Knuckle Boom Marine Cranes
Previous model No longer in regular production. It can still be built to order.
Current model View SQ8ZA6TJ 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 · SQ8ZA4T
The SQ8ZA4T is a 8 t knuckle boom marine crane with a maximum lifting moment of 16.7 t·m. It runs on a recommended 25 kW power supply with 40 L/min of hydraulic flow at 28 MPa, weighs 2470 kg and offers 360° slewing.
Capacity class
8 t
Max lifting moment 16.7 t·m
Knuckle boom sections
4
1 main boom + 3 hydraulic booms
Hydraulic flow
40 L/min
28 MPa · 25 kW recommended
Need more than 8 t? The next class up is the SQ10ZA6TJ at 10 t. For lighter loads, the SQ6.3ZA4TJ at 6.3 t is the class below.
Before ordering, check that the vessel's hydraulic supply can deliver 40 L/min at 28 MPa. We recommend 25 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
40 L/min at 28 MPa. We recommend 25 kW of hydraulic power. Send us the vessel's hydraulic data and we confirm the match when we quote.
The SQ8ZA4T 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.
| Model |
Current model
SQ8ZA6TJ
8 Ton Knuckle Boom Marine Crane
|
Previous model
SQ8ZA4TThis model
8 Ton Knuckle Boom Marine Crane SQ8ZA4T
|
Previous model
SQ8ZA4TJ
8 Ton Knuckle Boom Marine Crane SQ8ZA4TJ
|
Previous model
SQ8ZA5TJ
8 Ton Knuckle Boom Marine Crane SQ8ZA5TJ
|
|---|---|---|---|---|
| Capacity | 8 t | 8 t | 8 t | 8 t |
| Max lifting moment | 16.7 t·m | 16.7 t·m | 16.7 t·m | 16.7 t·m |
| Self weight | 2730 kg | 2470 kg | 2550 kg | 2650 kg |
| Boom sections | 6 | 4 | 4 | 5 |
| Recommended Power | 25 kW | 25 kW | 25 kW | 25 kW |
| Hydraulic System Flow | 40 L/min | 40 L/min | 40 L/min | 40 L/min |
| Hydraulic System Pressure | 28 MPa | 28 MPa | 28 MPa | 28 MPa |
| Oil Tank Capacity | 160 L | 160 L | 160 L | 160 L |
| Rotation Angle | 360° continuous | 360° | 360° | 360° |
| Winch | Included | – | Included | Included |
| Max. radius | 14.68 m | – | – | – |
| Max. height | ≈ 17 m | – | – | – |
| Max. boom angle | 84° | – | – | – |
| Built to order | View SQ8ZA6TJ |
Related products
6.3 t · Knuckle Boom SQ6.3ZA4TJ
Moment13.2 t·m
Self weight1.74 t
View Details
6.3 t · Knuckle Boom SQ6.3ZA5T
Moment13.2 t·m
Self weight1.73 t
View Details
8 t · Knuckle Boom SQ8ZA6TJ
Moment16.7 t·m
Self weight2.73 t
View Details
10 t · Knuckle Boom SQ10ZA6TJ
Moment21 t·m
Self weight2.92 t
View Details
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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