Coulters | Harrows


Parallelogram suspension of the chisel openers

All the chisel openers are suspended on parallelogram linkages. Of course this is relatively complex but ensures, in varying or changing (uphill – downhill, on the headland, under different soil consolidations, etc.) forward speeds, and in addition any soil undulations, that the desired sowing depth is being maintained. 

The highest field emergence – it all depends on the coulter

  • Uniform depth placement 
  • Optimum furrow clearance 
  • Highest forward speeds 
  • Maximum operational reliability
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Coulter arrangement

The coulters are arranged in four rows with a tine spacing of 18.75 cm or in three rows with a tine spacing of 25 cm and in such a way that continuous open “tunnels” of approx. 75 cm are provided between them. This principle allows a relatively narrow coulter spacing (18.75 cm or 25 cm) for quick blanket coverage of the crop (a full canopy) and yet reduces the danger of blockage by any large volumes of straw at the same time.

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Die Scharspitze (1)

The point

The point or “chisel” is protected against wear by a hard metal plate (tungsten carbide cobalt plate) at the front - this means that this point has an especially long life. This is yet another AMAZONE invention which is often “imitated”. It is easily recognisable: The AMAZONE chisel opener is the result of years of experience and is simply very good.

A coulter chisel opener set with 2 hard-faced plates for a longer service life, e.g. for sandy soils, is available as an option.

AMAZONE also offers a chisel opener set for band sowing across a width of approx. 55 mm for conventional and mulch sowing. This set allows a wider distribution e.g. for increased tillering.

The duckfoot chisel opener set, in widths of 150 mm or 200 mm, is ideal for the band sowing at a shallow placement of, for example, fibre flax. With a coulter spacing of 18.75 cm, the 150 mm wide duckfoot coulter achieves almost full-surface weed control, whereas the 200 mm wide duckfoot coulter achieves complete mechanical weed control like a shallow cultivator. In this respect, the pulling power required for the narrow duckfoot coulter is less than for the 200 mm wide duckfoot coulter.

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Hoop ring rollers on every coulter

AMAZONE moved a huge step forward with the so-called hoop ring rollers on each coulter to the left and right of the seed furrow. These provide individual and reliable control of the depth of each coulter. In addition, the seed furrow is uniformly closed with loose and finely crumbled soil, even in very wet soils or wet patches. And all this even at forward speeds of up to 18 km/h. 

That means: no matter how much soil is thrown to the side by the chisel opener, the two round discs deflect most of it back over the seed furrow. The angular adjustment of the discs adds a slight pressure from both sides. What the rollers do not manage to bring back in is finished off by the Exact harrow. This also ensures a level field. The Roller harrow brings up the rear and can consolidate the loose soil above the seed furrow if necessary. 

  • Good seed/soil contact as a result of the chisel opener clearing the seed furrow. 
  • A large amount of fine-crumbed soil in the seed furrow which leads to quick warming of the soil in the seed area. 
  • Perfect germination conditions 

The hoop ring consists of Reflex discs and the hoops as supporting elements. The hoops fitted to the outer side of the reflex discs are made of thin material and guide both the chisel opener and the Reflex discs at the desired depth at all times – irrespective of the forward speed! Due to their especially narrow shape no bulldozing is created, even in moist soil – so that the machine can be still be utilised even when the soil is still very wet. And all this without scrapers, which, as everyone knows, tend to carry along a mixture of straw and soil, resulting in a significant braking effect and the relevant wear. 

The sowing depth is easily adjusted in groups via crank handles mounted centrally on each coulter module – very simple and quick.

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Roller for stony ground

AMAZONE offers a roller for stony ground with maintenance-free bearings and lifetime lubrication as an alternative to the hoop ring roller. This is extremely resistant to stone trapping.

A robust semi-pneumatic wheel can also be used as an option for many operational conditions. This creates a profile for collecting water in very dry conditions. It stands out because of its excellent self-cleaning effect when used on wet soils. It is also insensitive to stones and has a low tendency to clog. Since a harrow can be dispensed with when using the semi-pneumatic wheel, it is a low-cost alternative to the hoop ring, or stony ground, roller with a following harrow.

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REVOMAT overload safety device

If the chisel opener hits an obstacle, e.g. heavy stones or compacted headlands, the upper link abruptly gives way at an exactly pre-set pressure. The coulter jumps upwards and immediately returns into the work position. Automatically, super! With obstacles that are just hit on the angle in the direction of travel, the coulter just moves to the side – because the entire lower link is not rigid but a one-piece long spring plate. Also again automatic, super.

  1. Top link straight chisel opener in operational position
  2. Top link cranked chisel opener “deflected” after hitting an obstacle in the soil
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An even field is left

After the pass, the Primera DMC openers leave an even finish (no grooves or ridges), resulting in, apart from an even field emergence, also practical driving advantages – e.g. for a smooth ride of the combine, the crop protection sprayer (no boom bounce!) and the fertiliser spreader. This applies in particular also to both field ends of the headland.

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Seed coverage with the Exact harrow

The Exact harrow levels the soil surface, working blockage-free, even where there are large quantities of straw. The individually-pivoting, harrow elements follow the ground contours, creating a uniform seed covering, straw-free, even in areas where copious amounts of straw prevail.

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Additional consolidation with the Roller exact harrow

The press rollers on the Roller harrow additionally consolidate the ground directly above the seed furrow. This is recommended especially for light, dry soils when sowing spring crops or rape. The AMAZONE Roller bar can be quickly raised out of work and locked.

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Druckrollen bei feuchten (klebrigen) Bodenverhältnissen (1) Arbeitsablauf_Saat_DMC-Striegel_002_d1_190109

Press roller in damp, sticky conditions

Attention: in moist & sticky soil conditions, practitioners recommend for today’s seed drills that use pressure or guide rollers, to isolate these rollers, to dismount them or to lock them in raised condition (out of work). This is only possible, however, if it is not also providing the depth control. The crucial disadvantage of other systems. This is the crucial disadvantage of other systems, but with AMAZONE this problem is well solved!

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Scharspitze mit einer Hartmetallplatte

Point with one hard metal plate

Direct sowing: Yes
Pulling power requirement: Very low
Sowing width: 1.5 cm
Effective width: 1.5 – 3.5 cm

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Scharspitze mit zwei Hartmetallplatten

Point with two hard metal plates

Direct sowing: Yes
Pulling power requirement: Low
Sowing width: 1.5 cm
Effective width: 1.5 – 3.5 cm

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Scharspitze für die Bandsaat

Point for band sowing

Direct sowing: To a limited extent
Pulling power requirement: Low
Sowing width: 5.5 cm
Effective width: 5.5 cm

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Gänsefußmeißel mit einer Hartmetallplatte 150 mm breit

Duckfoot chisel with one hard metal plate 150 mm wide

Direct sowing: No
Pulling power requirement: Medium
Sowing width: 10 cm
Effective width: 15 cm/almost full-surface

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Gänsefußmeißel mit einer Hartmetallplatte 200 mm breit

Duckfoot chisel with one hard metal plate 200 mm wide

Direct sowing: No
Pulling power requirement: High
Sowing width: 10 cm
Effective width: 20 cm/full-surface

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