Dymax HPX21 excavator tree shear attachment (21-inch capacity) for 25–36 ton excavators

HPX21 Dymax Excavator Tree Shear

FOR 25T-36T LARGE HYDRAULIC EXCAVATORS — 21″ CUT CAPACITY. IT’S THE BIGGEST FELLER OF THEM ALL.

The Dymax HPX21 is a powerful tree shear attachment for large excavators that is used for taking down the biggest and toughest trees on the planet. The Dymax HPX21 excavator tree shear delivers up to 100 tons of shearing force and cuts trees like a hot knife through butter. With a maximum cut capacity of 21 inches (53cm) the HPX21 can easily cut trees of all types including hardwoods. Like most Dymax Excavator Tree Shears the HPX21 features continuous blade and arm support during the cut to increase durability and performance.

“We’ve had Dymax tree shears for more than 15 years. It’s a fine piece of equipment. Durability. Labor saving. Brings safety to our operation.”

– J.D. King, County Engineer

APPLICATIONS

Tree harvesting for pulp and paper applications
Biomass harvesting
General land clearing and site cleanup
Roadside and transmission utility line right-of-way clearing
Railway right of way clearing
Hazardous fuels reduction on forested lands
Plantation thinning and harvesting for Eucalyptus and Acacia

FEATURES AND BENEFITS

Cut up to 21-inch diameter hardwoods
Continuous blade support during the cutting process
Strong and durable grapples enable operators to place sheared trees into collection piles
High-strength steel cutting arms with bolt-on replaceable 1.25in (32mm) thick cutting knives
Bolted head plate for changing machine connections
Heavy duty chrome plated shear arm pivot pin with replaceable bushings and seals
100 tons of shearing force

OPTIONS AVAILABLE

60°, 97° or 180° rotation solutions make it possible to adjust to the tree during cutting and assists operators manipulating logs on the ground, placing them into collection piles.
Electro-hydraulic valve with an electrical switch kit for rotation is priced separately. If you only have (1) circuit, please visit with your Dymax sales representative.
Spring-loaded bunch & gathering arm for multi-stem clearing applications (DX-TS-FB models only)

SPECIFICATIONS

HPX21 MODELS WITHOUT ROTATION

Model Code
Description
Weight (lbs)

DX-TS-FG-HPX21-HX-25T

Tree Shear-Grapple-HPX Series 21 inch capacity-Hydraulic Excavator-25 Ton

STANDARD FEATURES:

– 21 inch max capacity diameter (51cm)

– HPX frame group

– 1.25 inch AR400 cutting knives

– 6.0×16 cylinders

– Twin shear arms with dual grapples

– Chrome-plated pivot pins and bushings

– Bolt 303 excavator head plate with adapter and pins

OPTIONS:

Contact Dymax for options and pricing information

– Grapple load check circuit

– Rotator systems if not quoted

– Custom design solutions

– 1.25 in thick cutting knives upgrade

WEIGHT: 6280 lbs

DX-TS-FG-HPX21-HX-30T

Tree Shear-Grapple-HPX Series 21 inch capacity-Hydraulic Excavator-30 Ton

STANDARD FEATURES:

– 21 inch max capacity diameter (51cm)

– HPX frame group

– 1.00 inch AR400 cutting knives

– 6.0×16 cylinders

– Twin shear arms with dual grapples

– Chrome-plated pivot pins and bushings

– Bolt 303 excavator head plate with adapter and pins

OPTIONS:

– Grapple load check circuit

– Rotator systems if not quoted

– Custom design solutions

– 1.25 in thick cutting knives upgrade

WEIGHT: 6320 lbs

DX-TS-FG-HPX21-HX-36T

Tree Shear-Grapple-HPX Series 21 inch capacity-Hydraulic Excavator-36 Ton

STANDARD FEATURES:

– 21 inch max capacity diameter (51cm)

– HPX frame group

– 1.25 inch AR400 cutting knives

– 6.0×16 cylinders

– Twin shear arms with dual grapples

– Chrome-plated pivot pins and bushings

– Bolt 303 excavator head plate with adapter and pins

WEIGHT: 6420 lbs

Design and specifications are subject to change without notice.

HPX21 MODELS WITH 60° ROTATION

Model Code
Description
Weight (lbs)

DX-TS-FGT-HPX21x60-HX-25T

Tree Shear-Grapple + Tilt-HPX Series 21 inch capacity x 60 degrees-Hydraulic Excavator-25 Ton

STANDARD FEATURES:

– 21 inch max capacity diameter (51cm)

– HPX frame group

– 60 degree rotator; cylinder driven with slew ring

– 1.0 inch AR400 cutting knives

– 6.0×16 cylinders

– Twin shear arms with dual grapples

– Chrome-plated pivot pins and bushings

– Bolted excavator head plate with adapter and pins

OPTIONS:

– Grapple load check circuit

– Electro-hydraulic diverter valve kit for rotation systems operation

– Rotator systems if not quote

– 1.25 inch knife thickness upgrade

– Custom design solutions

WEIGHT: 6850 lbs

Design and specifications are subject to change without notice.

