SP 591 LX G3 logo

SP 591 LX G3 - high speed debarking for xtreme jobs

The SP 591 LX G3 is purpose built for harvesting and debarking of the most difficult species of plantation grown eucalyptus and acacia. It is an extremely strong and tough harvester head, designed according to the LX principle for maximum reliability and productivity even under the toughest conditions.

The uncompromised LX design is to be found all throughout the harvester head, from large components like frame and knives down to pins and seals. In spite of its brute and tough appearance the SP 591 LX G3 does not just offer strength and reliability, smart solutions like proportional pressures in combination with an unprecedented debarking efficiency and a great handling of crooked trees also make the SP 591 LX G3 an extremely fast, productive and fuel efficient harvester head – the SP 591 LX G3 truly offers high speed debarking for xtreme jobs.

The SP 591 LX G3 is optimized for best productivity and performance handling tree sizes from 10 to 38 cm (4-15”) and is equally productive debarking at the stump as it is processing and debarking decked wood out of a pile.


All of our harvester heads have smart, useful functions. Click on the circles if you would like to know more.

Technical data

Learn more about the technology behind our various harvester heads. Here you will find everything from information about cutting and delimbing to weights and dimensions.


Min. pump capacity: 166 l/min
Rec. working pressure: 25-30 MPa


Proportional clamping pressure of the feed rollers in relation to trunk diameter, individual settings for different species for optimum performance.
Roller motors: 500/315, 630/400 cm³
Max. opening: 640 mm
Feed speed: 0-7 m/s
Feeding force: 24 kN
Proportional pressure: Yes


Extremely robust and powerful Hultdins SuperCut 100 saw unit with integrated chain lubrication and hydraulic tensioning of the chain.
Cutting diameter: 600 mm
Chain speed: 40 m/s
Saw motor: 20 cc
Saw unit: Automatic – SuperCut 100


Delimbing knives with proportional pressure. Individual settings for different species for optimum performance.
Movable knives: 2
Fixed knives: 2
Delimbing diameter tip to tip: 430 mm
Min. delimbing diameter: 30 mm
Proportional pressure: Yes
LogHold: Yes

Weight and dimensions

Despite its extremely robust design, the SP 591 LX G3 has a moderate weight and can therefore be used on a variety of different carriers. Thanks to its compact height, the SP 591 LX G3 can handle crooked and irregular timber efficiently and without difficult.
Width closed: 1250 mm
Width open: 1550 mm
Height, excl. tilt frame: 1670 mm
Weight, excl. rotator: 1800 kg


The SP 591 LX G3 can be fitted to a variety of different carriers, such as conventional forest machines and excavators. In order to ensure good function, please consult your nearest SP dealer.
Proportional clamping pressure of the feed rollers in relation to trunk diameter, individual settings for different species for optimum performance.
Optimum tree size (DBH) for highest productivity*: 10 - 38 cm
Max. rec. trunk diameter*: 40 cm
* Diameter at breast height, measured 1.3 m up the trunk.

We reserve the right to change specifications and design. Harvester heads pictured may have some extra equipment. All stated measurements/values are approximate and refer to standard equipment.

LX – because extreme jobs allow no compromise

LX stands for Logging Xtreme. The harvester heads in the LX series are designed to cope with the most extreme conditions. Thanks to a number of smart design solutions, the LX harvester heads offer a maximum productivity, performance and uptime together with a minimum need for service and maintenance.

The harvester heads are extremely strong and hard-wearing, but thanks to proportional pressure, SP’s patented LogHold and SP’s computer software, they are also fast, efficient and easy to work with.

Accessories and equipment

The SP 591 LX G3 can be supplied with a range of accessories to adapt the harvester head to different needs, carriers and felling conditions. The most common accessories are described below.

For more information, contact your nearest SP dealer.

A or E frame

Separate length measuring unit

Feed motors

Feed rollers

3/4” saw unit

Find end sensor

Complete measurement and control system

Control Systems

Compatible with most control systems

SP 661 LF can be used with virtually all control systems on the market. Through a simple adaptation the SP 661 LF can be used together with the following systems:

  • Dasa280
  • Dasa380
  • Dasa4
  • Dasa4 Compact
  • Dasa Forester
  • John Deere Timbermatic
  • Motomit IT
  • Motomit PC
  • Komatsu MAXI
  • Ponsse Opti
  • Technion
  • Techno Matic
  • TOC-MD
Control Systems

Complete control systems

SPd5Bucking is a complete measurement and control system for control of the felling process in a forest harvester in accordance with StanForD. This is our most advanced system and has support for value bucking. The system is also fully integrated with dasa5 control and communication system. All communication with the operator is via dxPc, which is a mobile PC with Windows 10 operating system, and stores all information, e.g. statistics or instructions. The dxPc computer has a touchscreen, which facilitates the work for the operator considerably.

SPd5BuckingPrio is our intermediate system. The system has support for priority bucking and is equipped with a PC. SPd5BuckingPrio is a slightly impler bucking system combined with the power of a PC for reporting, communication and other programs. Bucking is based on priority lengths with or without diameter classes. SPd5BuckingPrio is ideal when value bucking and reporting is not required according to StanForD at the same time as needing a PC for reporting, communication and other PC-programs. All communication to the operator occurs via dxPc.

SPd5BuckingPrio-C is a bucking system that focuses on simplicity without compromising on head control, performance or productivity. SPd5BuckingPrio-C has support for priority bucking with or without diameter classes and has been specially developed for felling where there is no need for wireless production reporting or the use of PC programs. SPd5Bucking Prio-C runs the Windows CE operating system.

SPd5 cab box
Regardless of which system you choose above, you can get it with our SPd5 cab box. The cab box allows SPd5 cab modules do be installed quickly, efficiently and at the highest quality. The cab box is factory-fitted at SP and delivered completely finished and tested together with the head, which ensures a correct connection and trouble-free commissioning. Thanks to the electronics modules being mounted in a protected environment inside the box, problems caused by external damage such as moisture, dust, dirt and impact are minimized.