Grass Knife (7700-7980 series)

Manufactured in Iowa, the Kooima Ag K81123 Grass Knife is designed to provide exceptional durability and precise cutting performance for John Deere® 7700-7980 Forage Harvesters. This heat-treated knife features a tungsten carbide hard-facing, ensuring a long service life even under heavy use and harsh conditions. Perfectly suited for chopping forage, such as hay, alfalfa, winter wheat, and cover crops, this grass knife is an essential component for maximizing your harvester's efficiency. 

Key Features: 

• Tungsten Carbide Hard-Faced Edge: The K81123 knife is built with a tungsten carbide edge that offers superior durability, enhancing the knife's ability to withstand wear from tough materials. This feature ensures a long-lasting, sharp edge for precise cutting.
• High performance grass knives for longer durability see K81123HP.
• Precision Fit for John Deere® Forage Harvesters: Designed specifically for John Deere® Forage Harvesters, the K81123 grass knife offers a precise fit that works in conjunction with the shearbar to efficiently chop the forage into small pieces, ideal for cow consumption.
• Optimized Cutting Performance: The K81123 is designed with a less intense cutting angle compared to corn knives, allowing it to handle rocks and debris better less chipping. This makes it perfect for pickup work in hay, alfalfa, winter wheat, and cover crops.
• Installation Guidelines: For installation, use bolt K69650 3 required per knife.  Ensure that bolts are torqued to the recommended specifications to guarantee secure installation.
• Designed for Durability: The K81123 knife is built to handle demanding conditions, providing reliable performance in your forage harvesting operations.  

Knife Replacement: Regularly inspect the knife for signs of wear, such as heavy chips or the loss of tungsten carbide on the cutting edge. Replace the knife if you notice longer cut lengths or excessive wear to maintain optimal cutting efficiency. 

Additional Information: 

• Quantity Needed: 40, 48, or 56 knives are required per drum, depending on the cutter drum setup, to achieve the best cutting performance.
• Corn Knife Option: For silage and earlage cutting, we recommend using the K72500 corn knife.
• US Patent # 11,642,741 

Why Choose Kooima Ag? 
Kooima Ag is committed to delivering high-quality, durable agricultural products. Our equipment is proudly made in the USA and rigorously tested year-round in real-world conditions to ensure peak performance. We focus on innovation, with advanced manufacturing processes like heat-treating and chrome plating to enhance longevity. Our customer service is dedicated to providing support and quick replacement parts, minimizing downtime. When you choose Kooima Ag, you get reliable, high-performance products backed by decades of expertise and a commitment to excellence.