2017 International Forest Industries Magazines October November 2017

The 30RH-II is a heavier and more robust head for track-based harvesters and excavators up to 25 t Kesla is a Finnish technology group well known to the forestry space as a leading international harvester head manufacturer. The extensive Kesla range covers both roller and stroke harvester heads for professionals, from small thinning heads up to heavy-duty heads for clear cuttings and processing at landings. At Elmia this year, Kesla the new series of large heads, replacing the existing 28RH and 30RH models. The new, modular series of the heads includes three different models, 27RH-II, 28RH-II and 30RH-II, and a wide range of options. The Kesla 27RH-II is a light but powerful head for large rubber- wheeled harvesters and excavators up to 20 t in capacity. The head features 2WD feeding with the Kesla’s unique variable roller angle linkage. With three delimbing knives and short frame design, it offers exceptionally high power-to- weight ratio a nd excellent features for processing curved trees and eucalyptus. The Design of the 28RH-II is similar to the 27RH-II, but it is equipped with four delimbing knives and the option of 2WD or 3WD synchro-feeding. The 30RH-II is a heavier and more robust head for track-based harvesters and excavators up to 25 t. It has, like the 28RH-II, four delimbing knives and it can be equipped with whether 2WD or 3WD synchro-feeding. Max sawing diameter of the new heads is 780 mm with JPS R5500 saw unit, and max delimbing force is 36 kN. The new heads suit coniferous to hardwoods, according to Kesla. It includes lots of options to equip the head to different working conditions, from the borealis coniferous woods to hardwoods or processing and debarking of eucalyptus and acacia. and quality, leading to improved durability and longer service life. Overall, the design is much more protected, offering better protection for hoses and sensitive components, meanwhile serviceability has also been improved. “Altogether, the new heads have more than 100 improvements, compared with the old ones, that lift them to a totally new level,” the manufacturer stated. Improved performance, durability and reliability Performance of the new heads has been greatly improved by the new hydraulics, valves, hosing and feeding motors. Feeding and sawing power especially has increased remarkably. The length and diameter measuring systems have been redesigned for better measuring accuracy to meet the highest standards in the industry. For debarking applications, the heads can be equipped with optional length encoders in the feed motors and optical butt-end sensor. The sturdier frame construction includes many changes and more mechanized parts to further improve manufacturing accuracy The Kesla 30RH II The Kesla 27RH-II is a light but powerful head for large rubber-wheeled harvesters and excavators up to 20 t in capacity International Forest Industries | OCTOBER / NOVEMBER 2017 49

2017 International Forest Industries Magazines October November 2017 | Page 51