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
- Aggressive notched edge that creates a scissor action to slice through tough stalks other blades just bend over
- Quality Boron 15B26 steel construction with 46-52 Rockwell hardness that holds an edge through acres of tough tillage
- 9-gauge thickness at 3.5mm provides the right balance of durability and flexibility for smaller harrows
- Combo hole design fits 7/8 square x 1 square axle configurations
- Standard 1.88-inch concavity for proper soil-throwing action and residue burial
Built for Real Farm Work
This blade fits disc harrows using the common 7/8 square x 1 square axle setup, which you’ll find on many smaller to mid-size tandem disc units. These are the workhorses for breaking up corn and soybean residue, preparing seedbeds, and working cover crop ground before planting season kicks into high gear.
Made to Last
Osmundson doesn’t mess around with blade materials – this Boron 15B26 steel maintains the perfect hardness range, hard enough to hold an edge through acres of tough tillage, but not so brittle it shatters when you clip that hidden field stone. The 9-gauge thickness gives you plenty of service life without being so heavy it bogs down smaller tractors.
Good to Know
Installation’s straightforward – just make sure you replace blades in complete gangs to avoid diameter differences that leave uneven cutting. Check for elongated holes from wear since loose blades wobble and wear prematurely, and when storing your harrow, coat blade edges with used oil to prevent rust pitting that ruins cutting ability.
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