Heavy equipment machinery

May 7, 2007

What are Feller Bunchers?

Filed under: Feller Bunchers

The name may sound a little odd, but in the timber industry feller bunchers are serious business. Feller bunchers are used to clear cut standing groves of trees and then stack the felled logs onto special sleds called skidders for removal. Some feller bunchers use powerful hydraulic shears to clip smaller diameter trees, while others use oversized chainsaw blades or large rotary saws to slice through larger ones.

Most feller bunchers utilize one of two chassis designs, depending on the conditions on the site. Light to medium duty feller bunchers use a rubber-tired tractor chassis, similar to backhoes. Heavy duty feller bunchers or those working in muddy or uneven fields may use tracked designs also found on bulldozers. Many well-known manufacturers of farming equipment, including Case, John Deere and International Harvester, also make feller bunchers for the timber industry.

In the field, feller bunchers perform most of the same duties as human lumberjacks. Trained operators drive their feller bunchers into one end of a stand of trees and switch on the cutters or saw blades. Each tree is held in place by a hydraulically-controlled clamp as the blades cut through the tree close to ground level. The tree is then maneuvered to a skidder, essentially a giant sled which can be attached to a tractor and dragged to another area for processing.

Whenever a forestry agency orders a thinning of an existing grove, feller bunchers are generally used to minimize damage. Trees can be cut in place and moved out without collapsing on other inhabitants of the forest. Feller bunchers are also useful for wholesale removal of trees from construction sites. They can literally plow through an entire stand of trees in a few hours. Blades can also be adjusted to cut off trees at any selected height.

Much of the heavy equipment used in the logging or timber industries can be dangerous, but feller bunchers have acquired a reputation for being especially hazardous to operate. It is impossible to predict precisely how a large tree will react after being cut, and operators of feller bunchers are often placed at ground zero. The weight of the tree may pull the entire machine off the ground or errant branches may suddenly enter the driver’s compartment. The saw blades may become enmeshed in a tree, requiring a dangerous extraction. While in operation, feller bunchers cannot be rendered completely safe. For this reason, many logging operations try to limit the number of workers in the vicinity of a feller buncher in action.

http://www.wisegeek.com/what-are-feller-bunchers.htm

All About Heavy Machinery: Earth Movers

Filed under: Feller Bunchers

 What are earth movers? Are they considered heavy machinery?

‘Earth mover’ is a bit of a misleading term as it has come to encompass any heavy machine that is used in construction, engineering and agricultural projects, from mining and excavating to bulldozing, farming and combat engineering.

Specially designed for construction and engineering tasks, earth movers are also called engineering vehicles and construction equipment, specific terms that fall under the broader category of heavy machinery.

What are some examples of heavy machines that are earth movers?

There are many examples of heavy machinery, or earth movers; all you have to do is look at a construction site and you’ll see various types of heavy machines, though you won’t necessarily know their names. Well known types of earth movers include: backhoes, bulldozers, cranes, skid-loaders, forklifts, tractors and combat engineering vehicles like tanks.

Less well-known heavy machines are excavators, scrapers, pavers, front loaders, feller bunchers, rotary tillers, drag line excavators, forwarders, harvesters, drilling machines, skidders, road rollers or roller-compactors, graders and more. The list of heavy machines and earth movers could go on, but you get a general idea of the types of engineering vehicles referred to as ‘earth movers.’

What tools do they use, if any?

Earth movers use a number of attachments and tools to make the operator’s job easier. These tools range from special attachments for knocking down buildings to shovels, tracks and wheels.

Specific tools used by heavy machinery like the earth movers mentioned above include blades, buckets, backhoes, jackhammers, hydraulics, tracks, wheels and other specific attachments that allow the heavy machines to do their jobs quicker and more efficiently.

What are earth movers and other heavy machines used for?

They are used for a number of applications, from agriculture and farming to drilling and mining. Specific areas of use include civil engineering, combat engineering, construction, earthworks, excavations, mining, waste and forestry.

Who makes heavy machines and earth movers?

