Pruning shears

Work objective

Pruning involves controlling the development of the vine in order to regulate fruit and wood production, as well as vigour. This work is generally carried out manually. Most pruning shears used today are electrically assisted.
The first electric pruning shears were developed by INFACO in the late 1980s. Since then, this equipment has continued to develop, offering ever greater power, comfort and lightness. |

Components of pruning shears

The cutting head

Made up of a blade and a counter-blade held in place by a bolt, it must be serviced every day to maintain good cutting quality while limiting mechanical stress. Some cutting heads are fitted with grease nipples to make greasing easier.

Arvipo has developed an atypical cutting head equipped with radial and axial ball bearings. Daily maintenance is as simple as sharpening the blade.

Pellenc uses a surface treatment that makes lubrication of its EVOLUTION II cutting head a weekly requirement.

Most manufacturers use a rack-and-pinion system to drive the blade. Pellenc, ARS and Felco use a ball screw and nut system.

Components

of electric pruning shears

The

blade holder

The

blade

Electric

pruning shears spare parts for maintenance

Maintenance

spare parts for electric pruning shears

Photo

of a Pellenc Lixion pruning shear

The motor

This is generally a conventional DC motor. Pellenc uses "brushless" motors, i.e. motors containing no rotating commutator and therefore no brushes (carbon brushes). This technology eliminates the disadvantages of conventional DC motors by avoiding all mechanical and electrical losses associated with brushes.

The battery

several technologies are available

Nickel-Metal Hydride (NiMH) from Infaco, and Arvipo (ps 60)
Lithium-ion (Li-ion) at Automax, ARS, Pellenc and Zanon
Lithium-polymer (Li-po) at Felco Manufacturers

are offering batteries that are increasingly compact and lightweight (˜0.8 kg for Felco), with ever greater autonomy .
The accumulator and electronic box are integrated into a waistcoat. Felco offers the option of fitting the waistcoat with a second battery to extend its range.

Photos of different brands of back battery for electric pruning shears

The

control box Electric

pruning shears are generally fitted with a control box for controlling various functions. This box can be remote and fitted with an LCD display. For the simplest models, it displays the battery charge status. Felco and Infaco offer a wide range of information and settings that can be accessed from the box.

Control

box for electric pruning shears

Adjusting and using the pruning shears

Different types of electric pruning shears are available on the market: simple pruning shears with no special features and more complex pruning shears with a wide range of functions and information.

Some models have a remote control unit (independent of the battery) which can be used to carry out all the available settings, as well as providing a large amount of information (battery charge status, cutting statistics, percentage of blocked cuts, etc.).

The majority of pruning shears have a cutting head opening control , i.e. an intermediate opening (½ opening mode) which is used when cutting small diameters (cleaning the aste). Some manufacturers go even further, offering the option of impulse or progressive operation.

finally, Infaco, Felco and Pellenc offer the option of modifying the crossing of the blade and counter-blade, which increases blade life.

Photosof different brands of electric pruning shears (Infaco, Pellenc, etc.)

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