May June 2005




Harvesting and Felling Heads

AFM-Forest Ltd
The AFM 60 L is an effective larger head for wheeled-base machines. It is a reliable choice for tough work with a maximum grapple opening of 650 mm, felling diameter of 700 mm and cutting diameter of 600 mm. The AFM 60 L provides good capacity and power for bigger final clear cuttings. Because of compact design, it is light enough to be movable inside later thinning. The head is equipped with one pair of delimbing knives and non-sliding three-roller feeding, which provides a high quality output and ease of handling with even the worst quality trees. As a carrier, 12-17 ton forest machines are recommended.

The DHT650 Series II processor is suited to all operating conditions: hardwood or softwood, tree length or cut-to-length. The DHT650 Series II offers power and performance without sacrificing productivity or precision. It offers the best combination for high productivity and low cost per hour and is 50 percent faster than the average of any other unit on the market, says the manufacturer, with an impressive feed speed of 20 ft/sec. The processor features heavy-duty structure, the choice of rubber or steel feed rollers, high quality "Poclain" motors available in two displacements, high-speed trimming and butting saws with automatic lubrication and chain tensioning system. The new Dasa 4 measuring and control system offers accuracy, a user-friendly environment and dollar value optimization in tree length, long logs or short wood production. The DHT650 Series II offers fast positioning in felling or processing mode, synchronized delimbing arms and feed rollers with proportional pressure, a grab arm and feed roll concept, a fixed frontal knife, interchangeable and heavy-duty saws, a topping saw adapted to crosscutting forked limbs and automatic chain tensioning. The selfcleaning measuring wheel configuration is adapted to tree species and offers constant pressure and better contact with the stem. Other features include faster, simpler saw blade changes with Jet Fit bars, and heavy-duty, bolt-on guarding for easy access to butting saw.

Fabtek Corp. (a Blount Company) builds both fixed and dangle-style heads. The fixed style FT18R four-roller design suits loggers harvesting in a range of operational styles from select cut hardwood to multiple-stem, first thinning of pine plantations. This head has a 24" cutting capacity. Features include multiple encoder measurement sensors, a standard auto chain tensioning system and simplified piston oiler, as well as an optional high-speed saw system that allows the fixed heads to reduce cutting cycle times down to equivalent dangle head speeds. The dangle-style FT180 has a 22" cutting capacity, while the FT240 has a 26" cutting capacity. Both heads perform well in both hard and softwood applications. The 3/4 pitch high-speed bar and chain design on the units, as well as on the fixed head, have helped bring reduced maintenance and high reliability into the tough harvesting conditions seen in many logging areas.

Hahn Machinery
The Hahn HSG140 and HSG160 undergo continuous product improvement, including a new encoderless length measuring system with sealed sensors, a new diameter measuring system, stronger frames, new controls and other improvements that make the heads more productive and reliable. The HSG series of singlegrip harvester heads are readily adaptable to most small excavators or rubber-tired machines in the 18,000- to 25,000-lb range, or 65- to 85-hp range. The economical, full-featured harvester heads are available in both new and rebuilt models.


Log Max
Log Max the manufacturer of harvesting and processing heads in North America recently introduced the new Log Max IT computer control system. This system uses state-of-the-art six-wire Can bus technology and new log optimization software. At the 2005 Oregon Logging Conference, Log Max introduced the 12000 head designed for big wood applications. The 12000 has all the traditional Log Max design benefits which include; low flow requirements, strong frame design, proven rubber roller technology and industry leading pulling force for the ultimate coastal and hardwood processing head. Log-Max now offers six models of harvesting and processing heads, all having the Log Max patented knife positioning system to minimize friction losses while maximizing pulling force. The 7000 and 9000 heads have variable displacement feed roller motors that automatically provide the best combination of speed and pulling power as needed. Cast delimbing knives with standard bottom knife provide improved tree control and high quality delimbing. The 9000 weighs 3,980 lbs with cutting diameter for 28.5" and feed force of 9,350 lbs. The 7000 weights 3,710 lbs with cutting diameter of 25". The 5000 weighs 1,881 lbs. with 22" cutting diameter. The 3000 weights in at 1,155lbs with a cutting diameter of 20".