A number of manufacturers and companies make heavy machines like earth movers, from the well known Deere & Co. to Caterpillar and Bobcat. Some major players in the field of heavy machinery manufacturing include JCB, Komatsu, CASE, Ingersoll Rand, Hitachi, Atlas, Daewoo, Volvo, Demag, Koering, Pierce Pacific, Poclain, Skaggit, Kubota, The Liebherr Group, O &K, Terex, Timberjack and Madill. Many others exist as well, and the heavy machine engineering industry continues to boom throughout the US and the rest of the world.

Tigercat forestry and logging equipment: feller bunchers

Filed under: Feller Bunchers

Tigercat builds premium quality feller bunchers because high production, long service life and minimal unscheduled downtime are the keys to profitability.

Drive-to-tree feller bunchers
Tigercat has four models in the drive-to-tree feller buncher series. Combined with six saw and shear felling head options, you can customize a Tigercat feller buncher to your specific applications.

The 718 is quick, compact and maneuverable, the ultimate plantation thinning machine. The 720D and 724E feller bunchers are versatile in selective-cut and final fell applications.

The 726D is Tigercat’s largest wheel feller buncher, best suited to high production final felling and tough terrain.

Tigercat drive-to-tree feller bunchers are well-known as the most reliable and productive.

870 feller buncher with ER boom system
Swing-to-tree870 feller buncher
Tigercat track feller bunchers are field-proven in some of the harshest applications and climates on the planet, including Canada’s north and the shovel logging applications of the American southeast.

The 860/870 series feller bunchers have been completely redesigned. The C-series machines have an improved cooling package, better service access and an all-new cab.

The 822 and L830 zero tail-swing feller bunchers are suited to thinning and final-felling.

http://www.tigercat.com/fel-bun.htm

909J Feller Buncher

Filed under: Feller Bunchers

Mountains Into Molehills

The new J-Series Feller Bunchers feature a four-way leveling system with smooth cushioned control that gives you the stability you need in steep-sloped and rough-ground applications. 294 peak horsepower delivers all-out, best-in-class multi-functioning, and the new high-visibility cab features an in-the-floor cab window that greatly improves the operator’s sight line to the ground conditions.

The 909J comes standard with the new FS22B head, and the high-rotation FR22B is optional.

A Harvester, Too

Talk about versatility – the 909J can be used for harvesting applications. It incorporates the leveling system, stability, power, and reliability of the Feller Buncher application, and adds the purpose-built harvesting boom with the choice of two Waratah™ heads.
These versatile Waratah harvesting heads (HTH622B and HTH624) are highly productive whether working at the landing, roadside, or felling and processing in the woods.

http://www.cableprice.co.nz/Equipment/JohnDeererForestry/FellerBunchers/909J/index.aspx

Feller Buncher and Feller Forwarder

Filed under: Feller Bunchers

Feller Buncher
    
     

    A Feller Buncher is a mobile machine, either rubber tired or tracked, with a power plant, operator enclosure, and an articulating extensible arm onto which a felling head is attached. The felling head consists of grappling devices and either a disc saw or chain saw. The operator moves the machine into position in front of a tree and maneuvers the felling head to the tree trunk. The grappling devices wrap around the tree and the saw severs the tree from the stump. The machine then takes the severed vertical tree and lowers it into a horizontal position onto a pile or bunch of trees on the ground, hence the term feller buncher.
    

    A Feller Forwarder is a feller buncher with a bunk to the rear of the operator into which the felled trees are lowered and carried to the next tree to be felled. The process is repeated until the bunk is full. The machine then moves or forwards the trees to the landing and unloads them. The machine then moves back into the woods to repeat the cycle.

http://www.osha.gov/SLTC/etools/logging/mechanical/fellerbuncher/fellerbuncher.html

May 3, 2007

Sporax Applicator for Feller-Bunchers

Filed under: Feller Bunchers

Annosum root rot affects conifers throughout the Northern Hemisphere, leading to root rot, windthrow, and ultimately, the death of infected trees.

The fungus Heterobasidion annosum causes annosum root rot.  The fungus colonizes readily on freshly cut stumps.  Partially cut stands have a high risk of infestation because the fungus can colonize on each of the stumps, potentially leading to the loss of many residual trees.

Wind and rain carry the annosum spores.  Spores that land on freshly cut stumps grow down the stump’s root system, where they can infect living trees through root grafts or root contacts. 

