Tech Update - Harvesting, Processing and Felling Heads

Diane Mettler 

Harvesting/Processing Heads 

Hahn Machinery  Inc continues to offer  the HSG140 and  HSG160 single-grip  harvester heads.  These simple and  compact heads are intended to fell,  delimb, and buck small timber and  have been used extensively in thinning  operations.                               

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. 
Reader Service Card #132 

Hants’ Viking 650 and 525 are 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 (giving them  an angle when feeding big trees), and  doubled pulse counters for diameter  measuring.                     

Hants also offers the 400 and 1000  model Arbro-Stroke harvesters. 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”.  Reader Service Card #133 

John Deere
John Deere has over a dozen  harvester heads to fit loggers’ application  needs. The new H480 with its longer  upper delimbing knives makes it easier  to pick-up stems, and the relocated  lower knives’ pivot points and shorter  bottom knives provide better delimbing  quality and stem control. Its 25.6” cutting  capacity can handle anything from late  thinnings to  regeneration  harvesting. The  smaller 745 is  said to be ideal  for a variety of  wood sizes in  both harvesting  and thinning  operations.                     

Its four fullysynchronized  feed rollers are driven by high-efficiency  motors which surround the stem for true  four-wheel drive. 
Reader Service Card #134 

Kerik Technologies Inc  The TreeKing PowerStroke processor  heads have been purpose-built to  revolutionize productivity in the forest  industry. The TreeKing heads will handle  a diversity of wood—from 3” to 30”, in  both soft and hardwoods. TreeKing has  over 20,000 lbs of delimbing force using  minimal hydraulic flow and can efficiently  handle lengths between 8’ and 18.5’ in  one stroke.                                  

The KTI measuring system can  automatically measure any length, or  combination of lengths, and can do a  diameter priority sort for all lengths. Its  effective multi-stemming significantly  increases productivity in small wood,  and because the measuring system is  independent of the tree, it offers very  good length accuracy, according to the  company. The absence of feed rollers  reduces potentially damaging contact to  the log during processing. And KTI’s focus  on ergonomics and process simplification  ensures reduced operator fatigue.  Reader Service Card #135 

Kesla Oyj 
Kesla manufactures eight different  models of roller heads. The line-up  includes the 30RH, the 30RHS, the  25RH, the 22RH, 20RH, 20RHS, 18RH  and the 18RHS. All of the models offer  delimbing speeds of up to five m/sec with  force ranging from 14 kN (3,500 lbs) to  30 kN (6,800 lbs). The maximum sawing  diameter ranges from 450 mm to 750  mm. The machines weigh between 430  kg 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. The two-stroke  heads include the 1,150-lb 20SH  and the 1,760-lb 560SH, with sawing  diameters of 18”  and 25” respectively.  Delimbing force is  9,000 lbs for the  20SH and 14,000 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. 
Reader Service Card #136 

Konrad Forsttechnik 
Konrad Forsttechnik (distributed by  McMass Industries) offers the Woody  harvester heads, which feature endless  rotation and a folding feature, which  makes it possible for the heads to load  CTL, pile, or do other jobs requiring a  strong grapple without  the feedrollers in the  way.                               

The company  offers a high  performance butt  saw and topping  saw. And the  accurate measuring  system with light  barrier has many  length and diameter presets. The robust  and reliable construction of the head also  qualifies it for bent logs and deciduous  trees. It also has a high feed strength.  Konrad Forsttechnik GmbH builds the  Woody harvesters in Austria and has been  producing the heads for over 16 years. or  Reader Service Card #137 

Pierce Pacific  Manufacturing 
Pierce Pacific has come out with the  Titan 22. Extensive structural analysis  has allowed the company to design a  framework free of concentrated “hot  spots,” and minimize cracking potential.  An additional valve section increases  drive power as well as butt saw speed,  allowing increased production. The  IntelliTec measuring system offers  accurate, quality logs. Easy operation  through the Windows-based colour touch  screen allows for simple performance  adjustment procedures, and easy access  troubleshooting and diagnostics.                                     

