POLY-LONGER hedge and grass cutter

POLY-LONGER hedge and grass cutter description

Versatility to suit the task

For use up to 500 h/year, KUHN has developed the POLY-LONGER hedge and grass cutter models with a horizontal reach of 5 m and an available rotor circuit power of 51 hp.

Find a dealer near you

POLY-LONGERs are designed to offer versatility and are intended for individual or small-scale collective use.
Available in a straight arm configuration, thanks to its quality construction and high-performance components, it guarantees quality results for years to come.
The POLY-LONGER models can easily be operated for up to 500 hours per year.
Narrow paths

Your benefits

Electric proportional controls as standard

With the EP joystick, you will feel like a professional driver as soon as you step in the cab

4 electric proportional functions as standard!

The POLY-LONGER hedge and grass cutters are controlled via 4 electric proportional functions: pivot, main and outer booms and flail head orientation. The movement speed increases exponentially as the joystick is shifted further along one direction. The machine allows for smooth and precise operation, while providing unbeatable driving comfort.

For increased safety and precision, the proportional effect works in both directions: up and down. Precision is guaranteed regardless of the type of job (verge, bank, ditch, hedge, etc.).

For efficiency, the functions of the main boom, outer boom, flail head orientation, pivot and floating head can be activated simultaneously with the ergonomic joystick and the position of the various buttons. The EP joystick can also be adjusted to the size of your hand.

The EP joystick is easy to install even in the smallest cabs. It is connected to the machine by a single small-diameter electric cable.

T15 control console

The T15 control console can be removed from the main control panel to suit all cab layouts. It can be easily detached and positioned at eye level and/or within reach.

The console has many features:
  • Hour meter and oil temperature display,
  • Controls for lift float, automatic arm break-back and rotor (grass or wood direction) with anti-reversing safety,
  • Indicator lights, fan, float and temperature alert, floating flail head.
The console also includes troubleshooting and repair modes for machine maintenance.
T15 control console detachable from the main control panel

Versatility to suit the task


Difficult jobs are now a breeze!

When you invest in a 51 hp hedge and grass cutter with a reach of 5 m you basically need a machine that can go anywhere. The POLY-LONGER models have been designed with this in mind.

Whether you're working alone along a field, river or forest or performing roadside maintenance for professionals, the kinematics of the POLY-LONGER models make them highly versatile machines.

The many coupling solutions and easy cab installation make it faster to prepare the machine and uncouple it from the tractor.

The pivot for the slewing action, the vertical reach of up to 6.35 m, the parallelogram-mounted and accessories such as the SRS (Shift Rail System) are all high-tech advantages when it comes to landscape and roadside maintenance.

Pivot-mounted arm safety

When the arm encounters an obstacle, it automatically retracts to the rear. This prevents breakage due to deformation of the arm structure.

Maximum clearance

The cylinder of the outer boom is positioned above the arm so you can work over the top of fences or hedges without snagging. The parallelogram models can reach over even higher fences due to the anchor point of the arm on the rocker.
Maximum clearance

Narrow paths

The centred pivot of the POLY-LONGER models and their kinematics make it possible to work in narrow paths. You can work on the vertical plane as close as possible to the tractor without the arm extending to the opposite side.
Narrow paths

Head rotates 240°

The cutting head attachment is positioned at the rear of the head to ensure a wide range of motion even when the arm is extended to its maximum vertical or horizontal reach.
The best compromise between performance and cost with the KUHN POLY-LONGER 5557 PAL hedge and grass cutter


POLY-LONGER 5557 PAL with parallelogram kinematics: the automatic transmission of your KUHN Hedge and Grass Cutter!

POLY-LONGER 5557 PAL with parallelogram kinematics

The parallelogram: the automatic transmission of your hedge and grass cutter!

The main and outer booms of the POLY-LONGER 5557 PAL are linked by a mechanical connecting rod. A single movement on the joystick activates two arm movements. This operating assistance offers several advantages when it comes to driving the machine and controlling costs:
  • More flexible manoeuvring,
  • Less driving fatigue for the operator,
  • Faster obstacle clearance,
  • Lower maintenance costs by reducing friction (less ground pressure).




Technical characteristics
Horizontal reach (m)
Available rotor circuit power at 540 rpm (kW / hp)
Recommended use
Recommended minimum tractor weight (tonnes)
Minimum power required at tractor PTO (kW / hp)
Arm safety for obstacle clearance
Outer boom
Hitch category
Hitch type
Full enclosure to protect all components
Bumper with lighting and guards
Self-guiding system for the hoses between the frame and arm
Transport height (m) with 0.5 m ground clearance
Machine weight (kg)
5050 PAL
37 / 51
Up to 500 hours per year
59 / 80
Hydraulic pivot-mounted system with 116° slew
Straight arm
3-point cat. 2 and 3
A-frame + 2 stabilisers with universal joints
Frame and main boom with reconstituted very high yield steel structure
Main boom section 144 x 120 x 6 to 15 mm
Outer boom tubular section 100 x 100 x 8 mm
As standard
As standard
As standard
1 450
Oil tank capacity (l)
12 kW air-cooled radiator
Rotor circuit
Movement circuit
5050 PAL
As standard
Open circuit - Gear pump and motor - Aluminium casing
Delivery/pressure: 104 litres at 215 bar – Filter on suction
Open circuit – Gear pump – Aluminium casing
Delivery/pressure: 30 litres at 200 bar
VT 31 colour touch screen
Pivot, arm and head control
Two-directional rotor rotation (“grass” and “wood”)
Floating head
Hydropneumatic lift float
5050 PAL
As standard
4-function joystick with electric proportional control
Remote cable control (electric optional)
Electric control
Electric control
Flail head
Effective cutting width (m)
Rotor speed (rpm)
PRO sensor roller with removable ends (140 mm diameter)
5050 PAL
Double cog-type V-belt drive
2 870
180° mixed rotor (121 mm dia. x 10 mm thick tube)
for grass, bramble and wood Ø < 5 cm
24 T-flails
As standard
User comfort
Hour counter and temperature warning
5050 PAL
As standard