HE-VA Disc Roller Disc Harrow

Disc Roller - Introduction

Unfold it, put the tractor in gear and instantly take the cultivation workload down in size!

The HE-VA Disc Roller Disc Harrow has the key ingredient of any effective cultivation machine - it works - it is simple and most importantly it saves time and money.

The HE-VA Disc Roller Disc Harrow is a result of years of development and testing to find the ideal combination of disc angle and packer ring to give perfect incorporation, mixing and consolidation in one high-speed pass.

- Introduction

The HE-VA Disc Roller Disc Harrow is a high-speed, high output machine for farms with many hectares of work to cover in a short space of time.

The Disc Roller Disc Harrow is compact and manoeuvrable around the field and on the road, and is simple to operate. It is highly versatile, it can be used to incorporate stubble and other crop residues to a depth of up to 125mm (5") in minimal tillage cultivations. It is also a superb tool for working ploughed land prior to drilling. With around 1 tonne per metre you have an effective slicing action combined with a very efficient consolidating press for secondary cultivations.

DSD - Depth Synchronised Disc - Aggressiveness - Features

The unique DSD technology is in the way that the aggressiveness of the discs change with the working depth. When the operator needs the machine to work deeper, the tractor hydraulics are used to alter the working depth of the discs. This is
beneficial in two ways, it transfers more weight to the discs but more importantly changes the angle of the disc in its approach to the work producing a more aggressive action which effectively pulls the discs into the soil.

The work is carried out by two rows of off-set scalloped discs mounted on a sealed twin taper roller bearing hub assembly. These discs are set at +18o/-18o to the direction of travel. This configuration aggressively cuts all the soil in one pass, mixing and chopping crop residues thoroughly.

The DSD System is shown in our Disc Roller Disc Harrow video.

510mm Sabre Disc - Features

A major part of the development work on the Disc Roller Disc Harrow was the optimisation of the disc design. This has resulted in the new Sabre disc (see left) from HE-VA. Normal heavily dished discs (see left) have too much angle and do not overlap enough to cut all the soil at shallow depths.

The new shallow disc angle, with its superb cutting action, coupled with the stagger of the two disc rows provides the maximum movement and mixing of soil, even at shallow working depths. The other advantage of a relatively flat disc is that it does not smear causing a disc pan in wet conditions, the back of a more conventional concave disc smears the soil as it works creating a pan and causing problems for crop roots and drainage.

Adjustment & Control - Features

When turning on the headland the operator lifts the discs out of work and puts them back into work on the hydraulics.

The simple depth gauge on the 3, 3.5, 4, 5m machines can be clearly seen from the tractor seat and allows the operator to set the working depth of the machine hydraulically from the cab.

On 6.3 and 8.0m machines the Electro Hydraulic Depth Stop senses when the preset depth has been reached. A simple activation of the spool in the tractor seat takes the discs out of work and back to exactly the same depth.

There is also an override switch incorporated into this depth stop so that the operator can switch the depth control off and put the discs in deeper where conditions require. Electro Hydraulic Depth Stop is an option on 3, 3.5, 4, 5m machines.

V-Profile Roller - Features

Like many of the machines in the HE-VA range the Disc Roller Disc Harrow uses the pressed steel V profile ring. However, all the rings are mounted on a 300mm tube so that each section of the roller turns as one ensuring the machine can continue to work in very wet sticky conditions.

Each ring section is castellated ensuring the roller turns in light soils and the aggressive rib and shoulder profile combines with the 125mm spacing to leave an excellent consolidated weatherproof finish.

Border Deflector - Features

The border deflector comes standard on every Disc Roller Disc Harrow ensuring that a level finish can be achieved on any soil type.

Drawbar Height Adjustment - Features

Drawbar height is hydraulically adjustable to suit tractor hitch Trailed 3m, 3.5m, 4m and 5m machines. On the 6.3m and 8m machines the drawbar height is hydraulically adjusted to suit tractor hitch with 9 positions.

Models - Rigid 2.5m / 3m / 4m

The 2.5m, 3m, 3.5m and 4m Disc Rollers are available as rigid models with the option of either mounted or trailed on all machines with the exception of the 2.5m model.

Models - 2 Section Folding 4m / 5m

A real advantage of the Disc Roller Disc Harrow design is the simplicity of folding. From driving to the field to being in work literally
can be measured in seconds. Once in work all the adjustments needed can be done from the tractor seat.

Models - 3 Section Folding 6.3m / 8m

The same advantages are intergrated into the larger 3 section folding machines. The same as the 2 section machines, getting the Disc Roller Disc Harrow into work from transport is done in seconds, all adjustments can be done from the tractor seat and then put straight into work.

HE-VA Trailed Disc Roller Disc Harrow - Technical

HE-VA Mounted Disc Roller Disc Harrow - Technical

Disc Roller Disc Harrow Shattaboard

The Disc Roller Disc Harrow is an excellent primary cultivator for cultivating stubbles and incorporating crop residues, add a
Shattaboard and you have a superb machine for secondary cultivation as well, a true multi-purpose cultivator that
can be used on min-till or ploughed land to produce a level, firm seedbed.

Level, cultivate and consolidate - Shattaboards carry soil along in work levelling off hills and filling in holes,
however just as importantly they also consolidate using the weight of the press behind them. This means that the soil presented to the discs is firm and enables them to do a better job of cutting and slicing clods before the V profile Roller consolidates. Hence, whilst the Disc Roller Disc Harrow will do a good job on its own as a secondary cultivator the addition of a Shattaboard enhances the result. The Shattaboard angle can be adjusted from the tractor seat in work to suit the job in hand and the Shattaboard can, just as easily, be retracted from work to allow the operator to use the Disc Roller Disc Harrow on its own.

Even and firm

The Shattaboard can work individually but the levelling effect is increased with the addition of the optional locking bars to convert the individual springs into a complete "board" for full width action.

The optional Shattaboard edge plates can be fitted to help keep certain soil types from ridging either side of the press.

Slicing plates

On heavier soil types slicing plates can be fitted in lieu of the standard flat plates to slice and fissure the clods better.

Disc Roller Disc Harrow Shattaboard

Disc Roller Disc Harrow Variocast Seeder Mounting Kits