Pierce also offers the DHT 650  Series II, specifically designed for North  American forestry conditions. Its robust  frame is proven in the toughest hardwood  applications and optimizes performance  on a versatile range of carrier sizes.  The DASA 4 measuring system offers  precise, accurate quality logs. And  the Windows-based colour touch  screen allows for simple performance  adjustment procedures and easy access  troubleshooting and diagnostics. In  addition, the self-cleaning measuring  wheel assures accuracy advantages, even  in demanding applications and at high  feed speeds of up to 20 ft/sec. and  Reader Service Card #138 

Durability and dependability are  central to Ponsse harvester head design.  The harvester heads must endure extreme  stress and at the same time operate  accurately and as gently as possible,  so as not to damage the trunk surface  unnecessarily. Ponsse harvester heads  were developed in collaboration with  the users; decades of experience and  continuous product development make  Ponsse a quality leader in harvester heads,  says the company.                                     

The structure of all Ponsse harvester  heads is as simple as possible and,  considering their performance capacity,  the heads are also light. Their ease of use,  efficiency and reliability have thus been  taken to the utmost extreme. The valve  system and other central components  are protected against harsh conditions,  but are still easy to service and adjust  as necessary. The company has the new  Ponsse H8 heavy duty harvester head  and the new Ponsse EH 25 energy wood  harvester head. 
Reader Service Card #139 

Fabtek  processing heads  have been rebranded  as  Prentice, and the  line has been  expanded to  include Swedishengineered  heads,  field proven in  South America  and Europe. The  heads can be mounted on excavators and  purpose-built wheel or track harvesters  and come in a variety of sizes for both  hardwood and softwood.                                      Various high speed or high torque  motor sizes are available. Feed roller styles  include spiked, machined, debarking and  rubber with chain. Bar pitch saw systems  include .404 and 3/4” 11H. Topping  saws are optional and all saws have  automatic chain tensioning. Expander  bolts on most heads greatly increase pin  and bushing life. Built-in diagnostics make  troubleshooting simple.                      

With heavy-duty rotators and onepiece  C-frame structures, several models  are ideal for large diameter hardwoods.  The heads tilt forward to allow the  extended picking arms to grab a stem  from a deck. Feed rollers cradle the stem  with enough traction to get the job done  fast without marring the wood. 
Reader Service Card #140 

Pro-Max Services has released two  new products for the Western Canadian  market with great success—the LogMax  7000HD and 12000HD dedicated  processors. These new processor  arrangements feature a special hanging  bracket designed for faster and more  efficient processing of decked wood.  Pro-Max also provides a full line of  LogMax high performance harvesting and  processing solutions—the LogMax 4000,  5000, 6000, 7000, 9000 and the 12000.  LogMax heads from Pro-Max use the  LogMax IT control system with stateof-  the-art six-wire CANbus technology,  easy-to-read colour screen, and new log  optimization software. They also feature  strong full box section frames, a full range  of roller options, patented low friction  drive system, compound curve knives  for high delimbing quality and high feed  forces.                         

The LogMax 7000 and 9000 heads  have variable displacement drive motors  that automatically provide the best  combination of speed and pulling power  as needed.  Pro-Max is the distributor of LogMax  harvester and processor solutions in  Western Canada. 
Reader Service Card #141 

Quadco offers the controlled-fall  series. The controlled-fall series, also  known as Ultimate, is available in 22”  and 24” cut. That series fits the 22t  class excavators (or larger) or purposebuilt  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  per cent increase over the 5600 saw.  Quadco Equipment Inc is the  exclusive distributor for Keto heads in  North America. The present Quadco  offering in North America consists of  five different groups: K51, K100, K150,  K600TS and K825TS. The traditional  models have two moving knives, while  the LD4 and HD4 models have four  knives/arms. TS models have a top saw.  All Keto heads feature track feeds, which  offer an excellent grip around logs, and  the track feed in turn provides a proven  base for dual-length measuring.                             

Quadco Equipment Inc is now the  exclusive distributor for Woodstar heads  in Canada. The present Quadco offering  in Canada consists of seven different  groups: WH50, WH60, WH70, WH75,  WH95, WH105 harvesting heads and the  WS333 as the bar saw.  Reader Service Card #142 

The Rolly II harvester from Risley  controls the tree with geared rotational  control and is said to be ideal for many  types of hardwood and softwood  applications in timber up to 24”, cut to  any length, which makes this harvester  the logger’s choice. Options allow  configuration to suit applications.  The high speed continuous Rotosaw is  built with high-strength steel and quality  hydraulic components. Designed for  selective or clear felling operations, it  features a 90 degree tilt and up to a 30”  disk. The high speed intermittent Rotosaw  ensures a quality cut every time. Benefits  to the logger include high production like  a hot saw, but with minimal disturbance  of the surrounding vegetation, increased  fuel savings, reduction of fire hazard, and  less hydraulic heat generated, as the saw  only rotates when cutting.  Reader Service Card #143 

Tigercat has just introduced the  TH575 harvesting head. It is specifically  designed to match the high performance  capabilities of the Tigercat track carriers  in harvesting, processing and debarking  applications. It has a heavy-duty steel  structure for high-duty cycles and features  isolation mounted valve assemblies and  clean hose routings for maximum uptime.  Its unique three-wheel drive system  is designed for faster feed speed and  superior feeding power (8,670 lbs) and its  large diameter-measuring wheel improves  accuracy. It features a Motomit IT  computer system, which is programmable  for up to eight species and has 100 preset  selections per specie.                                 

