SP Maskiner - Model SP 761 LF -Heavy Duty and High Performance Harvester Head
The SP 761 LF is a compact, heavy duty and high performance harvester head. It is designed according to SP´s Low Friction principle for minimum friction and maximum productivity. The SP 761 LF is suited for working on both large wheel based harvesters as well as tracked harvesters and excavator carriers.
The high capacity in combination with the compact, protected and heavy duty design makes the SP 761 LF able to handle a variety of different demanding harvesting applications with great performance. Regardless if the task at hand is in large diameter soft wood, crooked and limby hardwood or dense mixed wood stands you can count on the SP 761 LF to get the job done. Equipped with the specially designed processing knives and a topping saw the SP 761 LF becomes a dedicated processing head with great performance processing decked wood out of a pile. The SP 761 LF truly is a compact and heavy duty all-rounder. The SP 761 LF reaches top performance in stands with a diameter of 25 to 50 cm (10 - 20”)
The SP 761 LF reaches top performance in stands with a diameter of 25 to 50 cm (10 - 20”) bhd, but is thanks to the LF principle also capable of efficiently working larger tree sizes.
- 1750kg: Weight
- 75cm: Cutting diameter
- 20-56cm: Optimum tree size (DBH) for highest productivity
- 26-30MPa: Recommended working pressure
Hydraulics
- Min. pump capacity: 250 l/min
- Rec. working pressure: 30 MPa
Feeding
Proportional clamping pressure of the feed rollers in relation to trunk diameter, individual settings for different species for optimum performance.
- Roller motors: 934, 1043, 1248 cc
- Max. opening: 700 mm
- Feed speed: 0-6 m/s
- Feeding force: 46 kN
- Proportional pressure: Yes
Cutting
The SuperCut 100 is a very powerful saw unit with integrated chain lubrication and hydraulic tensioning of the chain. Together with SP’s QuickCut, this optimises cutting time and minimises the risk of cutting cracks.
- Cutting diameter: 750 mm
- Chain speed: 40 m/s
- Saw motor: 32 cc
- Saw unit: SuperCut 100
- QuickCut: Yes
- Tow sawing (option)
- Cutting diameter: 380 mm
- Chain speed: 40 m/s
- Saw motor: 20 cc
- Saw unit: JPS
Delimbing
Proportional delimbing knife pressure in relation to trunk diameter for minimum friction and maximum production. Individual setting of upper/lower knives and for different tree species for optimum performance.
- Movable knives: 3
- Fixed knives: 2
- Delimbing diameter tip to tip: 510 mm
- Delimbing diameter incl. lower knife: 550 mm
- Min. delimbing diameter: 40 mm
- Proportional pressure: Yes
- LogHold: Yes
Weight and dimensions
Despite its enormous capacity, the SP 761 LF is suitable for more than just large-diameter felling thanks to its compact design.
- Width closed: 1400 mm
- Width open: 1920 mm
- Height: 1850 mm
- Weight: 1680 kg
- Height with top saw (option): 2030 mm
- Weight with top saw (option): 1850 kg
Recommendations
Carriers
The SP 761 LF can be fitted to both conventional forest machines and excavators. In order to ensure good function, please consult your nearest SP dealer or SP staff.
Felling
Proportional clamping pressure of the feed rollers in relation to trunk diameter, individual settings for different species for optimum performance.
- Optimum trunk diameter*: 25 - 50 cm
- Max. rec. trunk diameter*: 55 cm
* Diameter at breast height, measured 1.3 m up the trunk.
The delimbing knives are cast in high-strength steel and equipped with long cutting edges. This means that the limbs are cut off instead of being broken off. This minimizes friction during delimbing and allows the trunk to be fed through easily.
Proportional pressure ensures that the harvester head automatically works at the correct pressure in relation to tree diameter. This means that the friction between the trunk and harvester head is minimized and that the harvester head run at peak efficiency. Individual settings per tree species maximises production further.
LogHold is an evolution of proportional pressure and means that the delimbing knife pressure against the trunk can be reduced, without the risk of the trunk being dropped. If the trunk is about to fall, LogHold regulates the knife pressure so that the trunk is held in the right position. The amount by which the diameter may increase before LogHold takes action is set in the control system. No additional sensors are required.
This smart solution means that when the harvester head is fully open, i.e. at maximum tree size, the feed rollers are at their greatest angle and provide maximum carrying force against the trunk. As the feed rollers carry the trunk, the pressure on the delimbing knives can be reduced, which means less friction and the harvester head can feed the trunk through quickly and easily.