When your disc blades start looking more like smooth wheels than cutting tools, you know it’s time for replacements that’ll actually slice through crop residue instead of just pushing it around. This 18-inch notched disc blade brings that aggressive cutting action back to your harrow, turning tough corn stalks and matted crop residue into properly sized pieces that’ll break down instead of causing trouble at planting.
What You’re Getting
- Aggressive notched edge design that creates scissor action to slice through tough stalks other blades just bend over
- Quality Boron 15B26 steel construction with 46-52 Rockwell hardness—hard enough to hold an edge, but not so brittle it shatters on field stones
- 9 gauge thickness (3.5mm) provides durability while keeping the blade light enough for responsive soil penetration
- 1.63-inch concavity creates proper soil-throwing action to bury residue and level fields
- Single punch mounting hole for secure, wobble-free attachment
Built for Real Farm Work
This blade fits any disc harrow using 1-1/8 inch square axles with appropriate spacing. Whether you’re working corn ground with heavy residue, breaking up compaction after harvest, or preparing seedbeds, the notched edge excels where you need aggressive cutting action. It’s perfect for front gangs where you want maximum residue chopping power.
Made to Last
Osmundson doesn’t mess around with blade materials—this Boron steel maintains the perfect hardness range to hold an edge through acres of tough tillage work. The standard concavity and thickness give you the right balance of durability and soil penetration without being too aggressive for most conditions.
Good to Know
When replacing blades, never mix worn and new on the same gang—the diameter difference creates uneven cutting that leaves mohawk strips in your field. Keep in mind that notched blades excel in heavy residue but can be too aggressive in light soils or minimal trash conditions. Many operators run notched blades on front gangs for cutting and smooth blades on rear gangs for finishing.
