Single Disc Opener With paralelogram

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Single Pivot Point Link

When the seeding train encounters variations in topography or differences in the volume of fallow on the ground, it causes the entire mechanism to oscillate around a pivot point, moving up and down. These movements constantly alter the point at which the seeds are deposited as well as the cutting angle of the disc, which affects the efficiency with which it cuts through residues and its penetration ability into the soil.

Seeding Blade

18" x 6 mm, boron steel disc - 75 Rw C, inclination 7º


firming Plastic Tail, ideal for clay soils

Control de profundidad

Sencillo control de profundidad con leva

Discharge Pipes

Independent downspouts for seeds and fertilizer

Groove Closing

Double or single toothed wheel made of boron steel.
Single disk row unit with parallelogram, for no-till farming
Single disk row unit with parallelogram, for no-till farming

Our project in Ukraine

Watch full video in YouTube in russian.

Upgrade Your Planter For No-Till Farming

The THEYCO 2023 is the latest and most advanced row-unit to sow and fertilize, all at once, especially in uneven, clayey, and/or sticky soils.

The adjustment functions allow you to calibrate each of the units exactly the same depth.

Download Technical Data Sheet 

The opener is attached to the frame by means of a parallelogram that allows to the shoe remain perpendicular to the ground at all times, therefore, always works with the same attack angle, keeping the relative depths between the seeds and the fertilizer constant regardless of the soil is not even.

The set of the 17 3/4″ disc and the shoe, allow for cutting the stubble and opening a uniform groove for the grains and the fertilizer.


This opener has exceeded all our expectations and will surely exceed yours as well.


100% maintenance free

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Gauge Wheel Cleaning System​

In the photograph, you can clearly see the problems caused by the conjunction of stubble and sticky soils with high humidity.

To solve this problem, initially, the gauge wheel had a conical boron steel extension on its inner face, which acted as a scraper on the surface of the sowing disc, removing stubble and mud.

Монодисковый сошник - Уретановое колесо

The new wheel model reproduces the same profile of the gauge wheel with the conical rim with the boron steel conical rim but made entirely of urethane, achieving the same effect but tripling the useful life of the assembly.

Llanta con rayos

To avoid the gauge wheel blocking, an open 3-spoke rim has been placed that allows the exit of stubble and mud that could be introduced between the disc and the wheel. 

The hub now has a MAINTENANCE-FREE KRRS double-shielded double-row ball bearing.

Shoe And Discharge Tubes

Planting shoe with a single discharge tube
Planting shoe with two discharge tubes
The tungsten contribution is made by a robot specialised for this task.

The THEYCO 2023 row-unit allows for two possible configurations, seeds only or seeds, and fertilizer. This alternative is optional, at the client request.

Plastic seed firmer

Lengüeta plástica

Plastic seed firmer: It has an adjustable plastic spring and two fastening screws that are screwed directly to the shoe.

Reduce maintenance time and costs.

Cuerpo de siembra monodisco. Detalle del desgaste de l punto de pivot del brazo principal.

The play of the shoe is increased with the passage of the hectares worked, varying the depth where the seeds are placed, affecting the emergence.

Cuerpo de siembra monodisco. Sistema de bloqueo del perno de la zapata

The new locking system of the shoe bolt prevents it from moving, thus avoiding the wear of the pivot point on the main arm.

General Dimensions

Monodisc with parallelogram

For direct seeding, the pressure must be no less than 175 kg.

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Single disk row unit with parallelogram, for no-till farming

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Single disc opener for no-till farming - photo

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