KESLA manufactures eight different models of roller heads under the trademark Foresteri. The Foresteri model line up includes the 30RH, the 30RHS, the 25RH, the 22RH, 20RH, 20RHS, 18RH and the 18RHS. All of them offer delimbing speeds of up to five meters / second (17 ft/second) with force ranging from 14kN ( 3500lbs) to 30kN (6800lbs). The maximum sawing diameter ranges from 450 mm (18") to 750 mm (30") . The machines weigh between 430kg and 1,400 kg. The control systems of the units use state-of-the-art components for maximum efficiency and ease of use. KESLA manufactures two different models of stroke heads under the trademark Patu. The two stroke heads include the 1,060-lb. Patu 410SH and the 1,760-lb. 560SH, with sawing diameters of 18" and 25" respectively. Delimbing force is 9000 lbs. for the 410SH and 14000 lbs. for the 560SH. The stem is processed with strong double jaws for a firm but gentle grip on the stem. Both can be used as processors, processing wood from a pile, and the heads are controlled by push buttons on the crane control levers.

Keto is one of the oldest harvester/processor manufacturers with over 3,000 heads made. The Keto family consists of nine different groups: K51, K100, K150, K500, K525TS, K604PHD, K800TS, K804PHD and K1000TS. The traditional models have two moving knives while the LD4 and HD4 models have four knives/arms. TS models have a top saw, and the PHD is a dedicated on-landing processor. All Keto heads feature track feeds, which offers a long, firm and very powerful yet gentle grip around logs. The track feed in turn provides an excellent base for dual length measuring, which is second to none in the industry today. More important Keto features: built-in rotator, simplest hydraulic system, excellent weight/capacity ratio, and dependable computer system.

Komatsu Forest—Valmet
Valmet Komatsu Forest has manufactured nearly 4,000 harvesting/ processing heads globally, and offers a full line of engineered harvesting heads in all sizes. For North America, this includes the new, stronger 360.1 and 370.1 models, the heavyduty 380-Maxi and 385-Maxi models (powered by the Valmet's MaxiHead control system), and the massive 395 harvesting/processing head. Valmet heads handle largediameter stems and tough-limbed mixed stands. These heads deliver superior clamping and delimbing capabilities, fast feed and cutting, working speeds, chain options, and component-coordinated proven design. The MaxiHead control system maximizes productivity and reduces operating costs. It provides accurate measuring and allows operators to adjust harvesting preferences and perform trouble-shooting functions from the comfort of the cab. Timbco - Valmet also offers a proven, lightweight, durable and compact design bar-saw felling head, with fast cycling and big tree directional felling. This head is capable of making up to 33" diameter cuts.  or

Pierce Pacific Manufacturing
The superior design of the PTH 20XL and PTH 24XL tree harvesters allow for easy harvesting at the stump or processing from a log deck. An independent measuring wheel circuit and superior pulse signal resolution offer unprecedented accuracy and maximum log utilization. And with power exceeding 12,000 pounds of feed force, Pierce harvesters offer the highest output in their class, says the manufacturer. At the stump, the harvester heads’ heavy-duty hanging bracket, 3/4" pitch butt saw system and 340 rotation capability make felling faster and more efficient. Export quality delimbing knives, powerful feed rollers and the 404-pitch top saw make final delimbing and bucking simpler, too. Processing from a log deck is just as easy. Bi-directional delimbing knives are extended at the tips to make for easy picking from any log deck.

Ponsse harvesting heads offer durability, reliability, easy servicing and accurate measurements. Six different models in three classes cover everything from thinning to final felling. The H60 is a midsized head and can be fitted with two to four hydraulically- operated delimbing knives and one stationary knife, while the H60e and H60BW have three to five hydraulically operated delimbing knives and one stationary knife. HW60 comes equipped with four hydraulically-operated knives. The H60 head features the Ponsse Opti information system, has force feed of 26 kN and range from 850 to 1,000 kg. The H73 is designed for large-dimensioned trees with one to two stationary and four hydraulically movable knives. The 1,150 kg head has a maximum opening of 700 mm and a saw bar length of 750 to 825 mm. The H53 is a multi-purpose head for smaller trees, with a 640 mm saw bar.

