Detail A
Detail B
Detail C
ROLLER VARIANTS AND STRAW HARROW
Cage roller EWK
Double cage roller ZWK
Ring roller RKW
Straw harrow NLS
The straw harrow is used to level fine, crumbly soil and to lift rooted plant
residues to the surface of the soil.
Make sure there is enough clearance between the harrow tines and the
wheels on machines with chassis, the wheels can cause damage if the
setting is unfavorable.
The contact pressure of the harrow is regulated with the hole group
(detail B). If there is a lot of organic mass, it may be necessary to remove
the bolt, so that the harrow can freely deflect upwards.
The angle of inclination and thus the intensity of the harrow can be re-
gulated with the hole group (detail A). If there is a lot of organic mass,
the harrow should be set as open as possible (so that the organic mass is
not retained) otherwise the harrow can tend to clog. The function of the
harrow can be deactivated if the harrow is turned backwards and the
bolt (detail A) is then inserted in front of the connecting arm (Not pos-
sible with some model variants due to collision with other components).
The single roller is designed as a combi-mix roller (flat bar / cage bar
mixed). The diameter is 400 mm. The combination of cage and flat bars
results in an ideal combination of reconsolidation and fine crumbling
effect. The self-cleaning effect of the flat bars is particularly helpful in
damp conditions and offers significant advantages compared to pure
tube bar rollers.
The numerous partition walls give the roller the necessary stability and, in
combination with the large-sized flange bearings, ensure a long service
life.
The front roller has a diameter of 400 mm, the rear roller has a diameter
of 350 mm. Due to the smaller diameter of the rear roller, it achieves a
higher rotational speed than the front roller. The material thrown up by
the front roller is thus very finely crumbled by the rear roller.
As standard, the front roller is a combi-mix (flat bar / cage bar mixed)
version and the rear roller is a pure cage bar version. If desired, the rear
roller can be designed as a pure flat bar version, but this is only recom
-
mended for floors that are not rich in stones.
The ring roller ø600 mm in combination with the spring-loaded
knife-harrow ensures intensive crumbling and optimal reconsolidation.
The knife-harrow is adjusted in its high by using the spindle Detail C. If
the spindle is turned clockwise, the knives work deeper. If the spindle
is turned counterclockwise, the knives work higher. If there is a lot of
organic matter, the pre-harrow can tend to clog, the knives should then
be set higher or raised up completely. Make sure that the same height
is adjusted on both sides, this can be checked by measuring the length
of the spindle on both sides. The knife-harrow is spring-suspended and
thus secured against overload.
A scraper rail is mounted on the ring roller which prevents the roller from
becoming blocked.
Avoid cornering on all types of rollers as the bearings can be damaged
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