When your disc harrow starts pushing residue around instead of cutting through it, worn blades are usually the culprit. A sharp, properly-sized disc blade makes all the difference between a job well done and having to make extra passes. This 18-inch smooth blade from Osmundson brings back that clean cutting action you need for effective residue management and seedbed preparation.
What You’re Getting
- 18-inch diameter provides aggressive cutting while maintaining good soil flow
- 9-gauge thickness (3.5mm) gives you the strength for tough conditions without being overly heavy
- Boron 15B26 steel construction with 46-52 Rockwell hardness holds an edge through rocky soils
- Smooth edge design creates a clean cut and excellent soil mixing for finishing work
- Single punch mounting hole fits securely on 1-1/8 inch square axles
Built for Real Farm Work
This blade fits disc harrows with 1-1/8 inch square axles, making it perfect for smaller to mid-size disc harrows commonly used for seedbed prep, residue management, and secondary tillage. Whether you’re working down corn stubble or preparing fields for planting, smooth blades like this excel at creating an even finish.
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 9-gauge thickness provides durability without adding unnecessary weight to your harrow.
Good to Know
Installation is straightforward with the single punch hole design. When replacing blades, never mix worn and new on the same gang – the diameter difference creates uneven cutting that leaves mohawk strips. Track your blade wear by measuring diameter annually; most blades are shot when they’ve lost 3-4 inches. At 18 inches starting diameter, you’ve got good life ahead if maintained properly.
