Tech Update - Harvesting/Processing Heads
By Joan Cronk
The PF-48 and PD-57 are especially suited for harvesting conditions in the Northwest. The PF-48 is a fixed 4-roller head with a 24-inch maximum cutting diameter and feed speed of 16 ft./sec. It is ideal for select thinning or where more control of the head is required. The valve body is mounted on the carrier, so it does not receive the shock load of those that are mounted on the head. The PD-57 is the largest processing head in the line with a 26-inch maximum cutting diameter and feed speed of 16 ft./sec. It’s built to handle big hardwood and process trees with lots of limbs. The PD-57 is a dangle head and has specially designed, extended delimbing arms, which allow for easy log selection from a pile. www.forestpro.com
The workhorse of harvesting heads, the HTH624C is most productive in wood 20 inches and consistently larger. The HTH624C top saw-cut capacity has been increased from 16 inches to 20 inches to provide greater access to larger trees, while a new C design sawbox improves harvesting applications, and a stronger tilt bracket and delimb knives boost strength and reliability. www.johndeere.com
In 2006, Hahn began offering the new, high-performance version of its HSG series harvester heads. The all-new “B” models feature digitally controlled, proportional, hydraulic valves with high pressure/high flow capability. The new hydraulic system enables the HSG “B” series to take full advantage of most modern excavator hydraulic systems and dramatically improves felling, delimbing, and bucking performance. www.hahnmachinery.com
Arbro harvesting heads can fell, delimb, and cut to length, making them time and cost-effective tools for smalltimber operations. The Arbro 400 handles trees up to 14 inches and the Arbro 1000 can handle up to 18 inches.
The harvesters have an automatic stroke with a length of 29.5” versus 26”, and a tree can be delimbed by pressing a single button. Eight differentpre-selectedlengths may be programmed in. Any length can be chosen at any time. The delimbing and grip knives will open separately. (A free video is available.) www.hakmetusa.com
Valmet heads handle large diameters and work fast in limby wood. The heads deliver superior clamping and delimbing capabilities, fast working speeds, auto-chain tensioning, and feature component-coordinated design. The control system maximizes operator productivity and reduces costs. Valmet’s Maxi control system is well known for outstanding measurement accuracy and allows operators to adjust settings and trouble-shoot without leaving the cab. Valmet also offers an economical bar-saw felling head with fast cycling and big-tree directional felling capability (up to 33”). www.komatsuforest.com
The 10000XT was designed as a 25-inch processing head with powerful 1404cc wheel motors, integrated topsaw, and high performance saw motors. Sticking to the Log Max philosophy, the 10000XT was engineered to fit on smaller carriers, which decreases total package price while increasing efficiency and productivity. The design gives you a rugged frame structure without packing on the weight. This combination leads to all around savings without compromising durability. www.logmax.com
An additional valve section provides more flow to the Titan 22’s drive system for greater speed and feed power, as well as to the butt saw for faster, cleaner cuts. A swing-away top saw location provides easy access to saw components. Servicing the Pierce Titan 22’s hydraulic and electrical systems is fast and easy with the hinge-away electrical platform. Structurally, the heavy-duty frame has been designed to reduce and evenly distribute stress loads, while providing extra support. In addition, the Titan’s heavy-duty hanging bracket features single-piece construction for greater durability.
Shared on all Pierce and Denharco delimbers and processing heads, the Titan 22 is powered by the Windows-based Intellitec Measuring System, with color touch screen, real-time diagnostics and troubleshooting, and e-mail, internet, topographical mapping, and more.
For larger timber, there’s the Titan 23 for 25-35 metric ton machines. The Titan 23 is designed to process 90-95 percent of what a 24” sized head is capable of, without the added investment in head and machine. www.piercepacific.com
It also includes many other innovative features, such as reliable radial piston motors, adjustable grip pressure for initial feed stages, lock connection of feed motors, ingenious control functions for front and rear delimbing blades and feed rollers, controlled feed acceleration and deceleration reducing feed damage. The PONSSE H7 harvester head has a short frame compared to its size and it handles curved trees skillfully. www.ponsse.com
Intermittent models range from 22” to 29” maximum cut capacity and have a powerful swing saw. Heads also have either 40 or 360-degree tilt system.
Controlled-fall 5660 Harvesters provide a maximum capacity of up to 24” cut and 22” processing. A swing sawcomes standard on this model, designed for CTL/TL harvesting and roadside processing.
Quadco is the exclusive distributor for KETO heads in both North and South America. Keto offers 5 models K 51, K 100, K 150, K 600TS, and K 825TS. All Keto heads feature a unique track feeding system offering excellent grips on logs and better accuracy for measuring. Their light-weight robust design cannot be overlooked.
Quadco’s new addition, the 32” BAR SAW head, is available witha40 or 360-degree tilt system, as well as being available as a fixed-mount to suit your application. www.quadco.com
The TH575 features a Motomit IT computer system, which is programmable for up to eight species and has 100 preset selections per species. The TH575 also has a cutting capacity of 27.5” and an optional 31.5”. And it’s fast, with a feed speed of 19.7 ft/sec. The head also comes with a variety of options, including top saw, a variety of feed rollers and measuring wheels, floating top knife, and more. www.tigercat.com
The HTH626 has large synchronized feed rollers, superior drive power, precise delimbing pressure, and superior grab arm and body design, making it ideal for processing decked wood, tree length falling, and CTL applications. It handles up to 34-inch decked wood and trees 26 inches and larger.
Waratah says the HTH624C has more hours of reliable continuous harvesting of larger, second-growth timber than all competing heads. It is most productive on wood 20 inches and consistently larger and proven in final felling of wood up to 30 inches.
The HTH622B, a popular head for 20- to 25-ton carrier classes, can fell up to 22-inch trees and process from decked or piled wood.
The HTH616 is perfect for harvesting plantation operations, with superior thinning and CTL capabilities and final felling of wood up to 16 inches. www.waratah.net
Recent enhancements to the Cat® HF201 for track feller bunchers have improved the saw’s durability and performance. The head is more robust as a result of structural changes, including a box section frame design, thicker plating, and reinforcement plates in high stress areas. A larger saw base heel provides better protection of the saw disc and teeth when moving debris or heeling the machine with the boom. A new saw drive shaft system boosts the bearing and shaft load capacity 50 percent and improves component service life.
Other enhancements improve tree handling. A larger, flatter surface improves the head’s contact with the tree for better support and control of large trees and to prevent stem breakage. A redesigned grab arm also helps to improve tree control and reduce stem damage. Maintenance is easier now through a side access panel to the hydraulics and the saw motor. www.forestpro.com
Gilbert Products, Inc.
Available in 22”, 24”, and 28” cutting size, the new L Series has been designed specifically for western conditions: more power, stronger frame, and better access and protection of the hydraulic components. Each head model is equipped with Gilbert saw blades (one piece disc, bolt-on, or welded segments) and is also available with 40 or 220-degree lateral rotation. www.gilbert-tech.com