A modular frame (green) replaces the original concave, fits into the original concave position in the combine and ALWAYS stays in place. Changing concaves now means you only change out two “concave inserts” (black) per frame.
Reduced rotor loss
Quick and easy to change concave inserts
Saves time when moving between different crops and conditions
Longer wear and precision sharpness for aggressive threshing
The new split frame MAD concaves with modular inserts, for John Deere was developed to be lighter (30kg) and easier to handle and install into the combine. Once the frame is installed it is never removed, and the modular concaves (15kg) are easy to insert and quick to swap out in mere minutes with two bolts per insert. With this design, you’ll optimize your yield and saves on people power and recalibration time.
Already have MAD Concaves? View our suggested combine settings guides.
The Starter Kit: MAD-K-JD-01 is ideal for Barley, Canola, Wheat, Lupins and Soybeans. This concave kit will suit most conditions and most crops. The innovative design on the MAD Concaves inserts have incredible threshing abilities. High quality AR200 metal allows for longer wear and precision sharpness. The numbers .225, .300, .375, .437 represent the measurement of the gap between the bar; the gap being .225 of an inch.
Compatible with: John Deere STS 9650, 9750, 9660, 9760, 9860, 9670, 9770, 9870, S650, S660, S670, S680, S690, S760, S770, S780, S790.
• Innovative design
• Minimal Threshing
• Canola, peas, barley, oats, sunflower, corn, soybeans
• Front or Second Position
• Hard to thresh crops
• Wheat, flax, Frosted Crop
• Allows more seed out of the concave, reducing rotor loss
• Large easy thresh cereals
• Large cereal crops that need some threshing
• All crops
• Ideal for very easy to thresh crops such as hemp
• Chickpeas, faba beans
• No threshing, full separation
• No cracking
• Edible beans, canola, sunflower
• Both positions
• Specially designed to suit lucerne
• Full separation