Once annosum becomes established, it can remain active for many years in the South and for several decades in the North.  In the South, the hazard rating for annosum root rot is based on soil type.  We conducted our preliminary tests at the Department of Energy’s Savannah River Site in South Carolina.  Stands of conifers on sandy, well-drained soils there are classified as high hazard.

The primary method of controlling annosum in partially cut stands is by applying Sporax to the stump immediately after cutting.  Sporax is a commercial powdered formulation of borax.  Its primary active ingredient is boron.  USDA Forest Service engineers have devised an applicator system that attaches to a feller-buncher, allowing the operator to treat the stump immediately after the tree has been cut.

The applicator uses an air compressor located behind the feller-buncher’s cab.  A hopper holds the Sporax.  A mechanism in the hopper controls the amount of powder being applied.  Compressed air delivers the Sporax powder to a nozzle behind the cutting head.

borax treatment web

Figure 1.  Sporax treatment of a stump

borax treatment 2 web

Figure 2.  Sporax nozzle location

feller buncher web

Figure 3  Feller-Buncher in operation

The modular design allows timber purchasers to adapt the applicator to virtually any feller-buncher.  During timber harvest, the operator cuts the tree, positions the nozzle of the applicator over the stump and activates the system, applying Sporax to the tree stump.

Results

The system was tested in September 1997 on a 9-acre tract and again in May 1998 on a 29-acre tract.  After treatment with borax, stumps retained enough boron to prevent annosum root rot.

Total additional cost for treatment                     $13.36 per acre

Material cost of Sporax (borax)
plus 0.5 % Methylene Blue dye.                       $8.00 per acre

($0.16 per stump with approximately 50 trees per acre removed.)  Each pound of borax treated 10.5 stumps.

Additional treatment time and
applicator attachment depreciation.                  $5.36 per acre

Treatment required an additional 6 seconds per tree (3.1 seconds for treatment plus 2.65 seconds on average to keep the borax reservoir filled).  The cost of the feller-buncher (includes typical downtime) and operator was estimated at $61.02 per productive machine hour (PMH).  The cost of the feller-buncher without treatment on 50 acres per acre removal was $10.34 per acre compared to $15.70 per acre with treatment.

Depreciating 100% of the $3500 cost of the attachments over 3 years (including repair and maintenance) adds $1.94 per PMH to the machine cost.

This publication reports research involving pesticides.  It does not contain recommendations for their use, nor does it imply that the uses discussed here have been registered.  All uses of pesticides must be registered by appropriate State and/or Federal agencies before they can be recommended.

CAUTION: Pesticides can be injurious to humans, domestic animals, desirable plants, and fish or other wildlife - if the are not handled or applied properly.  Use all pesticides selectively and carefully.  Follow recommended practices for disposal of surplus pesticides and pesticide containers.

treatment rig web

Figure 4.  Schematic of sporax applicator and components

http://www.bugwood.caes.uga.edu/factsheets/98-030.html

From Logger to Feller Buncher

Filed under: Feller Bunchers

Over the years, the life of the logger, this king of Canadian forests, has greatly changed.

Du b&ucirccheron à la b&ucirccheuse

In the beginning, one can see the first forest workers like the heirs of trappers and coureurs des bois.  Indeed, his mobility, his taste for adventure and risk, his quest to surpass himself, but especially his spirit of independence characterize the Canadian logger, until the arrival of feller bunchers, timberjacks and other forestry equipment.

The historical course that we propose clarifies a quite particular evolution.  The logging trade has not evolved, or not much, from primitive times up to 1945.  Until this date, man still measured himself with nature.  It was an equal weapon fight between them.  As from after Second World War, mechanization modifies the rules of the game. 

Thus, the task to log trees, which had constituted, during millennias, a way of life for men in close relationship with nature, changes sufficiently during the second half of our century to lose many of its traditional characteristics.  Our journey thus presents the following stages: 

  1. before mechanization (from Adam to 1945) - «jack monoloy était fringant…»
  2. the chain saw (1950) 
  3. the feller buncher (1960) 
  4. the forwarder (1990);
Du b&ucirccheron à la b&ucirccheuse
The "Precision" Saw, Precision Parts,
Mtl., 1946 collection: Lauradin Veilleux

In the morning leaving with the sun…

From 1950 to 1980, the logger’s gear consisted of: 

  • his lunch box 
  • his saw 
  • some files 
  • some oil 
  • some gas.

