Description
When your disc harrow starts pushing crop residue instead of cutting it up, worn blades are usually the culprit. This 18-inch notched disc blade from Osmundson brings back that aggressive cutting action you need to slice through corn stalks, bean stubble, and tangled residue that would otherwise wrap around your planter coulters come spring.
What You’re Getting
- Aggressive notched edge design that cuts rather than just pushes residue around
- Combo hole mounting fits both square and round axle systems for versatility
- 9-gauge thickness provides the right balance of durability and soil penetration
- Standard 1.63-inch concavity moves soil effectively without overworking it
- Boron steel construction with 46-52 Rockwell hardness for long-lasting cutting edge
Built for Real Farm Work
This blade fits disc harrows with 1-inch square by 1-1/8-inch square axles, making it a common size for many mid-size harrows. Whether you’re working corn ground in the fall, preparing soybean stubble for next year’s crop, or breaking up pasture sod, the 18-inch diameter gives you good soil mixing without being too heavy for your harrow frame.
Made to Last
Osmundson builds these blades from Boron 15B26 steel that’s heat-treated to the right hardness—tough enough to handle rocks and debris, but not so hard it chips or cracks. The notched edge design creates multiple cutting points that stay sharp longer than smooth blades, and when they do wear, you’ll still have cutting action until replacement time.
Good to Know
The combo hole design means this blade works on harrows with either square or round axles—handy if you’ve got mixed equipment or aren’t sure what you’ve got. Check your blade spacing when replacing; 18-inch blades typically run on 7 to 9-inch centers. If you’re doing a partial replacement, put the new blades on the front gang where they’ll do the most cutting work.
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