Description

When you’re breaking up tough crop residue or working heavy ground, a worn-out disc blade just pushes material around instead of cutting it properly. This 20-inch notched blade from Osmundson brings back the aggressive cutting action your harrow needs, turning stubborn corn stalks and matted residue into manageable pieces that’ll break down instead of causing problems next season.

What You’re Getting

Notched edge design creates a scissor-cutting action that slices through tough residue other blades just bend over
Quality Boron 15B26 steel construction maintains hardness at 46-52 Rockwell for long-lasting sharp edges
Combo hole design accommodates both 1-1/8 inch square and 1-1/4 inch square axles for flexible mounting
3/16-inch thickness provides the right balance of durability and flexibility for varied soil conditions
1.88-inch concavity throws soil effectively for proper residue burial and field leveling

Built for Real Farm Work

This disc blade fits harrows and tillers with combo hole mounting systems, commonly found on smaller to mid-sized disc harrows used for seedbed preparation, residue management, and general tillage. The 20-inch diameter makes it ideal for working corn stalks, soybean stubble, and cover crop residue without being too aggressive for lighter soils or finishing work.

Made to Last

The 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 notched edges stay sharp longer in abrasive conditions, and the quality steel construction means you’ll get seasons of reliable service even in rocky or trashy fields.

Installation Notes

This is a direct replacement that fits any harrow using the 1-1/8 x 1-1/4 square combo hole system. When replacing blades, never mix worn and new on the same gang – the diameter difference creates uneven cutting that leaves mohawk strips. A quick tip: if your old blades are stuck, a little penetrating oil on the axle threads helps with removal.