MAD Concaves: Precision Threshing, Reliable, Durable
No more messing with wires or cover/filler plates. Make it easy to get better harvest results and maximize your profits.
Swapping out traditional round wire combine concaves for our innovative bar-and-grate style modular MAD Concaves™ results in more efficient threshing, getting your grain out of the head and into the hopper quicker for decreased rotor loss and less dockage. This means higher quality crops and more money in your pocket.
MAD Concaves are currently manufactured for Case IH Flagship, Case IH Midrange, New Holland CR 22″ Rotor, John Deere STS/S Series, and John Deere X9 combines.
OUR PARTS ARE SPECIFICALLY DESIGNED TO BE COMPATIBLE WITH THESE COMBINES.
| New Holland - CR | John Deere - STS | John Deere - S Series | John Deere - X9 | Case - Flagship | Case - Mid Range (88 Series) | ||||||
|---|---|---|---|---|---|---|---|---|---|---|---|
| CR 970 | CR 8.80 | 9650 STS | 9770 ST9 | S550 | S770 | X9 1000 | 7010 | 8240 | 1660 | 2377 | 5140 |
| CR 980 | CR 8.90 | 9660 STS | 9780 STS | S560 | S780 | X9 1100 | 8010 | 9240 | 1666 | 2577 | 6140 |
| CR 9070 | CR 9.80 | 9670 STS | 9860 STS | S650 | S790 | 7120 | 7250 | 1688 | 5088 | 7140 | |
| CR 9080 | CR 9.90 | 9680 STS | 9870 STS | S660 | S7 600 | 8120 | 8250 | 2188 | 6088 | 5150 | |
| CR 9090 | CR 10.90 | 9760 STS | 9880 STS | S670 | S7 700 | 9120 | 9250 | 2388 | 7088 | 6160 | |
| CR 8090 | S680 | S7 800 | 7230 | 7260 | 2588 | 5130 | 7160 | ||||
| S690 | S7 900 | 8230 | 8260 | 2166 | 6130 | ||||||
| S760 | 9230 | 9260 | 2366 | 7130 | |||||||
| 7240 | 2177 | ||||||||||
QUICK & EASY-TO-CHANGE DESIGN
Our fast and easy-to-change modular designs allow you to swap out inserts in 15 minutes. This will save you valuable time, which is critical in a busy harvest season.
A modular frame replaces the original concave, fits into the original concave position in the combine, and always stays in place. There is no need to recalibrate the concave clearance! Changing concave now means you only change out much lighter (30 lbs) concave inserts within the frame using two bolts per insert.
MAXIMIZE YOUR COMBINE’S PERFORMANCE
Maximize your combine’s performance efficiency. MAD Concaves are easy to change, which allows you to swap out inserts in minutes and save valuable time. Our cutting-edge concave systems are designed to be as aggressive as the crop and conditions require. As a result, with this precision system, you’ll see reduced dockage and losses for higher quality and better returns.
CUSTOM CONCAVE DESIGN
– Customized to the combine and the crop for peak performance.
– Built to last with high-quality abrasion-resistant (AR-200) hardened steel, which allows for more extended wear and precision sharpness.
– An easy-to-change design will enable you to customize your combine to the crop with different precision grate spacings.
Going from alfalfa to chickpeas or wheat to corn, MAD Concaves removes the hassle of changing concaves so you feel comfortable switching them out to get the best crop results during harvest.
DEVELOPED FOR FARMER SUCCESS
We define success as helping you achieve the highest levels of yield and quality possible while increasing your efficiency and profitability through our innovative concaves.
The O-Grate: The Market’s Precision Concave for Corn, Soybeans & Milo
Why the O-Grate Concave is a Game Changer
Increase Throughput & Capacity: The perforated ladder design optimizes the flow of corn, soybeans, and milo through your combine (reduce plugging!), significantly increasing throughput and capacity.
Improve Sample Quality: The precision engineering of the O-Grate ensures cleaner samples of corn, soybeans, and milo. Get rid of more green pods in soybeans for a cleaner sample and better grain storage.
Minimize Grain Loss: The O-Grate concave minimizes grain loss by ensuring that more of the crop makes it into the hopper.
