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Knuckle Boom Truck Mounted Cranes

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8 Ton Knuckle Boom Truck Mounted Crane

Model SQ8ZA4SQ8Z Series

Choose your configuration

3 configurations in this series

Boom sections

1 main boomStandard

Compared with SQ8ZA6: Max reach ⁦−4.16 m⁩ · Lifting height ⁦−4 m⁩ · Self weight ⁦−400 kg⁩

Max lifting capacity
8,000kg
Max lifting moment
16.7t·m
Max reach
10.52m
Lifting height
≈ 13m
Self weight
3,050kg
8 Ton Knuckle Boom Truck Mounted Crane SQ8ZA4

Engineering data

Technical Specifications

SQ8ZA4

Model code explained

SQ
BOB-LIFT crane
8
8 t capacity class
Z
Knuckle boom
A4
1 main boom + 3 hydraulic booms

Choose your configuration

Model Configuration Max reachLifting heightSelf weight
SQ8ZA4 A4 10.52 m ≈ 13 m 3,050 kg
SQ8ZA5 A5 12.63 m ≈ 15 m 3,250 kg
SQ8ZA6 A6 14.68 m ≈ 17 m 3,450 kg

Lifting

Max Lifting Capacity
8,000kg
Max Lifting Moment
16.7t·m
Rotation Angle
360°
Max Working Radius
10.52m
Max Lifting Height
≈ 13 m
Max Boom Angle
84°

Hydraulics and power

Recommended Power
25kW
Hydraulic System Flow
40L/min
Hydraulic System Pressure
28MPa
Oil Tank Capacity
160 L

Machine

Self Weight
3,050kg
Outrigger Span
2310–5610 mm
Compare all Knuckle Boom Truck Mounted Cranes

Figures from the BOB-LIFT technical drawings. Confirm the final specification with our team before ordering.

Dimensions and load chart

SQ8ZA4 dimension drawing and technical parameters

SQ8ZA4 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: 8,000 kg at 2 m, 1,420 kg at 10.52 m.
Lifts (kg) 8,000 3,700 2,470 1,820 1,420
Reach (m) 2 4.46 6.45 8.47 10.52

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

Product details · SQ8ZA4

8 Ton Knuckle Boom Truck Mounted Crane SQ8ZA4

8 t knuckle boom truck mounted crane

More videos4

Series video: it shows a crane of the same capacity and boom type, so paint and options can differ from this model.

More videos

The SQ8ZA4 is an 8 ton knuckle boom truck crane. It lifts 8,000 kg at 2 m, 3,700 kg at 4.461 m and 1,420 kg at its full 10.515 m reach, with a maximum lifting moment of 16.7 t·m and 360° slewing. The crane itself weighs 3,050 kg.

What the 8 ton SQ8ZA4 is built for

The SQ8ZA4 folds its boom into a compact package behind the cab: stowed, it is 2,460 mm wide and 2,340 mm high. It takes about 1,031 mm of chassis length behind the cab. It suits heavy trucks handling steel, precast concrete and machinery, and building sites where loads must be set down well away from the truck.

Rated capacity always depends on radius. At 8.465 m the SQ8ZA4 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.

Load at each radius

2 m 8,000 kg
4.461 m 3,700 kg
6.445 m 2,470 kg
8.465 m 1,820 kg
10.515 m 1,420 kg

Figures from the SQ8ZA4 load chart with the boom horizontal. Do not lift more than the chart shows at your working radius. Download the SQ8ZA4 load chart (PDF)

Mounting it on your truck

Your body builder mounts the crane on the chassis behind the cab, using these figures from the dimension drawing:

Crane length along the chassis 1,031 mm
Outrigger span 2,310–5,610 mm
Width of the crane when stowed 2,460 mm
Height of the crane when stowed 2,340 mm
Hydraulic supply 40 L/min at 28 MPa, about 25 kW
Oil tank 160 L

Send us your truck make, model and wheelbase, and we check that the chassis and power take-off suit the crane before you order. Download the SQ8ZA4 dimension drawing (PDF)

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 truck cranes · How to choose a knuckle boom crane

Optional attachments

  • Hydraulic gripper opened and closed by its own cylinder to grab and release loads.
  • Clamshell bucket for loading, unloading and light digging of waste, chippings and soil.
  • Orange peel grab for scrap and bulk material.
  • Timber grapple for logs and timber.
  • Auger for tree-planting holes, utility poles, foundation piles and soil sampling.

Certification

The SQ8Z series holds a CE certificate of conformity under the EU Machinery Directive 2006/42/EC.

  • 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

Choosing the right model

Need more than 8 t? The next class up is the SQ10ZA6 at 10 t. For lighter loads, the SQ6.3ZA5 at 6.3 t is the class below.

Before ordering, check that the truck's power take-off can deliver 40 L/min at 28 MPa. We recommend 25 kW of hydraulic power. Its self weight of 3050 kg adds to the load on the truck, so allow for it in the payload.

Knuckle Boom Truck Mounted Crane

Product technical advantages

  • High-strength welded structure

    High-strength welded structure

    Welded high-strength plate with a hexagonal boom section.

  • Box-type outriggers

    Box-type outriggers

    Box outriggers above 6.3 t protect the cylinders.

  • Optional attachments

    Optional attachments

    Winch, auger, basket or grapple on request.

  • Operation modes

    Operation modes

    Manual levers, aerial seat or wireless remote.

