Because DR knives are made of high-carbon/high-chromium forged alloy tool steel, they can go significantly longer than the knives on most "bargain" chippers without sharpening. Still, as with any cutting tool, keeping a sharp edge is important for maintaining peak performance. When the chipper starts to "bog" down, and/or vibrates and requires that you regularly force the material downward into the chipper chute, it's usually a sign that the knife is dulling. For maximum productivity it pays to keep an extra knife to have on hand. That way, you can keep working with a minimum of downtime.
Includes hardware and gauge.
Please refer to your owner's manual for sharpening and installation instructions.
TIP: If chipping a lot of soft wood (pine, spruce etc.), and pitch build up is observed on the knife, it is recommended to occasionally chip some hard wood to clean the pitch off the knife.