HPX21 MODELS WITH 97° ROTATION

Model Code
Description
Weight (lbs)

DX-TS-FGT-HPX21x97-HX-30T

Tree Shear-Grapple + Tilt-HPX Series 21 inch cut capacity x 97 degrees total rotation-Hydraulic Excavator-30 Ton

STANDARD FEATURES:

– 21 inch max capacity diameter (51cm)

– HPX frame group

– 97 degree rotator; twin cylinder driven with slew ring

– Rotates left and right 48.5 degrees

– 1.25 inch AR400 cutting knives DY50705

– 6.0×16 cylinders

– Twin shear arms with dual grapples

– Chrome-plated pivot pins and bushings

– Bolted excavator head plate with adapter and pins

OPTIONS:

– Electrohydraulic directional valve (DY25420)

– Universal Wiring Kit (DY164487)

WEIGHT: 7450 lbs

DX-TS-FGT-HPX21x97-HX-36T

Tree Shear-Grapple + Tilt-HPX Series 21 inch cut capacity x 97 degrees total rotation-Hydraulic Excavator-36 Ton

STANDARD FEATURES:

– 21 inch max capacity diameter (51cm)

– HPX frame group

– 97 degree rotator; twin cylinder driven with slew ring

– Rotates left and right 48.5 degrees

– 1.25 inch AR400 cutting knives DY50705

– 6.0×16 cylinders

– Twin shear arms with dual grapples

– Chrome-plated pivot pins and bushings

– Bolted excavator head plate with adapter and pins

WEIGHT: 7450 lbs

Design and specifications are subject to change without notice.

HPX21 MODELS WITH 180° ROTATION

Model Code
Description
Weight (lbs)

DX-TS-FGT-HPX21x180-HX-30T

Tree Shear-Grapple + Tilt-HPX Series 21 inch capacity x 180 degrees-Hydraulic Excavator-30 Ton

STANDARD FEATURES:

– 21 inch max capacity diameter (51cm)

– HPX frame group

– 180 degree rotator systems

– 1.0 inch AR400 cutting knives

– 6.0×16 cylinders

– Twin shear arms with dual grapples

– Chrome-plated pivot pins and bushings

– Bolted excavator head plate with adapter and pins

OPTIONS:

– Grapple load check circuit

– Electro-hydraulic diverter valve kit for rotation systems operation

– Rotator systems if not quoted

– Custom design solutions

WEIGHT: 6966 lbs

Design and specifications are subject to change without notice.

HYDRAULIC REQUIREMENTS

MODELS: DX-TS-FG-HPX21-HX-25T, DX-TS-FG-HPX21-HX-30T, DX-TS-FG-HPX21-HX-36T

HYDRAULIC REQUIREMENTS: Your Machine will require a standard auxiliary for operation.

CIRCUIT 1 – Shear/Grapple

– Type Two Way

– GPM (min/max) 20-30, PSI (max) 4,000

NOT SUPPLIED: Not provided with lines to the machine auxiliaries.

MODELS: DX-TS-FGT-HPX21x60-HX-25T, DX-TS-FGT-HPX21x180-HX-30T

HYDRAULIC REQUIREMENTS: Your machine will require the following 2x circuits for operation. If your machine has only 1 auxiliary circuit, please contact Dymax for pricing on electrohydraulic directional valves to power the rotate circuit.

CIRCUIT1 – Shear/Grapple,

– Type Two Way

– GPM (min/max) 30-40, PSI (max) 4,000

CIRCUIT2 – Rotator, Gear Drive 180

– Type Two Way + Drain Line Required

– GPM (min/max) 8-10, PSI (max) 3,000

NOT SUPPLIED: Not provided with jumper hose lines.

MODELS: DX-TS-FGT-HPX21x97-HX-30T, DX-TS-FGT-HPX21x97-HX-36T

CIRCUIT1 – Shear/Grapple

– Type Two Way

– GPM (min/max) 30-40, PSI (max) 4,000

CIRCUIT2 – Rotator, Cylinder Drive 60

– Type Two Way

– GPM (min/max) 8-10, PSI (max) 3,000

NOT SUPPLIED: Not provided with jumper hose lines.

FAQ’S

What size excavator is this tree shear designed for?

The HPX21 is designed for 25–36 ton large hydraulic excavators.

What is the maximum cutting diameter?

Up to 21 inches (53 cm).

Does it hold the tree after the cut?

Yes. Each HPX shear uses grapples to maintain control of the tree so the operator can place it safely. The HPX21 has a dual grapple configuration. (Twin shear arms with dual grapples.)

What hydraulic flow and pressure are required?

It depends on the model and whether you have rotation. Generally, the standard range for HPX21 is 20-30 GPM @ 4,000 PSI. Rotation configs can require 30-40 GPM and a second circuit. 180° gear drive requires a drain line.