When you’re prepping seedbeds or working through light to medium crop residue, you need disc blades that cut clean without being overly aggressive. This 20-inch smooth blade from Osmundson strikes that balance perfectly—smooth blades work well on rear gangs for finishing after your front gangs have done the heavy cutting work.
What You’re Getting
- 20-inch diameter gives you good cutting width without being unwieldy for medium-duty harrows
- 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
- 3/16-inch thickness provides durability while keeping weight manageable
- Combo hole design works with most standard axle configurations
- 1.88-inch concavity creates proper soil movement without excessive draft
Built for Real Farm Work
This blade fits disc harrows with 1-1/8 x 1-1/4 square axle setups—the size you’ll find on many mid-sized harrows used for seedbed preparation, stubble management, and incorporating fertilizer. Whether you’re running it behind a 150-hp tractor working bean stubble or touching up fields before planting, it’s sized right for the job.
Made to Last
No fancy coatings here – just quality steel that works. This Boron 15B26 steel maintains the perfect hardness range to handle seasons of field work while resisting the kind of chipping and cracking you get with cheaper blades.
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. Track your blade wear by measuring diameter annually; most blades are shot when they’ve lost 3-4 inches. When storing disc harrows, coat blade edges with used oil to prevent rust pitting that ruins cutting ability.
