SPRING ACTIVE TRANSFER
|
|
|
|
|
| 3 section rolls with contour flexing chassis, centre pivoting wings and the unique SAT - 1000kg automatic weight transfer system. |
|
|
|
5 section rolls with SAT system independent flotation on all 5 sections thanks to the additional spring system built into the end section pivots and centre roll. |
|
Rolls without HE-VA Automatic weight balancing tend to exert the highest
ground pressure on the centre roller section. This roller section carries the
weight of the drawbar, wheel frame and hydraulics as well as its own
weight, far more than the two wing sections |
|
| |
1 With a basic roller set up there is no weight transfer and the uneven weight distribution is great as can be seen above. |
|
2 Even with a basic sprung weight transfer system the hinges at the end of the centre section roller negate much of the transfer effect. |
|
|
3 The HE-VA SAT system is fully spring loaded and has the outside roll section attached with centre pivot hinges, maximising the weight transfer to give even weight distribution across the full width of the rolls.
|
|
As the HE-VA wing sections are suspended from the central pivot the rolls can follow the most difficult contours. Deep hollows and undulations in the ground will often leave ordinary rollers hanging in mid air, achieving nothing.
HE-VA always give FULL width rolling power |
|
3 Section - 4.5m to 10.2m
|
 |
Rings are mounted on 60mm axles for strength and long life. these axles run on 4 bolts bearings protected inside u-profile steel.
Stone trays are fitted as standard and the rolls are all hydraulically operated from
the tractor seat using two double acting services.
There is a choice of six ring types along with three ‘boards’ which can be fitted in
front of the rolls for the additional cultivation action.
The folding mechanism has a deep wing link pivot with Teflon coated steel bushing top and bottom to provide strength for cultivation as well as rolling. |
|
5 Section - 10.2m to 12.2m
|
|
Although designed to cope easily with bigger farms, and larger hp based systems, the 5 sections rolls are still easy to handle - simple to fold and capable of devouring many acres of work in the day.
The rings are also mounted on 60mm axles with 4 bolt bearings.
The two outside wing sections are supported by deep wing link folding mechanisms with an additional jump slot for increased flotation and for working field edges.
The clever design of all HE-VA rolls also ensures that tractor drawbar height variation (400-600mm) does not alter the performance of the rolls.
5 section rolls design features independent flotation on each section. The centre pivot suspension gives full width contour following. Even the centre section floats independently. |
|
|
|
|
| |
| |
|
|
