CLAAS | Straw Chopper Knife – Serrated | Schumacher Radura PrimeLine | A03L6
Genuine Schumacher A03L6 | Serrated-edge tungsten carbide coated straw chopper knife designed for CLAAS combine straw chopper systems using Schumacher Radura PrimeLine components. Suitable as a replacement for OEM reference numbers 7557860 and 75557840.
Manufactured by Schumacher, the OEM supplier of Radura cutting systems used in many CLAAS combines, this serrated straw chopper knife delivers aggressive cutting action for demanding residue conditions while maintaining excellent durability in high-hour harvesting environments.
The cutting edge features a laser-clad tungsten carbide coating with extremely hard, embedded carbide particles. This advanced wear technology provides exceptionally high wear resistance and a significantly longer service life than standard serrated chopper blades, even in abrasive straw and residue conditions.
As the knife wears, the carrier material wears faster than the carbide coating, creating a continuous self-sharpening effect. This ensures the serrations remain effective and cutting performance stays consistent throughout the service life.
A sharp, aggressive cutting edge helps maintain stable engine load and power demand, reducing unnecessary energy loss and minimizing fuel consumption while improving chopping efficiency in heavy or damp straw conditions.
Designed for clean, efficient straw shredding and uniform residue distribution, this knife supports improved residue management, faster straw breakdown, and better soil incorporation after harvest.
See the specifications table below for dimensions and mounting details
Product Specifications
| Specification | Details |
|---|---|
| Brand (OEM Fitment) | CLAAS |
| OEM Part | 7557860, 75557840 |
| Our Part Number | A03L6 |
| Product Line | Radura PrimeLine |
| Blade Type | Serrated Edge |
| Total Length (L) | 173 mm (6.811") |
| Width (W) | 50 mm (1.969") |
| Thickness (T) | 4 mm (0.157") |
| Bore Diameter (B) | 20.1 mm (0.791") |
| Bore Spacing (LB) | 150 mm (5.906") |
| Wading Length (BL) | 90 mm (3.543") |
| Radura BasicLine Equivalent | 51582.10 |
Special Features
| Feature | Details |
|---|---|
| Tungsten Carbide Coating | Extremely high wear resistance Significantly longer service life than standard blades |
| Laser Cladding Technology | Strong carbide-to-steel bond Consistent wear protection under abrasive conditions |
| Self-Sharpening Serrations | Base material wears faster than coating Serrations remain aggressive over time |
| Serrated Blade Design | Improved cutting in heavy or damp straw Enhanced chopping performance |
| Reduced Power Demand | Stable engine load during operation Helps reduce energy use and fuel consumption |
| Radura PrimeLine System | Designed for PrimeLine applications BasicLine equivalent available under part number 51582.10 |
This product is on order
If you have any questions at all please fill out the Pre-Order Form below or reach out to us at 204-878-9296