Abstract: In each case at least one double disc coulter 7, 8 and one depth control wheel 9 areas arranged on the frame 6 of a pneumatic precision seed drill. Seen from the direction of travel, this depth control wheel 9 is located between the two disc coulters 7, 8, whereby the two disc coulters 7, 8 and the depth control wheel 9 rotate in the same direction.

Abstract: Viewed in the direction of travel, fertiliser coulters and swivel-mounted seed coulters 13 are arranged at coulter arms 40 on the frame 6 of a pneumatic precision seed drill. Between them there is a working device designed as a roller 15, which is designed for the re-compaction of the soil thrown up by the fertiliser coulter 12, the pre-compaction of soil between the working device 14 and seed coulter 13, and as a depth guidance roller for the precision seed drill.

Abstract: A pneumatic precision seed drill has a multiplicity of seeding hearts 1 for holding pivoting separating devices 3 exposed to a pressure difference between their inner space 21 and their exterior space 22. A multiplicity of holes 17-20 intended for the accumulation of seeds is arranged in the device 3. The separating device 3 is formed by a pair of separating plates 4, 5 connected to one another at their outer edge 38, 39 that are arranged offset in a tangential direction to one another to produce a spread seed row and are assigned to separate outlets 23, 24 for the discharge of the seed from the seeding heart 1 in the direction of the sowing coulter.

Abstract: A metering system is proposed for an agricultural distributor for dispensing granular or granulated material with which a vertical cell wheel arrangement in combination with an adjustable cell wheel floor achieves great variability of the adjustable metering volumes with reduced drive energy requirement.

Abstract: A double disc coulter 1 has two disc coulters 2 angled to each other to form a V shape that are rotatable on hollow axle stubs 3 by means of bearing units 18. One hollow axle stub 3 is arranged with a flange face 5 facing the coulter bar 4 at an angle to the vertical plane of the rotation axis of the hollow axle stubs. At the same time, the hollow axle stub 3 determines the angular position of the plane 13 that intersects in the rotation axis 6 and in an axis 7 vertical to the flange face 8, 9 of the coulter bar 4.

Abstract: The invention concerns a compact bearing unit 1 for a double disc coulter 2 with ball bearing 23 with an inner ring 3, outer ring 5 with flange facing and a protective cap 7, which contains a multi-stage sealing system, whereby a first seal 11 is provided between the inner ring 3 and an internal ring race 17 of the outer ring 5, and at least one additional seal 14 is arranged between the protective cap 7 and a ring race 13, 17 of the outer ring 5, whereby said seal does not make any additional installation space necessary in the axial direction of the bearing unit 1.