Quadco Equipment
Quadco's harvester/processor head line-up includes the Controlled-fall Series and the L-Series Processors. The controlled fall Series, formerly known as Ultimate, is available in 22" cut (5600) and 24" cut (5660). That series fits 22t class excavators or bigger or purpose-built feller bunchers. The accumulator arms, and solid mount are designed for CTL/TL harvesting as well as for roadside processing. The new 5660 swing saw, the same as that used on the 2400 intermittent felling head, puts out 147 hp at the saw, a 63% increase over the 5600 saw.


Risley Equipment
The newest addition to Risley Equipment's line of attachments is the Premio LSeries of Dangle Processor/Harvester Heads. The unique feed roll geometry ensures fast gripping and good support of softwood stems in all weather conditions, resulting in superior log quality while maintaining high productivity. The Premio L550 is a versatile all around head for thinning and final felling, suited for carriers in the 13-20 ton range. The L750 is a powerful head for clear felling and processing. The L750 is best utilized on a 20 to 25 ton carrier. The biggest in the L-Series is the L950, designed for clear felling and tree length operations. A 30 ton carrier and the L950 handle the big wood. All models are available in either two or four-wheel drive. The Rolly II controlled head single grip harvester is ideal for sensitive harvesting applications. The Rolly II is available with a bar saw or RotoSaw butt saw with a 24" cut capacity. Measuring is a DASA system combined with a Risley trail wheel. Options allow configurations to suit specific applications. The Cobra and Sidewinder processors feature a Hultdins bar saw top and bottom for fast precise cuts. Coupled with a DASA measuring system and steel drive feed rolls or rubber chain back rolls for fast, accurate processing, the Cobra and Sidewinder processors have controlled mounting bracket assemblies with 290 degrees of rotation and full float capability for accurate long log processing.

The Rotobec RSG-250B singlegrip harvesting head has a felling and delimbing capacity of 25". Component locations have been chosen to facilitate maintenance and minimize hose movement. Components, including hoses and wires, are tidy and well protected. The RSG-250B is the only harvesting head in its class to offer a continuous rotator—the R-6500—that con-siderably reduces potential damage to hose and wires and related downtime, the company says. Installation of the RSG-250B requires only three hydraulic lines and a fourwire electrical cable on the boom. All valves are located directly on the harvesting head. Chain saw oil is used to lubricate the blade and chain. Asmall oil reservoir is located on the head. The RSG-250B comes with the Motomit computer and offers length, diameter and volume measuring. It can be installed on nearly any track or wheel carrier with a minimum of 130 hp.

Waratah’s HTH hydraulic tree harvesters handle all types of harvesting applications and are available in the 600, 400 and 200 series. The 600 series heads have either a 0.404" SuperCut saw unit—featuring automatic chain tensioning with an electric pulse oiler for greater bar and chain life—or a durable 3/4" pitch 11H chain on the larger heads. A saw home detector stops feed rollers during cutting and the bar saver indicator light lets the operator know where the saw is at all times. The heads feature the Waratah’s Logrite and T10 measuring and control systems. The HTH622B for 20 to 25 ton carrier classes offers improvements over the earlier HTH622. Weighing 4673 lbs., the 622B is 600 lbs. lighter than the previous model. The modified main sawbox configuration allows for a lower stump height, up to a 35.5" bar and a Hultdins S100 saw unit is faster and has no external hose routing. In addition, grab arms open 3-1/2" wider to allow the head to easily process up to 24" stems. HTH 260 features a 25.6" cutting capacity. With a maximum cutting capacity of 25.6", the HTH 470 has the feeding power of constant fourwheel drive and two moving and two fixed hydraulically serial-connected feed rollers. The HTH 450—with a maximum cut capacity of 22"—is a lightweight all purpose head for thinning and regeneration harvesting. Waratah’s FS series includes high accumulation, disc saw felling heads for swing-to-tree feller bunchers. It has a cut capacity of 22" and an enlarged accumulator pocket, while the FS22 has a front discharge system. With a 24" cut capacity, the FS24 has an accumulating capacity of 4.8 sq ft.