The TH575 has a cutting capacity  of 27.5” and an optional 31.5”. It’s fast  too, with a feed speed of 19.7 ft/sec.  The TF575 also comes with a variety  of options, including top saw, a variety  of feed rollers and measuring wheels,  floating top knife, and more.  Reader Service Card #144 

Valmet/Komatsu Forest 
Valmet’s full line-up of engineered  high-speed heads work the stump or  landing. Heads include the 360.2 and  370.2 for wheeled harvesters, and the  hearty 370E, 380, and 385 models for  tracked harvesters, all controlled by  Valmet’s MaxiHead system. New in North  America is the Valmet 350, with three  feed wheels and four feed motors. Valmet  heads handle large diameters and work  fast in limby wood.                         

The heads deliver superior clamping  and delimbing capabilities, fast working  speeds, autochain tensioning, and feature  component, co-ordinated design. The  control system maximizes operator  productivity and reduces costs.  Valmet’s Maxi system is well known  for outstanding measurement accuracy  and allows operators to adjust settings  and troubleshoot without leaving the cab.  Valmet also offers an economical bar-saw  felling head with fast cycling and big-tree  felling capability and up to a 33” cut. 
Reader Service Card #145 

Waratah’s HTH hydraulic tree  harvesters handle all types of harvesting  applications and are available in the 600  and 400 series models. When big trees  are the challenge, the HTH 624 Super  and the HTH 626 Bigwood are up for  the task. Large synchronized feed rollers,  greater drive power, 3/4 pitch 11 HBC  main saw units and topping saws, all in  a touch
frame design, make these heads  unequalled in the industry, says the  company.                       

The HTH 622B harvester is the  most popular head for the 20-25 ton  carrier class. The HTH 622B features a  completely redesigned hanging bracket  and frame design for added strength and  durability. A superior grab-arm design,  along with a find end photo eye and a  Hultdins S100 saw unit, makes for quick  cycle times of decked wood for roadside  processing.  Logging & Sawmilling Journal - June 2007  techupdate  25  from page 4  to page 6  The HTH 616 is the ideal choice  for small wood processing up to 16”  diameters, all the way down to delimbing  post and rail in a mill yard. It offers all the  features of the larger HTH head but in  a smaller, more agile package for 20-ton  units. 
Reader Service Card #146 

Votec Innovation Ltd 
Votec offers a variety of processing  heads. The robust Hornet 620 has a  processing capacity of 25”, requires  no stick adapter and has multi-stem  capability using parallel drive rolls and  optional butt plate. It has a feed force of  8,125 lbs and feed speed of 18.15 ft/sec,  and is recommended for a 20 to 22-ton  carrier.                                

The larger Hornet 825 has a feed  force of 12,000 lbs, a feed speed of 14  ft/sec and a processing capacity of 30”.  There’s a fixed delimbing knife in front  of the top saw and there is a choice of  spiked, thumbnail or rubber feed rollers.  With optional high speed feed roller  motors, the 825 can achieve 17 ft/sec. It’s  best for 25-ton carriers.  The all new Hornet 720 is a purposebuilt  high speed processor with a reverse  operating format. It features an easily  programmable computerized measuring  system and large angled drive rolls offer  superior support and traction. The  proportional softclamp feature allows  the operator to adjust the pressure on  delimb arms and drive rolls for excellent  log quality. The rugged self-sharpening  delimbing arms and powerful feed force  easily remove large limbs. 
Reader Service Card #154 

Felling Heads

The QC1400 hot saw feller buncher  model from Barda Equipment, a division  of Davco Manufacturing Ltd, features new  patent-pending, multi-tree cutting layout  that decreases cycle times compared  to single tree  cutting systems.  Designed for  the RC100  Posi Track,  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. 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” trees. 
Reader Service Card #147 

Promoting sustainable forestry and  profitable logging, the new Caterpillar  500 series track feller buncher machines  have a complete line of Cat disc saw  attachments to meet felling needs.  Whether loggers are thinning in a  plantation or select cutting in large  diameter timber, a wide selection of single  post models are available with standard  40 degree partial lateral tilt, or an optional  220 degree full lateral tilt. These range  in cut capacity from 20” to 24” for zero  tail swing models (511/521/522/532)  and 22” to 24” for full tail swing models  (541/551/552) with the standard felling  front linkage. The HF 181 felling head  (20” cut capacity) is also available only  on the full tail swing models when the  long reach feller buncher linkage option is  selected.                           