With new safety requirements which were added in the mid-Seventies, a safety hat and safety pants were added to the logger’s gear. 
   
"La démesure"

Du b&ucirccheron à la b&ucirccheuse
IEL, end of the Forties,
Lebel Chain Saw collection. 

According to several former loggers, current forest work is no longer measured on a human scale, but rather on a machine scale.  In this substitution of human work by forest equipment, one can see a somewhat alienated explanation.  Today, a logger, at the end of his day, sees more the work of his machine than his own work. 

For those "which had always worked with horses (…)  It was the beginning of the end of the only way of life they knew.  Some even felt an intense feeling of hatred towards these "bundles of scrap" (…)"  -translated from the novel "La mort du b&ucirccheron", by Desgroseillers, 1994.
   
Mechanization (1965)

At the beginning, when the first skidders arrived, some guys used to call them, a little pejoratively, the "guédounes".  Arthur Desgroseillers provides an explanation which, although humourous, remains interesting.

"…it folds in the center, it shakes its rear end and it goes everywhere (…) It is not stopable.  Nothing can stop it!" - translated from the novel "La mort du B&ucirccheron", by Desgroseillers, 1994.
 

Unions (1945 and over)

The first unions entered the forest field around 1945.  At this time, they especially and most exclusively touched workers of large companies.

Du b&ucirccheron à la b&ucirccheuse
Homelite model 7-19, beginning of the Fifties,
collection: Claude Auclair

Immigrant loggers (Finn, Ukrainians, Irishmen) had a lot of influence on the development of unions. 

Unionization brought some positive results, such as:

  • standardization of working conditions; 
  • greater job security; 
  • better safety practices on the work place;
  • better wages and; consequently, 
  • better living conditions.
The camps (1945-1965)

There were two types of forest camps; company camps and "batch camps". 

The first are more confortable with their kitchen, their dry room, their common room and their dormitories.

The batch camps were generally built on the work site by the workers themselves which left them there once their work was over.
 

The work day (1960-1970)

A good work day, for a logger cutting wood for paper companies, consisted in bringing out 20 to 25 cut trees, pruned and piled.  In order to do so, he worked from dawn to dusk..  


Mechanization, before and after

Before: 

  • isolation of the worker; 
  • independence / self sufficiency; 
  • pride of achieved work;
  • great freedom and mobility; 
  • no safety;
  • difficult, but stimulating, working conditions.
After: 
  • settling process; 
  • greater dependence on the employer; 
  • more constraints, norms and standards; 
  • better safety;
  • healthier, but more routine, working conditions; 
  • more controled way of life.
Du b&ucirccheron à la b&ucirccheuse
Partner ‘Oregon’, the Seventies

Portrait of a logger (1955-1975)

  • individualist;
  • proud of his achieved work; 
  • a certain myth of the logger status.  Some sort of king.  A myth which was reinforced and which was maintained by comparing the performances of each one.  Some established themselves a reputation which exceeded the limits of a territory; 
  • independent, the logger could quit as there was plenty of work.  He was thus in a privileged and enhanced position.
A job at the rythm of the seasons

Winter cut:  went from October to the end of December.

Haul cut: which consisted in bringing the wood out, went from December to the spring.  As long as the ground was frozen. 

Debarking cut: which exclusively consisted of pulp wood for paper companies.  It was necessary to remove bark from the trees as soon as possible to prevent rotting.  This cut took place in spring.  

The job

From 1945 to 1975, pulpwood logging was done by strips.  Which means that the logger had a strip of forest of approximately 66 feet wide by 500 feet deep.  All the stages (felling, cross-cutting, trimming and piling) were done manually.  The logger could make his strip in one month to one month and a half.  During this time, he was paid at piece rate. 

Du b&ucirccheron à la b&ucirccheuse
"Fabtec Forwarder", 1998

http://www.ecohearst.com/english/m_saw.html


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