Felling Heads

The purpose-built Caterpillardesigned felling heads are well matched to their respective machines, resulting in maximum saw speed recovery and productivity, the company says. By matching the hydraulic system to the cutting attachment, the saw heads are designed for optimum saw recovery and tree control. Caterpillar offers three models of high-speed disc saws for tracked feller bunchers. The HF181, the HF201 and the HF221 are available with either 40-degree or 220-degree wrist rotation. Heads for wheeled feller bunchers are available in single and dual-post configurations and include the HF221 and the HF222 as well as the HS20 shear head for pulpwood felling.

Davco Manu./Barda Equipment
The Davco QC1400 hot saw feller buncher model from Barda Equipment, a division of Davco Manufacturing Ltd, features an all new patent-pending, multi-tree cutting layout that decreases cycle times compared to single tree cutting systems. Designed for use with various carriers, the QC1400 has a cutting capacity of from 6" to 16" and has a 42" diameter saw disc. Overall attachment dimensions are 48" wide by 78" tall. It requires a hydraulic flow of 30 to 38 gpm and 3,300 psi. The high-speed disc saw has a 1-5/8" kerf. Other features include rotatable square teeth and a universal quick attach mount. Davco Manufacturing also offers the 1,100-lb Davco QC 1200 (quick cut) feller buncher, with a 36" diameter saw, rotatable square teeth, a universal quick attach mount and a cutting capacity of up to 14".

GN Roy
Two circular saw head models are available from GN Roy, the 2456-B and the 2252-C. The 2456-B has a greater cut depth of 24" through a 40" opening, a greater holding capacity of 5.06 square ft and 280 degree tilt (with planetary gear). The planetary gear is built with a holding bearing that is completely separate from the planetary and supports the head’s weight. With an operating pressure of 2,800 lbs, the 6,400-lb head has a saw blade 56" in diameter. The 2252-C offers great access to the saw motor, easy access to arms, accumulator cylinders and the hydraulic system, a 22" cut depth and a holding capacity of 4.28 square feet. The clamp design makes classification of wood easier. Seals are made of polymyte and are resistant to heat, cold and high pressure.

Gilbert 3000 series Felling Heads are high performance units and are the most productive on the market. They are built without compromise in order to help increase the profitability of operations. They are available with a patented high rotation wrist, in either 40 degrees or 220 degrees rotation. The felling abilities and accumulation capacity are unequalled in multiple tree gathering. They control the stems for an impeccable grouping without any crossing. The sturdiness of the units allows the same felling head to shine equally in the harvesting of hard wood and in the harvesting of the huge trees on the West Coast. Gilbert Felling Heads are designed in such a way that there is no compromise necessary between performance, safety, reliability, ease of maintenance and low operating costs. It has cutting capacities of 22", 24" or 28".

Hultdins’ versatile, continuous rotation SuperFell 851 can fell, pile, crosscut, trim, top, load and shovel. Mounted on a shovel logger, excavator or feller buncher, the high-capacity, 3,410-lb directional felling head is capable of felling trees up to 33.5" in diameter in a single cut and is ideal for large-diameter timber, selective cutting of valuable species, salvaging blow-down and clearing rights-of-way. The SuperFell 851 offers highgripping force grapple arms, a hydraulic snubber for sideto- side control, cushioned cylinders and the patented Hultdins SuperCut 300 saw unit with 11H 3/4" pitch saw chain. Automatic chain tensioning is standard. Designed for maximum hose protection, the unique upper boom link system simplifies mounting. With a rotator rated at 101,165 lbf, the SuperFell 851 is able to withstand loads in any direction and requires a 53- to 58-gpm (200 to 220 l/min) oil flow.

Loewen Forestry Equipment
In addition to the Loewen felling head, Loewen Forestry Equipment offers the 2- gearbox 350° rotate mount. It converts the existing sawhead, is simple to install — just unbolt the old and bolt on the new — and there are no extra hydraulics. With the high rotation wrist you will experience more versatility and productivity and do more than you ever thought possible, says the company. It allows the operator to cut standing trees, and wind fell trees, and place them in bigger bunches at any angle with a lot less movement of the carrier, increasing skidder efficiency — resulting in higher profits.