Maximize Farm Profits: More efficiency and higher quality results your farm directly benefits from.
O-Grate Samples in the Field
Hear it from Farmers like Larson Farms & Travis Hughes!
Larson Farms and many other farmers across North America use the O-Grates to maximize their harvest.
View all our MAD Concave Options
The numbers .225, .300, .375, and .437 represent the measurement of the gap between the bar; the gap being .225 of an inch. For more information on the right configuration for your combine and crop, continue scrolling down.
.225 Concave
- Front position
- Reduce dockage
- Hard thresh crops
- Wheat, flax, canary seed
.375 Concave
- Mostly used in the second position but used in front position for large cereal crops that need some threshing
- All crops
.300 Concave
- Front position
- Allows more seed out of concave reducing rotor loss
- Large easy thresh cereals
Finger Grate Concave
- Front position
- New design for shatter-resistant canola
- Minimal threshing
- Increased separation
- Canola, peas, barley, oats, sunflower
.435/.437 Concave
- First and second position
- Ideal for very easy thresh crops like hemp
- Very large seed crops, chickpeas, faba beans
Slotted Concave
- No threshing, full separation
- No cracking
- Edible beans, canola, sunflower
Alfalfa Concave
- Both positions
- Specially designed
O-Grate Concave
- Perforated, ladder-style
- Full separation
- Clean sample
- Soybeans, Corn, & Milo
Round Bar Concave
- Both positions
- Full separation
Hard Threshing Kit – Cereals
- Hard thresh conditions
- Use example: Hot and dry 2024 N.A. Summer with small baked into the heads
Split Frame Designs
The split frame MAD Concaves with modular inserts for John Deere STS/S Series, Case IH Midrange, and New Holland CR 22″ Rotor combines were developed to be lighter (68 lbs) and easier to handle and install into the combine. Once the frame is installed it is never removed, and the modular concaves (30lbs) 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 save on people power and recalibration time.
New Holland split frame concave with interchangeable modular inserts. Learn more.
S & STS Series John Deere split frame concave with interchangeable modular inserts. Learn more.
Which Concaves do I Need for my Combine & Crops?
View our MAD Concaves configuration guides by combine type to learn more about what concaves you need for your crop and combine. Already have MAD Concaves? View our suggested combine settings guides. Select an option below.
Hear what farmers are saying about MAD Concaves!
Amazing on All Crops Hard to Thrash!
“We have been using them for years. They are amazing in all crops hard to thrash. We combine red clover, alfalfa and flax with no blanks, the wheat is so clean this year it looks like it has been cleaned. It is interesting to note that they have built a half set and hangers that are easy to change for a JD as well! I can change the four concave in ours in 10 mins total. You will be happy with the grain saving!”
Staff – Great to Deal with and Provided Ample Information and Advice
“We are very happy with our MAD Concaves. Keeping the frames in the combine makes changing concaves between crops a one person job. You can mix and match what grates you’d like to use depending on the conditions, making them very versatile.
We were able to open up the clearance and increase capacity, while either improving or keeping the sample consistent. We saw fewer whitecaps in wheat along with less cracking. Capacity in canola also increased, and we were also able to greatly reduce un-thrashed bols in flax, even under less than ideal conditions.
We were worried we might miss filler plates. But, there was no looking back. Staff was great to deal with and provided ample information and advice. We’re very happy with our investment, thank you!”
Stronger. Easier to Work With.
“Think diesel tuner or 6” lift for your diesel truck. They are beefier. Stronger. Easier to work with. In addition, the company has a real knack for customer service. They may be slightly rough around the edges but they know their stuff. And they appreciate their customers. We bought a set of concaves for one of our CR combines and it does a better job of threshing and cleaning the grain than the stock concaves. When we bought it though, they provided very specific combine settings that were quite different than the settings we had been using for years. And it worked. Low throw over. Cleaner sample.”
Changeable Inserts is a Fantastic Idea.
“Bought 6 of these this year. Was able to pick up .5-.7 mph in canola due to reduced losses, and the changeable inserts is a fantastic idea.”
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