Main Page


Index Page
Contractor Profile
Mill Modernization
Millyard Operations
Mill Operations
Sawmill Innovators
Saskatchewan FAQ
Industry Shows
Small Sawmilling

Calendar of Events
Reader Service
Classified Ads
Supplier Newsline

Site Information

Contact List
Past Issues Archive
Join our Listserve
Search Our Site




June 2005  - The Logging and Sawmilling Journal


Harvesting Heads


In May, Denharco announced the launch of a new line of ultra-performance harvesting heads, the Series 300. The line includes four harvesting heads weighing between 2,200 and 4,200 lbs, depending on the options chosen. The cutting capacity of the four heads varies between 21 and 28”. They are suited for cut-to-length forest harvesting operations. The company also offers the DHT650 Series II specifically designed for North American forest conditions. The Series II introduces a new DASA4 control system that includes autodiagnostic functionality, as well as a Canbus wiring communication system.


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. The 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 HSG-140 and HSG-160 single-grip harvesters are said to be ideal machines for plantation thinning and select cut operations. They offer fingertip processing controls, an electronic length measuring system, a rugged 3/4” pitch felling/bucking saw, two-speed roller feed, automatic saw oiler, and durable high strength, alloy steel construction.

They are capable of felling, delimbing, measuring and bucking. And the HGS series are readily adaptable to most small excavators or rubber-tired machines.


Hants offers the Viking 650 and 525, both sturdy machines with few moving parts. They feature a strong tilt arm to make assembling on an excavator possible, a link system for feed rollers—which gives them an angle when feeding big trees—and doubled pulse counters for diameter measuring.

Hants also offers the 400 and 1000 model Arbor-Stroke harvester. These easy-to-use harvesting heads are 616 lbs and 1,210 lbs respectively. The 400 has a F11-6 Volvo saw motor, a delimbing force of 4,850 lbs and a 14.2” maximum delimbing knife opening. The 1000 is powered by a F11-10 Volvo saw motor, has a delimbing force of 7,800 lbs and a maximum delimbing knife opening of 17.7”.


Keto is one of the oldest harvester/processor manufacturers with over 3,000 heads produced. 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 offer 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, says the company. Other important Keto features include built-in rotator, a simple hydraulic system, excellent weight/capacity ratio, and a dependable computer system.

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. Both offer over 12,000 lbs of feed force as well as variable “head tilt angle and hold” function for superior head control on windfalls, downhill grades and high decking. Variable displacement drive motors offer speed/torque when required, and in both directions.

The PBS 3440 bar saw features the same saw system as the harvester heads and delimbers. The cutting capacity is 34”, the lateral tilt is 40 per cent and it weighs 4,780 lbs. A heavy-duty frame and strong simple structure eliminates the need for reconditioning.


Ponsse’s six harvester head models come in three size classes and are diversified enough to cover thinning through to thick stem final felling. The largest head is the H73, which delimbs trees efficiently with its five delimbing knives without damaging the bark unnecessarily. The front knives are designed and positioned for delimbing down to the small top diameter, while the rear knives are designed for delimbing large-dimensioned trees from the butt-end. Next are the H60 and H60/e—mid-sized multi-purpose harvesters with a feeding force as high as 24 kN and the feeding speed can reach five m/s. Other models include the HW60, H60BW, H53 and EH2. The latest collaboration of the harvesters with the Opti is the Ponsse GentelDrive, which creates a gentler driving motion for plywood birch or other delicate assortments that minimizes damage to the surface.


Pro-Max, the distributor of Log Max harvesting and processing heads in Western Canada, recently introduced the new Log Max IT computer control system. This system uses state-of-the-art, six-wire Canbus technology and new log optimization software.

At Forest Expo, Pro-Max introduced the new Log Max 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. Pro-Max offers six models of Log Max harvesting and processing heads, all having the Log Max patented knife-positioning system to minimize friction loss and maximize 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.