Madill incorporates a number of unique features into its new 25" cutting diameter hot saw. This head is specifically matched to Madill feller bunchers, but can also be purchased separately. The fully enclosed, 365-degree wrist employs two hydraulic motors coupled to planetary gearboxes for the extremely high torque needed with tall and heavy West Coast wood. Madill’s felling head has two grab arms and two accumulating arms, and internally mounted valves in order to reduce hose connections from nine to four. With boom adapter, it weighs in at 8,000 lbs. Madill has also included a number of safety improvements into the head, including front discharge, a sawblade brake and rotate and wrist "float" ability, if the operator wants the bunched stems fall under their own weight.

Quadco’s B-Series high speed saw heads, available in 20, 22 and 24 inch, work best in large timber. The patented "Arms Down" feature, specially designed to increase leverage, makes it easier to handle tall timber. Two cylinders per set of arms, instead of one cylinder with linkage, contribute to greater holding power, better tree alignment and reduced butt friction. The C-Series high speed saw heads, available in 20, 21, 22 and 24 inch are of the "Arms-up" style, for use with driveto- tree or boom-to-tree carriers. The 21SC is a 21-inch "Super Capacity" model, specially designed for small timber where high accumulation capacity and fast cycles are required. All have one cylinder and timing bar per set of arms. The Intermittent Series, available in 22, 24, 28 and 29 inch, work on a principle of stop-and-go. By stopping and retracting the ring saw, the head can perform effectively in special applications such as selective cutting, blowdown, right-of-way, steep-slope and shovel-logging. Relatively lighter than a hot saw, it is your ideal "Big Tree Solution". Quadco also produces the Bunching Series best suited for drive-to-tree carriers as well as two models of Shears with 21 inch cut capacity, available as center-post or twin-post design. All Quadco felling heads can be equipped with an optional 40-degree wrist, a 360-Standard-Hi-Torque or a 360VI "Vancouver Island Special" Extreme Duty Hi-Torque with dual pinion, well suited to Coastal timber applications.

Risley Equipment
Risley Equipment offers three High Speed and three VSaw series saw heads. The High Speed models, H1920B, H1922B and H2222B, use a unique belt drive system providing a 2:1 drive multiplier resulting in fast saw blade recovery and a clean powerful cut. The V-Saw series is comprised of the V1923L, V1923B and V2229B High Speed Intermittent saws, based on the RotoSaw intermittent design with the addition of new intelligent hydraulics for a fast, clean cut. The V-Saw is the most environmentally friendly and fuel efficient saw available today. V-Saws are available with 24" and 30" cut capacity. Saws have a choice of side rotation of 15 degrees or 45 degrees per side.

The new 5702 felling saw from Tigercat Industries Inc is available for drive-to-tree and track feller bunchers. The single-post saw head features an asymmetrical butt plate and horn design that enables it to center and control largediameter trees and bunch smaller stems in parallel alignment. Built for extreme duty and offering a cutting capacity of 23", the 5702 has arm pivot pins that are 2.5" in diameter with threaded ends. The Tigercat-built cylinders are cushioned at both ends for extended life. The Tigercat 5400 felling saw head for track feller bunchers is also a singlepost felling saw with asymmetrical geometry and an offset pocket, resulting in better stem alignment in small-diameter wood and versatility for varying timber sizes. Twin grab arms offer improved collecting, sorting and control of large trees, while the single accumulating arm provides increased bunching efficiency. The 5702 and the 5400 are available with three wrist options (30°, 110° and 140°). All wrists use annular ball bearings and heavy-duty construction. With a 21.5" cut capacity, the 5400 is designed and constructed for long life with large-diameter pins and bushings and cushioned cylinders. Tigercat's 650 harvesting head for wheeled and tracked harvesters offers efficient hydraulics for optimal fuel efficiency and a cut capacity of 26". The DASA computer system provides tight measuring tolerances and excellent control. Angled rollers provide improved feed force and reduced friction on the knives and rollers.


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This page was last updated on Sunday, August 14, 2005