Description

When you need your disc harrow to cut cleanly through crop residue and provide a smooth finishing pass, this 20-inch smooth disc blade is your go-to replacement. Unlike notched blades that aggressively chop through heavy residue, smooth blades give you that clean, even finish that sets up your seedbed perfectly for planting season.

What You’re Getting

Premium Boron 15B26 steel construction that holds up to rocks and tough field conditions
46-52 Rockwell hardness rating – hard enough to stay sharp, tough enough not to shatter
7 gauge thickness (4.5mm) provides the perfect balance of durability and soil penetration
Combo hole design fits both square axle sizes, giving you flexibility during installation
1.88 inch concavity throws soil effectively while maintaining smooth operation

Built for Real Farm Work

This blade works great on disc harrows that handle everything from breaking up corn stubble to preparing smooth seedbeds. Whether you’re working through last season’s crop residue or making that final pass before the planter, smooth blades like this excel at creating an even surface without the aggressive cutting action that can sometimes leave your field looking chopped up.

Made to Last

Osmundson doesn’t mess around with blade materials. This Boron steel maintains that sweet spot – hard enough to hold an edge through acres of tough tillage, but not so brittle it’ll crack when you hit that inevitable field stone. The 7 gauge thickness gives you plenty of material to work with as the blade wears down naturally over the seasons.

Good to Know

The combo hole design means this blade fits harrows with either size square axle in that range – handy when you’re not sure what’s on your particular machine. When replacing blades, never mix worn and new ones on the same gang since the diameter difference will leave you with uneven cutting. Check your blade wear by measuring diameter annually – most are ready for replacement when they’ve lost about 3-4 inches from the original 20-inch size.