Risley Equipment

The newest addition to Risley Equipment’s line of attachments is the Premio L-Series 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, ideal for sensitive harvesting applications, is available with a bar saw or RotoSaw butt saw with a 24” cut capacity. Measuring is done with 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.


The Rotobec RSG-250B single-grip 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 company says. The RSG-250B is the only harvesting head in its class to offer a continuous rotator—the R-6500—that considerably reduces potential damage to hoses and wires and related downtime, according to the company. Installation of the RSG-250B requires only three hydraulic lines and a four-wire 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. A small 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.

Valmet/Komatsu Forest

Komatsu Forest has produced over 4000 heads and offers a full line-up of engineered high-speed heads perfect for working the stump or landing. Heads include the new 360.2 and 370.2, 370E (for excavator use) models, the heavy-duty 380, 385 harvesting models, and the massive 395 processing head, all powered by the Maxi Head system.

Valmet heads handle large diameter stems and work fast in limby mixed stands. These 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. It also provides accurate measuring and allows operators to adjust for harvesting preferences and perform trouble-shooting functions 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”).


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 Waratah’s Logrite and T10 measuring and control systems. The HTH 622B for 20 to 25 ton carrier classes offers improvements over the earlier HTH 622. 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.


Quadco's harvester/processor head line-up includes the Controlled-Fall series and the L-Series processors. The controlled-fall series, also known as Ultimate, is available in 22" cut (5600) and 24" cut (5660). That series fits the 22t class excavators (or larger) 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 percent increase over the 5600 saw.


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.


Felling Heads


The purpose-built Caterpillar designed 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.

Gilbert Products

The Gilbert 3000 series felling heads are high performance units and are said to be among the most productive on the market. They are built without compromise to help loggers increase the profitability of their operations. The heads are available with Gilbert’s patented high rotation wrist, among the most widely recognized in the industry. The felling heads are outstanding in all types of operations, the company says. The heads have strong abilities in accumulation capacity 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 hardwood and in the harvesting of the huge trees on the West Coast. The 3000 series felling heads are available in three sizes: 22”, 24” and 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 35” 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 high-gripping force grapple arms, a hydraulic snubber for side-to-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.


The new 5702 felling saw from Tigercat 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 centre and control large-diameter 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 single-post felling saw with asymmetrical geometry and an offset pocket and a cut capacity of 21.5”. 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-degrees, 110-degrees and 140-degrees). All wrists use annular ball bearings and heavy-duty construction.

Tigercat’s 650 harvesting head for wheeled and tracked harvesters offers efficient hydraulics for optimal fuel efficiency and a cut capacity of 26”.

Davco Manufacturing/Barda

The new QC1400 hot saw feller buncher model from Davco Manufacturing Ltd, a division of Barda Equipment, 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 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”.

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


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, make it easier to handle tall timber. Two cylinders per set of arms allow greater holding power, better tree alignment and reduced butt friction.

The C-Series high speed saw heads, available from 20” to 24” are of the "Arms-up" style, for drive-to-tree or boom-to-tree carriers. The 21SC is a 21” "Super Capacity" model, specially designed for small timber where high accumulation capacity and fast cycles are required.

The Intermittent Series are available from 22” to 29”. By stopping and retracting the ring saw, the head performs effectively in special applications like selective cutting, blowdown, right-of-way, steep-slope and shovel logging. Quadco also produces the Bunching Series best suited for drive-to-tree carriers as well as two models of Shears with 21” cut capacity, available as center-post or twin-post design.


Email This Page to a Friend or Associate



This page and all contents 1996-2007 Logging and Sawmilling Journal (L&S J) and TimberWest Journal.
For personal or non-commercial use only.
This site produced and maintained by: Inc
Any questions or comments on this site can be directed to Rob Stanhope, Principal (L&S J).
Site Address:

This page last modified on Thursday, November 17, 2005