abrasion-resistant materials are used extensively to maximize durability .
The HFW232 High Capacity Bunching Saw boasts improved cutting performance and increased bunching capacity , which increase production and maximize revenue generation . It excels at cutting and handling high volumes of small stems , mixed stems , and large single stems up to 57.3 cm ( 22.6 in ) in diameter and with bunching capacity of 0.79 m ² ( 8.6 ft2 ). The same axis bunching finger and gather arm improve durability while the traditional pin and bushing configuration provides extended life and reduces owning costs .
The HFW232 has increased swell butt and low stump cutting capability plus design features to minimize width and improve symmetries for thinning applications , delivering the most versatile machine and saw combination on the market . Excellent visibility increases operator efficiency and ability to cut lower stumps .
Industry-leading Cat wear surfaces ( for saw disc housing entrance , discharge chute , skis , and other exposed areas ) provide the greatest wear resistance in highly abrasive conditions , extending intervals between replacements and reducing operating costs . All wear surfaces are simple and easy to replace .
Heavy duty rubber clamps secure the lift arm hoses at the rear of the head , eliminating bulkheads that may be susceptible to damage . The saw motor housing is enclosed in order to limit debris entry . Improved guarding , access points , and a centralized saw housing grease bank further reduce maintenance time and improve safety .
Caterpillar offers two reliable , productive versions of the HF201B felling attachment for its track feller bunchers
The HFW221 Felling Saw excels at cutting and handling large single stems up to 57.6 cm ( 22.7 in ). It also bunches medium and small stems , making it a versatile saw for thinning through final harvesting . The gather arms and tower work together to grip and tightly hold large single stems and small stem bunches for better control . A single cylinder and link control the left and right side gather arms and bunching fingers simultaneously , improving speed and holding power .
The HFW222 SC Side Cut Felling Saw is a highly versatile saw head specially designed for harvesting large timber . It features a single cut capacity of 56 cm ( 22 in ) in diameter along with small stem accumulation . For harvesting larger diameter trees , the HFW222 SC features the industry ’ s only side cut door , a unique solution for harvesting trees up to 76 cm ( 30 in ) in diameter from a single side on either flat or adverse terrain .
Caterpillar offers two reliable , productive versions of the HF201B felling attachment for its track feller bunchers . They are designed to fell and bunch a wide variety of tree species in almost any application , from plantation thinning to select cutting of large diameter wood . One option features a 40-degree partial lateral tilt while the other is offered with a 330-degree full lateral tilt for improved production .
A continuous spinning , highspeed saw disc maximizes inertia for excellent cutting performance and high production . All saw heads provide quick grab and accumulator arm speeds , and arms provide excellent bunching performance and tree control . Design maximizes visibility of the cutting area .
The attachments use a proven saw shaft and double tapered bearing design . A high pressure variable displacement motor enables strong saw performance and speed recovery , and the saw motor has a built in anticavitation valve to protect internal components and extend service life . Heavy-duty guards protect arm cylinders , hose and fittings , and saw motor from debris and damage , extending component life . The saw disc housing , tree support plate area , and lower skids use abrasion resistant plating in key high wear locations .
The HF201B saw head is the optimal felling attachment for the Cat 521B and Cat 522B zero tail swing track machines . The HF201B , with a single cut capacity of 572 mm ( 22.5 in ) in diameter , features a reinforced top yoke and frame , box section arm design , dual bearings , and robust saw base . It provides excellent accumulation capacity , wrist torque , and arm and wrist speeds . It accumulates neater bunches , improving operational efficiency .
Caterpillar customers are supported by the industry ’ s largest network of dealers who will keep them up and running with parts availability , field services , stateof-the art diagnostic programs , remote monitoring , and more . International Forest Industries | DECEMBER 2017 / JANUARY 2018 51