If you’ve been cutting corn long, you remember the old days of stopping and detangling masses of stalk and leaf matter from the row units of your header like our picture above.

Here we’ll try to give you some of the mechanical improvements tied together in our BT Chopper® row unit upgrade kits.  You don’t need a whole new corn head, as on the whole the head units don’t take much of a beating and they are built solid enough to last several decades.

If you’re considering buying a new corn head – first consider mechanically upgrading the row units with BT CHOPPERS – because if you won’t believe our 100% money back guarantee, then you’ll just spend two seasons in your shop overhauling the head.

Improved Nose Cone

The nose cone presents a minimized profile, with maximized flutes.  We keep the spinning nose cones from ever presenting a piece of metal in the way of advancing corn stalks.  The improved nose cones help draw in hesitant stalks in down corn.

Patented Open Window

At the stalk roll itself, you see most manufacturers made the small mechanical mistake of presenting a ‘wall of steel’ that impacts the cornstalk with high-speed spinning “snapping rollers” as they are often called.  Watch these videos demonstrating our patented stalk engagement that will work in ANY environmental condition or stalk moisture.


Reduced Trash Intake

From the first impact that begins to crush and chop the stalk immediately depositing it over the former row; stalk and leaf matter are processed without clogging the cross auger, or entering the feeder house.

Patented Beveled Stripper Plates

The bevel on the stripper plates help reduce butt shelling, and also allow for many ears to be separated from the husks at the first pull. We want to leave all that trash under the row unit and have done all the engineering we can imagine to give those intermeshing blades a positive grasp that will turn the stalk into 2″ confetti.

reduce trash intake in case ih combines 4000 series heads

Your content goes here. Edit or remove this text inline or in the module Content settings. You can also style every aspect of this content in the module Design settings and even apply custom CSS to this text in the module Advanced settings.

Get MORE than you bargained for this fall with Calmer's BT Choppers® and Residue Management Upgrade Kits

With Calmer Upgrade Kits, you're getting more than just corn head parts, you're getting peace of mind that your residue management and corn head problems are solved for good during harvest. 


Agronomic and Mechanical Advantages

Mechanical Advantages

    • Compatible with all Tillage Systems
    • 25% Less Hp Needed than with Chopping Heads
    • Superior Cornstalk Flow to Engagement
    • Better Ear Separation
    • Less Tire Wear
    • Less Butt Shelling
    • Increased Harvesting Speeds (Achieved through a combination of installing Calmer® products and proper combine settings)
    • Lower Spread Load

Agronomic Advantages

    • Unmatched Residue Decomposition
    • Warmer Soils
    • Drier Soils
    • Increased Earthworm Populations
    • Reduced Nitrogen Penalty
    • Easier Planting
    • Higher Yields
dave hula recommends calmer stalk rolls