8 Ton Knuckle Boom Marine Crane

Where the 8 ton SQ8ZA4T fits

The SQ8ZA4T has no winch, so loads hang from the boom hook: that suits deck cargo, barge work and quay handling where the lift stays above deck level. With a self weight of 2,470 kg and a Ø1,000 mm base plate, it is meant for barges, cargo vessels and quays with a strong, engineered pedestal.

Rated capacity always depends on radius. At 8.465 m the SQ8ZA4T lifts 1,820 kg and at 10.515 m it lifts 1,420 kg, so check the weight of your heaviest regular load at the distance you need before you choose a tonnage.

We size a marine crane by the load and the radius you need, not by vessel length. Send us the heaviest load, the furthest point it must reach and a deck drawing, and we check them against the SQ8ZA4T load chart.

Load at each radius

Figures from the SQ8ZA4T load chart with the boom horizontal. Do not lift more than the chart shows at your working radius. Download the SQ8ZA4T load chart (PDF)

Deck mounting dimensions

These figures come from the SQ8ZA4T dimension drawing. Your shipyard or naval architect designs the pedestal and the deck reinforcement for the crane’s 2,470 kg self weight and its 16.7 t·m maximum lifting moment.

We can adapt the mounting to your vessel’s deck, for example by changing the pedestal height. Download the SQ8ZA4T dimension drawing (PDF)

Corrosion protection for sea duty

The T in SQ8ZA4T marks the marine version, which receives a multi-layer anti-rust treatment for salt air and spray. How long a crane lasts in a harbour still depends on routine care: rinse it with fresh water after salt-water work, grease the slewing bearing and pins on schedule, and check hoses and fittings for corrosion.

Warranty and service

BOB-LIFT covers the whole crane for 12 months. Common spare parts leave the factory within 48 hours, and our service team answers within 12 hours and can guide repairs by video. Cranes ship from Lianyungang, Qingdao or Shanghai.

All knuckle boom marine cranes · How to choose a marine crane

Where the 8 ton SQ8ZA4TJ fits

The SQ8ZA4TJ has a winch on the boom, so the hook hangs from a rope: that helps when loads go down into a hold or onto a boat or quay below deck level. With a self weight of 2,550 kg and a Ø1,000 mm base plate, it is meant for barges, cargo vessels and quays with a strong, engineered pedestal.

Rated capacity always depends on radius. At 8.465 m the SQ8ZA4TJ lifts 1,820 kg and at 10.515 m it lifts 1,420 kg, so check the weight of your heaviest regular load at the distance you need before you choose a tonnage.

We size a marine crane by the load and the radius you need, not by vessel length. Send us the heaviest load, the furthest point it must reach and a deck drawing, and we check them against the SQ8ZA4TJ load chart.

Load at each radius

Figures from the SQ8ZA4TJ load chart with the boom horizontal. Do not lift more than the chart shows at your working radius. Download the SQ8ZA4TJ load chart (PDF)

Deck mounting dimensions

These figures come from the SQ8ZA4TJ dimension drawing. Your shipyard or naval architect designs the pedestal and the deck reinforcement for the crane’s 2,550 kg self weight and its 16.7 t·m maximum lifting moment.

We can adapt the mounting to your vessel’s deck, for example by changing the pedestal height. Download the SQ8ZA4TJ dimension drawing (PDF)

Corrosion protection for sea duty

The T in SQ8ZA4TJ marks the marine version, which receives a multi-layer anti-rust treatment for salt air and spray. How long a crane lasts in a harbour still depends on routine care: rinse it with fresh water after salt-water work, grease the slewing bearing and pins on schedule, and check hoses and fittings for corrosion.

Warranty and service

BOB-LIFT covers the whole crane for 12 months. Common spare parts leave the factory within 48 hours, and our service team answers within 12 hours and can guide repairs by video. Cranes ship from Lianyungang, Qingdao or Shanghai.

All knuckle boom marine cranes · How to choose a marine crane

Where the 8 ton SQ8ZA5TJ fits

The SQ8ZA5TJ has a winch on the boom, so the hook hangs from a rope: that helps when loads go down into a hold or onto a boat or quay below deck level. With a self weight of 2,650 kg and a Ø1,000 mm base plate, it is meant for barges, cargo vessels and quays with a strong, engineered pedestal.

Rated capacity always depends on radius. At 8.51 m the SQ8ZA5TJ lifts 1,820 kg and at 10.56 m it lifts 1,420 kg, so check the weight of your heaviest regular load at the distance you need before you choose a tonnage.

We size a marine crane by the load and the radius you need, not by vessel length. Send us the heaviest load, the furthest point it must reach and a deck drawing, and we check them against the SQ8ZA5TJ load chart.

Load at each radius

Figures from the SQ8ZA5TJ load chart with the boom horizontal. Do not lift more than the chart shows at your working radius. Download the SQ8ZA5TJ load chart (PDF)

Deck mounting dimensions

These figures come from the SQ8ZA5TJ dimension drawing. Your shipyard or naval architect designs the pedestal and the deck reinforcement for the crane’s 2,650 kg self weight and its 16.7 t·m maximum lifting moment.

We can adapt the mounting to your vessel’s deck, for example by changing the pedestal height. Download the SQ8ZA5TJ dimension drawing (PDF)

Corrosion protection for sea duty

The T in SQ8ZA5TJ marks the marine version, which receives a multi-layer anti-rust treatment for salt air and spray. How long a crane lasts in a harbour still depends on routine care: rinse it with fresh water after salt-water work, grease the slewing bearing and pins on schedule, and check hoses and fittings for corrosion.

Warranty and service

BOB-LIFT covers the whole crane for 12 months. Common spare parts leave the factory within 48 hours, and our service team answers within 12 hours and can guide repairs by video. Cranes ship from Lianyungang, Qingdao or Shanghai.

All knuckle boom marine cranes · How to choose a marine crane

Where the 8 ton SQ8ZA6TJ fits

The SQ8ZA6TJ uses six boom sections to reach 14.68 m and still lift 850 kg there, while folding to 2,454 × 1,219 mm. It suits barges, small cargo vessels, quays and work pontoons that move cargo across a wide deck or from a boat moored alongside. It needs 40 L/min at 28 MPa, so check the vessel’s hydraulic supply early.

Need a longer, straight boom instead? Compare the 8 ton telescopic boom marine crane (SQ8SA5T).

We size a marine crane by the load and the radius you need, not by vessel length. Send us the heaviest load, the furthest point it must reach and a deck drawing, and we check them against the SQ8ZA6TJ load chart and the deck space it needs when folded.

Deck mounting dimensions

These figures come from the SQ8ZA6TJ dimension drawing. Your shipyard or naval architect designs the pedestal and the deck reinforcement for the crane’s 2,730 kg self weight and its 16.7 t·m maximum lifting moment.

We can adapt the mounting to your vessel’s deck, for example by changing the pedestal height. Download the SQ8ZA6TJ dimension drawing (PDF)

Corrosion protection for sea duty

The T in SQ8ZA6TJ marks the marine version, which receives a multi-layer anti-rust treatment for salt air and spray. How long a crane lasts in a harbour still depends on routine care: rinse it with fresh water after salt-water work, grease the slewing bearing and pins on schedule, and check hoses, fittings and the winch rope for corrosion and wear.

From our customers

A customer in Bahrain has sent photos of the earlier SQ8ZA4T configuration. See their photos under Customer feedback

All knuckle boom marine cranes · How to choose a marine crane