12 Ton Knuckle Boom Marine Crane

Where the 12 ton SQ12ZA4T fits

The SQ12ZA4T 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 3,900 kg and a Ø1,127 mm base plate, it is meant for barges, cargo vessels and quays with a strong, engineered pedestal.

Rated capacity always depends on radius. At 8.3 m the SQ12ZA4T lifts 2,750 kg and at 10.15 m it lifts 2,100 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 SQ12ZA4T load chart.

Load at each radius

Figures from the SQ12ZA4T load chart with the boom horizontal. Do not lift more than the chart shows at your working radius. Download the SQ12ZA4T load chart (PDF)

Deck mounting dimensions

These figures come from the SQ12ZA4T dimension drawing. Your shipyard or naval architect designs the pedestal and the deck reinforcement for the crane’s 3,900 kg self weight and its 27 t·m maximum lifting moment.

We can adapt the mounting to your vessel’s deck, for example by changing the pedestal height. Download the SQ12ZA4T dimension drawing (PDF)

Corrosion protection for sea duty

The T in SQ12ZA4T 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 12 ton SQ12ZA4TJ fits

The SQ12ZA4TJ 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 3,950 kg and a Ø1,127 mm base plate, it is meant for barges, cargo vessels and quays with a strong, engineered pedestal.

Rated capacity always depends on radius. At 8.3 m the SQ12ZA4TJ lifts 2,750 kg and at 10.15 m it lifts 2,100 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 SQ12ZA4TJ load chart.

Load at each radius

Figures from the SQ12ZA4TJ load chart with the boom horizontal. Do not lift more than the chart shows at your working radius. Download the SQ12ZA4TJ load chart (PDF)

Deck mounting dimensions

These figures come from the SQ12ZA4TJ dimension drawing. Your shipyard or naval architect designs the pedestal and the deck reinforcement for the crane’s 3,950 kg self weight and its 27 t·m maximum lifting moment.

We can adapt the mounting to your vessel’s deck, for example by changing the pedestal height. Download the SQ12ZA4TJ dimension drawing (PDF)

Corrosion protection for sea duty

The T in SQ12ZA4TJ 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 12 ton SQ12ZA5T fits

The SQ12ZA5T 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 4,200 kg and a Ø1,127 mm base plate, it is meant for barges, cargo vessels and quays with a strong, engineered pedestal.

Rated capacity always depends on radius. At 8.3 m the SQ12ZA5T lifts 2,750 kg and at 10.15 m it lifts 2,100 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 SQ12ZA5T load chart.

Load at each radius

Figures from the SQ12ZA5T load chart with the boom horizontal. Do not lift more than the chart shows at your working radius. Download the SQ12ZA5T load chart (PDF)

Deck mounting dimensions

These figures come from the SQ12ZA5T dimension drawing. Your shipyard or naval architect designs the pedestal and the deck reinforcement for the crane’s 4,200 kg self weight and its 27 t·m maximum lifting moment.

We can adapt the mounting to your vessel’s deck, for example by changing the pedestal height. Download the SQ12ZA5T dimension drawing (PDF)

Corrosion protection for sea duty

The T in SQ12ZA5T 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 12 ton SQ12ZA5TJ fits

The SQ12ZA5TJ 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 4,400 kg and a Ø1,127 mm base plate, it is meant for barges, cargo vessels and quays with a strong, engineered pedestal.

Rated capacity always depends on radius. At 8.3 m the SQ12ZA5TJ lifts 2,750 kg and at 10.15 m it lifts 2,100 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 SQ12ZA5TJ load chart.

Load at each radius

Figures from the SQ12ZA5TJ load chart with the boom horizontal. Do not lift more than the chart shows at your working radius. Download the SQ12ZA5TJ load chart (PDF)

Deck mounting dimensions

These figures come from the SQ12ZA5TJ dimension drawing. Your shipyard or naval architect designs the pedestal and the deck reinforcement for the crane’s 4,400 kg self weight and its 27 t·m maximum lifting moment.

We can adapt the mounting to your vessel’s deck, for example by changing the pedestal height. Download the SQ12ZA5TJ dimension drawing (PDF)

Corrosion protection for sea duty

The T in SQ12ZA5TJ 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 12 ton SQ12ZA6T fits

The SQ12ZA6T is rated to 12,000 kg and lifts 1,000 kg at 14.5 m. It 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 4,350 kg and a Ø1,127 mm base plate, it is meant for barges, cargo vessels and quays with a strong, engineered pedestal.

Need a longer, straight boom instead? Compare the 12 ton telescopic boom marine crane (SQ12SA4T).

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 SQ12ZA6T load chart and the deck space it needs when folded.

Deck mounting dimensions

These figures come from the SQ12ZA6T dimension drawing. Your shipyard or naval architect designs the pedestal and the deck reinforcement for the crane’s 4,350 kg self weight and its 27 t·m maximum lifting moment.

We can adapt the mounting to your vessel’s deck, for example by changing the pedestal height. Download the SQ12ZA6T dimension drawing (PDF)

Corrosion protection for sea duty

The T in SQ12ZA6T 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.

From our customers

Customers in Germany and Taiwan, China have sent photos and video of the earlier SQ12ZA4T configuration. See their photos under Customer feedback

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