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EC 661 LF

A high-performance head ready for the challenge

Eco Log 661 LF




The Eco Log 661 LF is a high-performance harvester head that offers the highest levels of quality, strength, and productivity in all types of final felling. In large-diameter final felling, the proportionally angled feed rollers, in combination with the patented LogHold system and Eco Log Saw Control, deliver the highest capacity and production. In final felling of low-grade timber, the versatile design comes into its own and ensures high levels of efficiency and rapid feeding.

The low friction concept (LF), combined with extremely well-protected, smart hose routing, paves the way for minimum friction, the least possible downtime, maximum uptime, and maximum productivity. In addition, the harvester head’s variable roller motors generate an optimum balance between strength and speed in both low-grade and large-diameter stands.

The Eco Log 661 LF meets every challenge – flexibly, robustly, and efficiently.


 Proportional roller clamping pressure in relation to stem diameter, as well as individual setting by tree species for optimum performance.
 Roller motors 750 cc
 Roller motors, variable 613-920 cc
 Max. roller opening 630 mm
 Feed rate 5 m/s / 4,1-6,1 m/s
 Feed force 28 kN/34 kN
 Proportional pressures Yes
 SuperCut 150 is an extremely powerful unit with integrated chain lubrication and hydraulic tensioning of the chain. In combination with Eco Log Saw Control, the cutting time is optimized and the risk of cutting cracks is minimized.
 Cutting diameter, standard  700 mm
 Cutting diameter, option EC saw box 810 mm
 Chain speed 40 m/s
 Saw motor Bucher 32 cc
 Saw unit Automatic – SuperCut 150
 Saw control Yes
 Delimbing knives with proportional pressure. Individual setting by tree species for optimum  performance.
 Floating knives  4
 Fixed knives 1
 Delimbing diameter tip-tip 480 mm
 Delimbing diameter, incl. lower knife 510 mm
 Min. limb diameter 30 mm
 Proportional pressures Yes
 Log Hold Yes
 Weight and Dimensions
 Width closed 1360 mm
 Width open 1820 mm
 Height, excl. tilt frame 1730 mm
 Weight, excl. rotator 1480 kg
 Weight with top saw, excl. rotator 1595 kg
 Base machines: The Eco Log 661 LF is ideal for installation on Eco Log’s harvesters 580 & 590.
 Felling: Proportional roller clamping pressure in relation to stem diameter, as well as individual  setting by tree species for optimum performance.
 Recommended stem diameter (BHD) for maximum productivity* 16-51 cm
 *Breast height diameter, measured 1.3 m up the stem.  
 We reserve the right to make changes to specifications and versions. The harvester heads depicted may have some additional equipment. All specified dimensions/ values are approximate and refer to standard equipment.