The KESLA 20SH-II stroke harvester is particularly well suited to the effective processing of robustly branched trees, either standing or in piles. Processing of valuable special trees without damaging timber surface is also easy with this harvester head. Thanks to the proSTROKE partial stroke function, even the delimbing of crooked trees is efficient. The optimum diameter of trees is 25 cm. The Kesla 20SH-II suits 7-13 ton base machines.
Special attention has been paid for ease and convenience of daily maintenance. Thanks to the spacious structure of the Kesla heads, for example lubrication and change of hoses are easy to do.
The KESLA harvester heads are compatible with the common control- and measuring systems at the market. Kesla offers different versions of proLOG-system, which has superb price-quality-relation.
Besides its extensive harvester head range suiting almost all excavator models, Kesla also provides comprehensive installation services and extensive accessory packages. Options selected by customers may include, for example, an installation kit for hydraulics, measuring and control system, Xtender boom and a full range of safety equipment.
Model | Kesla 20SH-II |
---|---|
Width, head open (mm) | 950 |
Width, head closed (mm) | 855 |
Length (mm) | 1400-2150 |
Height (without rotator) (mm) | 1275 |
Weight (without rotator) (kg) | 540 |
Max. cutting diameter (mm) | 520 |
Feeding (rollers/stroke) | stroke feed |
Feed force (kN) | 41 |
Knives (pcs) | 2 moving + 1 fixed |
Diameter tip-to-tip (mm) | 330 |
Max. opening, front knives (mm) | 480 |
Max. opening, rear knives (mm) | 520 |
Operating pressure (bar) | 175-220 |
Flow required (l/min) | 100-150 |
Power required (kW) | 30-55 |
Stroke harvester suits also onto smaller basemachines, like diggers, which hydraulic oil flow would not be high enough for roller heads. Even with relatively low oil flow, stroke feed creats feed efficient enough to cut and delimber relatively big tree trunks. The product itself is produced of the same high quality materials than the roller heads. The measuring device is a part of standard delivery and equivalent to that of roller heads. The SH-heads are very widely used throughout the world.
Depending on the harvester head model, the new saw unit utilises a 34cc or 40cc Sunfab motor and 22-tooth drive wheel that enable a sufficient chain speed to be reached at approximately 5,500 rpm. The low-rpm, high-capacity motor is much more durable in use than traditional solutions and operates at much better efficiency. In practice, this manifests itself as better sawing power and lower fuel consumption.
In addition to the fuel savings, the technical solutions of the R5500 saw unit result in lower operating and maintenance costs: The saw unit utilises wide Iggesund JW-series saw bars, whose life span is many times that of traditional bars. The robust and wide saw bar bends and vibrates less, which, together with an efficient tensioner, ensures that the chain stays on in all sawing situations. The new double-sided and balanced drive wheel is designed to last for the entire service life of the harvester head.
The JPS R5500 is a compact package that does not require external saw cylinders or position sensors. The saw bar motion is driven by a turning mechanism integrated into the unit, which also includes sensors that detect the position of the saw.
According to the studies, it also produces substantially less cutting-induced crack than its traditional counterparts.
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