  • Dual four-bar linkage

    Dual four-bar linkage

    Reverse-angle reach for tight jobs.

  • Dedicated torque limiter Load moment limiter on every crane, safety certified.
  • Large-span outriggers Wide fixed outriggers, manual flip optional.

Manufacturing & delivery

From our workshop to your port

  1. Assembly 01

    Assembly

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

  2. Load test 02

    Load test

    The crane lifts test weights through its working range before release.

  3. Final check 03

    Final check

    Finished cranes are inspected and lined up for dispatch.

  4. Packing 04

    Packing

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

  5. Container loading 05

    Container loading

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

Shipping & warranty

Shipping, warranty and documents

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

FAQ

Questions about the SQ8ZA6

About the SQ8ZA6

What hydraulic supply does the SQ8ZA6 need?

40 L/min at 28 MPa. We recommend 25 kW of hydraulic power. Send us the truck's power take-off data and we confirm the match when we quote.

What warranty and minimum order apply to the SQ8ZA6?

The SQ8ZA6 carries a 12-month warranty, and you can order from 1 unit.

Can the SQ8ZA6 lift 8 tons at full reach?

No. It lifts 8,000 kg at 2 m, and the capacity falls with radius to 850 kg at 14.68 m with the boom horizontal. Check the load chart on this page at your working radius.

How high can the SQ8ZA6 lift?

With the boom raised to 84°, the hook reaches about 17 m above the ground. Check the load chart for the capacity at the radius you will work at.

How much space does the SQ8ZA6 need on the truck?

It needs 1,153 mm of installation space behind the cab and folds to 2,460 mm wide and 2,340 mm high. The outriggers extend from 2,310 mm to 5,610 mm, and the crane weighs 3,450 kg. Send us your truck model and wheelbase so we can confirm the fit.

What is the difference between the SQ8ZA6 and the SQ8ZA6+1?

The SQ8ZA6+1 adds one manual jib section to the end of the boom. It reaches 16.8 m instead of 14.68 m and lifts 650 kg at full reach, and the crane weighs 3,500 kg instead of 3,450 kg.

Can the SQ8ZA4 lift 8 tons at full reach?

No. It lifts 8,000 kg at 2 m, and the capacity falls with radius to 1,420 kg at 10.515 m with the boom horizontal. Check the load chart on this page at your working radius.

How much space does the SQ8ZA4 need on the truck?

It takes about 1,031 mm of chassis length behind the cab. The outriggers extend from 2,310 mm to 5,610 mm, it stands 2,340 mm high when folded, and it weighs 3,050 kg. Tell us the truck model and wheelbase and we confirm the fit.

What hydraulic power does the SQ8ZA4 need?

40 L/min at 28 MPa, about 25 kW, usually taken from the truck's power take-off. The crane carries a 160 L oil tank and weighs 3,050 kg, so allow for the crane and its oil in your payload calculation.

What warranty comes with the SQ8ZA4?

12 months on the whole crane, with common spare parts dispatched within 48 hours.

How far can the SQ8ZA4 reach, and how far does it slew?

With every section unfolded it works out to 10.515 m and still holds 1,420 kg there, and the column turns through 360°. Park so that your heaviest regular load sits inside the radius the chart allows.

Can the SQ8ZA5 lift 8 tons at full reach?

No. It lifts 8,000 kg at 2 m, and the capacity falls with radius to 1,160 kg at 12.63 m with the boom horizontal. Check the load chart on this page at your working radius.

How much space does the SQ8ZA5 need on the truck?

It takes about 1,031 mm of chassis length behind the cab. The outriggers extend from 2,310 mm to 5,610 mm, it stands 2,340 mm high when folded, and it weighs 3,250 kg. Tell us the truck model and wheelbase and we confirm the fit.

What hydraulic power does the SQ8ZA5 need?

40 L/min at 28 MPa, about 25 kW, usually taken from the truck's power take-off. The crane carries a 160 L oil tank and weighs 3,250 kg, so allow for the crane and its oil in your payload calculation.

How far can the SQ8ZA5 reach, and how far does it slew?

With every section unfolded it works out to 12.63 m and still holds 1,160 kg there, and the column turns through 360°. Park so that your heaviest regular load sits inside the radius the chart allows.

Not answered here?

Send us your question and our team replies with answers for your site.

+86 158 5249 9415

Ordering and service

Which configuration should we choose for this model?

Send the working conditions, destination and site access details to BOB-LIFT. The engineering team will confirm a practical configuration before quotation.

Can the crane be customized for our working conditions?

BOB-LIFT can adjust configuration around lifting radius, site access, operation scenario and destination requirements.

What is the typical delivery time?

Lead time depends on the configuration, order quantity and destination. We confirm it in writing with your quotation.

What export documents are provided?

Each order ships with a commercial invoice, packing list and bill of lading, plus the product documents required for the confirmed order.

Do you provide installation and operation training?

We can mount the crane on your truck before shipping. For installation on site, our team provides installation guidance and remote technical support, and our Service & Operation page has short videos on checks before and during lifting.

What after-sales support is available?

Cranes carry a 12-month warranty. Send the model, serial number and a photo or video of the issue; our team guides the repair and ships the parts.

Guides and news

Read before you buy

All news

Need a crane matched to your site and lifting task?

Send your working radius, load requirement, site access, destination country, and delivery schedule. BOB-LIFT will help match a practical configuration.

Contact Engineer

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