When your disc blades start looking more like dull 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 blade from Osmundson brings aggressive cutting action back to your smaller disc harrow, tackling crop residue and weeds with each aggressive notch creating a scissor action that cuts what smooth blades can’t.
What You’re Getting
- 20-inch diameter with aggressive notched edge design for superior cutting in heavy residue
- Boron 15B26 steel hardened to 46-52 Rockwell scale – tough enough to hold an edge but won’t shatter on rocks
- 7-gauge thickness and combo hole design for durability without unnecessary weight
- Standard concavity creates proper soil flow and residue burial action
Built for Real Farm Work
This blade fits disc harrows with 7/8 inch square by 1 inch round combo axles, commonly found on smaller to mid-size tillage equipment. Whether you’re working corn ground, breaking up wheat stubble, or preparing seedbeds, the notched edge excels in conditions where residue management is critical for the next crop’s success.
Made to Last
Osmundson doesn’t mess around with blade materials. This high-carbon boron steel maintains the perfect hardness range – hard enough to hold a sharp edge through acres of tough tillage, yet engineered to flex without breaking when you hit that hidden field stone or fence post.
Good to Know
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 blades on rear for finishing. 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.
