Description

When your disc blades start looking more like smooth 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 disc blade brings aggressive cutting action back to your harrow, turning tough corn stalks and matted crop residue into properly sized pieces that’ll break down instead of hair-pinning around your planter next spring.

What You’re Getting

Aggressive notched edge design that creates a scissor action for slicing through tough stalks other blades just bend over
9-gauge (3.5mm) thickness provides the right balance of durability without excess weight
Combo hole design accommodates both 1 square and 1-1/8 square axle configurations
Standard 1.88-inch concavity for proper soil-throwing action
Boron 15B26 steel construction with 46-52 Rockwell hardness for lasting edge retention

Built for Real Farm Work

Your disc harrow needs to do more than just roll over crop residue – it needs to cut, size, and mix that material into the soil profile. These notched blades attack residue aggressively, with each notch creating a scissor action that slices through tough stalks. The 20-inch diameter gives you good cutting action without being too aggressive for lighter soil conditions, making it versatile for various tillage situations.

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. No fancy coatings here – just quality steel that works.

Installation Notes

When replacing blades, never mix worn and new on the same gang – the diameter difference creates uneven cutting that leaves mohawk strips. Check your spool spacing while gangs are apart; notched blades can require slightly different spacing than smooth blades for optimal performance. Field-proven wisdom: Notched blades excel in heavy residue but can be too aggressive in light soils or minimal trash conditions.