Designed to allow maximum visibility  of the cutting area, all saws utilize highpressure  hydraulics for fast saw recovery  and quick arm speed. This provides a  positive impact on production and better  tree control. 
Reader Service Card #148

Endeavour Equipment 
Endeavour offers the new SliceSaw: a  self-contained intermittent ring saw that  simply bolts on any current harvester/  processor, feller, grapple or delimber  on the market, increasing attachment  adaptability. With nearly the tooth  speed of a bar saw, vastly improved  landing capacities, a cut kerf of 1-  1/8”, and a weight of only 275 lbs, the  SliceSaw increases adaptability, improves  production and ensures reliability.  It’s designed to operate in lightweight,  low flow applications, and allows the  operator to harvest more with less weight,  horsepower and cost. The innovative tool  is available to logging contractors and  original equipment manufacturers for  harvesting hard and softwood, salvaging  blow-down, clearing brush, topping,  felling, processing, grapple cutting, and  more.     

Endeavour also has in development  the Heli-Harvester, which will be used to  delimb and cut standing trees directly in  the forest. Once cut, the Heli-Harvester  transports the stems to the landing to be  processed by ground-based equipment or  transported by conventional means. 
Reader Service Card #149 

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, and have  a large accumulation capacity in multiple  tree gathering.                                

The heads 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 22”, 24” and 28”. 
Reader Service Card #150 

Loewen Forestry  Equipment 
Loewen Forestry Equipment offers a  two-gearbox 350-degree rotate mount.  It converts the existing saw head, is  simple to install (just unbolt the old and  bolt on the new) and there are no extra  hydraulics. With the high rotation wrist,  operators will experience more versatility  and productivity and do more than they  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 and resulting in higher  profits. 
Reader Service Card #151 

Madill Equipment Canada 
Madill produces two feller-buncher  sawheads for heavy-duty applications.  Both sawheads are designed for use on  Madill feller-bunchers, but are available  for individual sale. With Madill fellerbunchers,  the high-rotation and head tilt  capability allow for large bunches and  increased range of placement—increasing  overall productivity.                                 

Madill sawheads are high torque  (600,000+ in-lbs), high-rotation (360  degree) hot saws, with one pair of grab  arms and one pair of accumulating arms.  Each arm has a dedicated cylinder for  increased holding capacity, and grab arms  are hydraulically synchronized. Madill  sawheads are box-structure designed  for increased  strength, and  have large  covers for  easy access  to internal  hydraulics. The  MHS 24-7-  365 sawhead  weighs 8,000 lbs and has a cut radius of  24.7". The MTT 22-7-365 has a cut radius  of 22.7" and weighs in at 6,200 lbs. 
Reader Service Card #152 

Quadco has a variety of felling  options. The B-Series high speed saw  heads are best suited for large timber. The  patented “Arms Down” feature increases  leverage to easily handle tall timber. Two  cylinders per set of arms create greater  holding power for better tree alignment  and reduced butt friction. The C-Series  have the “Arms Up” style and are suited  for small to medium size, drive-to-tree  carriers in thinning. All those models are  available with a cutting capacity starting  from 20” and going up to 28”.                        

Quadco’s intermittent heads can  perform effectively in special applications  such as selective cutting, steep-slope  and shovel logging, by stopping and  retracting the ring saw. The four models  are relatively lighter than a hot saw. The  cutting capacity is available from 22” to  29”.  Quadco also offers  two shear models.  The 216 twin post  is ideal for drive-totree  bunchers. The  6 sq-ft side pocket  with a com-controlled  accumulator arm and  one-piece grab arm  make it well suited  for thinning. The 21”  centre post high-speed  shear with fast cutting cycles works best  with boom machines and trees of various  dimensions. 
Reader Service Card #153    

Click here to download a PDF of this file 

Click here to download the complete Harvesting/Felling Heads Spec Sheet