before quotation.
BOB-LIFT can adjust configuration around lifting radius, site access, operation scenario and destination requirements.
Send the working conditions, destination and site access details to BOB-LIFT. The engineering team will confirm a practical configuration before quotation.
Send the working conditions, destination and site access details to BOB-LIFT. The engineering team will confirm a practical configuration before quotation.
Send the working conditions, destination and site access details to BOB-LIFT. The engineering team will confirm a practical configuration before quotation.
Send the working conditions, destination and site access details to BOB-LIFT. The engineering team will confirm a practical configuration before quotation.
Model history
Previous models are configurations we no longer build as standard. They can still be built to order.
SQ4ZA4TThis model
4 Ton Knuckle Boom Marine Crane SQ4ZA4T
Related products
Guides and news
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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