1. 1 Qualidisc – a success story!

2. 1. The most versatile compact disc on the market 1. Able to work from 2 to 15 cm 2. Able to work on all types of conditions: a) On wheat/barley stubbles b) On rape stubbles c) On sunflower stubbles d) On soya beans stubbles e) On maize stubbles (chopped or non-chopped) f) On grass land g) After ploughing e) For destroying intermediate crops with big amount of residues f) Even in wet conditions The 5 reasons of the success 215

3. 2. Some key features 1.Big disc diameter : 573x6mm or 520x5mm a) Perfect cutting quality even at shallow work (3- 5 cm) b) High capacity with big amount of residues & ploughed lands c) Long lifetime even in sandy soils 2.Conical disc shape for: a) Constant cutting angle whatever the disc diameter is. b) Good penetration with the aggressive angles (not necessary to add weights) 3.Heat treated disc at 55-58 HRC (200kg/mm²) The 5 reasons of the success

4. 2. Some key features 4.Strong & reliable bearings a) No maintenance bearing b) Oblique contact ball bearing for high radial and axial load capacity c) Perfect sealing system d) Big shaft diameter (35 mm) e) Easy change possibility (hold by one nut) f) Locked by special washers 5. Strong disc arm: a) Tubular arm to face to high lateral forces b) Hub nut protected into the disc arm The 5 reasons of the success 2 ball bearing with oblique contact 40° Seal with 5 lips Shaft ø 35 mm O-ring

5. The 5 reasons of the success 3. Perfect working quality Kverneland Qualidisc Competition 1.Impeccable cutting quality thanks to: a) Notches to avoid any lateral movement during work for a fixed cutting angle and perfect cutting quality b) Strong torque of the rubber safety system c) The lateral overlapping adjustment 2. Good levelling quality: a) Long deflectors to maintain all the soil flow b) Mounted on parallelogram to follow the ground contour c) Deflectors can release when stones or straw accumulation d) Parallelogram lateral adjustment e) Levelling harrow to control the soil flow f) Central tine in the middle on fold machines

6. The 5 reasons of the success 4. Friendly settings 1.Depth control: a) Easy adjustment of the working depth by hydraulic cylinders b) Easy depth control adjustment by spacers on mechanical or hydraulic depth adjustment c) Easy depth adjustment on front wheels (Qualidisc T) 2. Lateral deflectors: a) Easy depth adjustment by pins

7. 7 5. Exhaustive quality tests before production 1.Strain gauge tests (strains measurement): a) Transport test with bumps at 15 km/h b) Working test with difficult conditions (turns, stones,…) c) Data measured and analyzed 2. FEM (Finite Element Module) calculation: a) R&D designs the different parts and connections b) Data measured at the strain gauge tests are loaded in the software c) Weak point are analyzed and corrected 3. Shaking tests: a) Represents 10 years lifetime b) Reproduce the strains measured at the strain gauge tests in transport folded and unfolded c) Analyses and modifications done if needed 4. Field test The 5 reasons of the success

8. Thanks for your attention! The 5 reasons of the success