Smooth Disc Blade for Disc Harrows with 1-1/2 Square Axle

Description

When your disc harrow starts leaving streaks instead of smooth, worked ground, it’s usually the blades talking. If you’ve got worn edges that won’t cut or bent blades that won’t roll straight, this 20-inch smooth disc from Osmundson gets your tillage tool back to doing what it does best. 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.

What You’re Getting

• 20-inch diameter smooth edge for finishing passes and residue mixing
• Boron 15B26 steel construction with 46-52 Rockwell hardness that stays sharp season after season
• 3/16-inch thickness that’s thick enough for durability but light enough for good soil penetration
• Single punch mounting hole for secure attachment to your 1-1/2 inch square axle
• Standard 1.88 inch concavity creates proper soil flow and mixing action

Built for Real Farm Work

These blades fit any disc harrow using 1-1/2 inch square axles with appropriate spacing. Whether you’re running a tandem disc for seedbed prep, working down corn stalks after harvest, or smoothing out pasture renovation, this blade handles the job. The smooth edge excels at final passes where you want to size residue and create a level surface without being too aggressive.

Made to Last

Osmundson doesn’t mess around with blade materials. No fancy coatings here – just quality steel that works. The Boron steel formulation gives you the perfect balance of hardness and toughness, so you get long wear life without worrying about breakage when you hit that inevitable rock or steel stake.

Installation Notes

When replacing blades, never mix worn and new on the same gang – the diameter difference creates uneven cutting that leaves mohawk strips. The single punch mounting means checking for elongated holes from wear – loose blades wobble and wear prematurely. A quick tip: Track your blade wear by measuring diameter annually; most blades are shot when they’ve lost 3-4 inches.