A universal machine for pre-sowing and stubble cultivation

The U 652 disc harrow is a stubble harrow that performs post-harvest work efficiently. Equipped with high-quality discs and shock absorbers that meet stringent operating standards, the machine's wide gap between the discs and vibration-absorbing shock absorbers ensures optimal processing of crop residues without blockages. It excels not only in stubble work but also in soil preparation before sowing.





Two variants of the overload shock absorber

The U 652 machine is an addition to Rolmako's extensive range of disc harrows, positioned between the U 693 and U 671 models. Featuring a disc spacing of 90 cm, it is equipped with OFAS 560 mm discs, maintenance-free hubs, automatic transport locking, and hydraulic depth adjustment. The machine's working elements are protected against excessive overload by LongLife 40 mm rubber elements or, optionally, 3D shock absorbers with a 35 mm x 35 mm worm spring.













Additional cultivation tools that ensure the highest quality of cultivation

Rolmako U 652 can be equipped with tools for fast and high-quality cultivation. The machine can include a finger comb beam between the discs to prevent stubble blockages and a rear spring comb beam to spread poorly dispersed straw over the entire crop width. It can also be equipped with front cultivation tools, a choice of Crossboard drag in various versions, or a knife roller, depending on the desired cultivation effect.

Machine construction



1. Rear LED lighting beam

Optionally, the LED lighting beam can be equipped with a license plate frame with illumination for machines that will be registered at the transport office.

2. Drawbar hitch

Due to the incorporation of washers and bushings crafted from highly durable materials, the drawbar eliminates the need for lubrication. It features replaceable hardened hitch tips. Optional coupling forms include a drawbar eye or a K80 ball hitch.

3. Massive drawbar

Drawbar with a swinging beam of Category III tractor hitch. Both mechanically and hydraulically adjustable, the drawbar provides high stability during cultivation work and field travel.

4. Transport trolley

The transport trolley positioned in front of the tillage roller optimizes weight distribution on the machine, enabling efficient and smooth field operation and ensuring enhanced stability of the disc harrow during road transport.

5. Two brake options

Agricultural machines and their combinations exceeding a total weight of 3500 kg must be equipped with pneumatic or hydraulic brakes for movement on public roads. Machines surpassing this weight that are not equipped with such brakes are prohibited from traveling on public roads.

6. Supporting wheels

For large machines, the manufacturer recommends equipping them with optional support wheels to better maintain the working depth and relieve the load on the tractor's hydraulic lift system.

7. Knife roller

The roller delivers superior cutting performance at high rotational speeds. Hydraulic regulation of pressure is controlled from the tractor cabin. Crop residues are more effectively incorporated into the soil, expediting decomposition.

8. Working elements

Standard harrow disc with aggressive tine 560 mm, manufactured by OFAS. Basic thickness 4 mm, with options for 5 mm and 6 mm. Additional disc shapes available: smooth, fine-tooth, ALFA disc.

9. Bearing of working discs

Fully integrated disc bearing system, permanently lubricated and sealed.

10. Long Life rubber shock absorbers

Rubber spring elements allow the optimal adjustment of the concave discs to the contours of the cultivated soil. This ensures the safety of the disc harrow frame and absolute maintenance-free overload protection while maintaining the preset working depth.

11. Side leveling covers

The use of side levelling covers retains the cut and mixed straw within the unit, preventing the formation of mounds and ruts during subsequent passes.

12. Tillage roller

To cultivate the soil effectively, selecting the appropriate tillage roller is essential. The choice depends on the soil type and the desired outcome. Each roller variant is designed for specific working conditions.

13. Adjusting the working depth

The hydraulic adjustment of working depth, facilitated by spacer clips on the cylinders, is designed to be easy and operator-friendly.

14. Automatic arm lock

The transport lock is automatically engaged by a spring-loaded latch, which is released by a single-acting hydraulic cylinder.

15. Adjustment of the row of disc

The system enables the easy adjustment of the front row of discs relative to the rear working section. This solution offers the advantage of correcting the position of the discs as they wear out.







Equipment
standard
  • OFAS toothed disc with a diameter of 560 mm, rubber shock absorber LongLife 40mm x 180mm, maintenance-free AgriHub hubs, spacing between the rows of discs 90 cm, hydraulic adjustment of the working depth, pipe roller Ø 500 mm. The U 652 disc harrow with a width of 5.0 m and 6.0 m is equipped witha pneumatic brake as standard. On the Customer's request, a smooth disc or a fine toothed disc is mounted.
Equipment
optional
  • Maintenance-free SKF hub
  • Spring comb beam
  • Finger comb beam
  • 3D absorber with 35 mm x 35 mm spring
  • ALFA disc 560 mm x 5 mm
  • Front Crossboard heavy duty drag
  • Disc 610 mm x 6 mm + reinforced disc leg
  • ProCut knife roller (hydraulic adjustment)
  • Pneumatic brake
    (4,0 m HP i 4,5 m HP)
  • Hydraulic brake
    (4,0 m HP i 4,5 m HP)
  • Supporting wheels 400/60-15.5 for the trailed version
  • Levelling side covers
  • Delimbe aftercrop seeder
  • APV aftercrop seeder
  • Front reflective plates (mounted machines)
  • Front LED lighting beam
    (trailed machines)
  • Rear LED lighting beam
  • Maintenance-free roller bearing units
Tillage rollers
optional
  • String roller with flat bars Ø 460 mm
  • String roller with cogged bars Ø 460 mm
  • Packer cogged roller Ø 460/550 mm
  • Tubular-ring roller Ø 450 mm
  • Crosskill roller Ø 400/500 mm
  • Ring roller Ø 500/600 mm
  • Spring roller Ø 470/550 mm
  • Rubber roller Ø 500 mm
  • Tire roller Ø 600 mm
  • Roller of steel rings 48-52HRC Ø 600 mm
  • T-ring roller Ø 500/600 mm
  • U-ring roller Ø 540 mm
  • Tandem pipe roller Ø 400 mm plus string roller Ø 400 mm
  • Tandem U-ring roller Ø 540 mm
  • Prismatic roller ORION Ø 500 mm