SKU: SMA-114-18360317N Notched Disc Blade for Standard Disc Harrows

When your disc harrow starts rolling over crop residue instead of cutting through it, you know it's time for fresh blades. Worn discs just push stubble around instead of properly sizing and burying it, leaving you with a mess that'll plug up your planter next spring. This 18-inch notched disc blade brings back that aggressive cutting action that turns tough stalks into properly sized pieces.

What You're Getting

• Notched edge design that creates a scissor action to slice through tough residue rather than just bending it over
• Combo hole design fits both 1-1/8 and 1-1/4 inch square axles for versatility across different harrow brands
• Made from Boron 15B26 steel with 46-52 Rockwell hardness that holds an edge through acres of tough tillage
• 3/16-inch thickness provides durability without being too heavy for smaller harrows
• 1.63-inch concavity creates proper soil throw for effective residue burial

Built for Real Farm Work

This blade fits standard disc harrows used for primary tillage work—breaking up corn stalks, sizing soybean stubble, and incorporating cover crops. The 18-inch diameter makes it ideal for lighter to medium-duty harrows that handle everything from spring field prep to fall residue management. Whether you're working corn ground after harvest or prepping seedbeds in the spring, this blade delivers the cutting performance you need.

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. Osmundson doesn't mess around with blade materials, and this one's built to handle the bumps and rocks that come with real farm work.

Good to Know

Notched blades excel in heavy residue but can be too aggressive in light soils or minimal trash conditions. Many operators run notched blades on front gangs for cutting, smooth on rear for finishing. The combo hole design means you won't need different blades for different axle sizes. Track your blade wear by measuring diameter annually; most blades are shot when they've lost 3-4 inches.