Description
When you’re working through crop residue or preparing a smooth seedbed, having the right disc blade makes all the difference. Smooth blades are ideal for finishing work where you want to create a level surface without the aggressive cutting action that notched blades provide. This 20-inch smooth disc blade from Osmundson gives you that clean finish while handling the day-to-day demands of disc harrow operations.
What You’re Getting
- Boron 15B26 steel construction with 46-52 Rockwell hardness that holds an edge through tough tillage but won’t shatter on rocks
- 7-gauge thickness (4.5mm) provides the right balance of durability and soil penetration
- Standard 1.88-inch concavity creates proper soil flow and mixing action
- Single punch mounting hole fits standard 1-1/2 inch square axles perfectly
Built for Real Farm Work
This blade fits any disc harrow running 1-1/2 inch square axles, from smaller utility units to full-sized field harrows. Many operators run smooth blades on rear gangs for finishing work after notched blades on the front gangs do the heavy cutting. Whether you’re working corn ground, preparing wheat stubble, or smoothing pasture renovation, this blade handles the job without being too aggressive for lighter soils.
Made to Last
Osmundson doesn’t use fancy coatings – just quality steel that works. The heat-treated Boron steel maintains its edge longer than standard carbon steel blades, and the proper hardness range means it’ll bend rather than break when you hit that inevitable field stone or fence post.
Good to Know
Never mix worn and new blades on the same gang – the diameter difference creates uneven cutting that leaves mohawk strips. Check for elongated mounting holes from wear since loose blades wobble and wear prematurely. A quick tip: coat blade edges with used oil when storing your harrow to prevent rust pitting that ruins cutting ability.






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