Description
When your disc blades start looking more like smooth wheels than cutting tools, it’s time for replacements that’ll actually slice through residue instead of just pushing it around. This 20-inch notched disc blade from Osmundson brings aggressive cutting action back to your harrow, turning tough corn stalks and matted residue into properly sized pieces that’ll break down instead of hair-pinning around your planter next spring.
What You’re Getting
- Notched edge design creates a scissor action that slices through tough stalks other blades just bend over
- Boron 15B26 steel construction with 46-52 Rockwell hardness for durability without brittleness
- 3/16 inch thickness provides the right balance of strength and aggressive cutting performance
- 1.88 inch concavity creates proper soil-throwing action for effective residue burial
- Single punch mounting hole fits standard 1 inch square axle harrows
Built for Real Farm Work
Your disc harrow needs to do more than just roll over crop residue – it needs to cut, size, and mix that material into the soil profile. This blade fits any disc harrow using 1 inch square axles and excels in moderate to heavy residue conditions where you need to break down corn stalks, wheat stubble, or cover crop material.
Made to Last
Osmundson doesn’t mess around with blade materials. This Boron 15B26 steel maintains the perfect hardness range – hard enough at 46-52 Rockwell to hold an edge through acres of tough tillage, but not so brittle it shatters when you clip that hidden field stone. The 3/16 inch thickness gives you the cutting aggression you need while maintaining long service life.
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. Field-proven wisdom: 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, smooth on rear for finishing.
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