We demo’d a set of O-Grates in an X9 this fall in both soybeans and corn. We found it noticeably easier to get a high-quality sample than with competitive concaves and picked up ground speed while achieving near zero yield loss. Amazing! We have already ordered O-Grates for all our machines next fall. 

Travis HughesO-Grate MAD Concave operator - South Dakota, USA

Really clean sample. Was able to run combine to full engine load with 45 foot head. Not common.

Heath FoiekO-Grate MAD Concave operator - Platte, South Dakota


We love them! They are a lot lighter and easier to deal with than the stock concaves, they’re amazing.

Brent FastTurtle Lake, ND

Love em, absolutely love em, people ask about them and I’d do it again in a heart beat.

Jeff EllweinHazen, ND

They are excellent, super quick to change between crops, they do a better job than factory ones. I brag about them to everybody.

Eric EvansonColeharbor, ND

We all like them, I bought a set, my neighbors, we really like them a lot! We like the small grain concaves, the fingers. Easy for us old guys to change in and out. My fingers were clogging up, Murray told me to switch them around, and that worked great.

 Daniel ErickstadWebster, ND

The entire set has paid for itself many times over and saved us a lot of money and time!

Manfred GrossFort Vermilion, AB

Very accurate and easy to use. Combine losses varied from 0.4bu to 9bu/ac. The easiest way I have improved a farmers bottom line.

Jeff SmithCrop Consultant, Choiceland, SK

It’s so easy to use even my kids can do it!

Melissa DamianiAgronomist and Farmer Rimney, AB

The set comes with all the tools needed for the task. From measurement, cleaning to calculating. We saved 1 to 3 bu/ac, that´s 11 to$33/ac! Well worth the product cost and the few minutes it takes to test harvest losses!

Dan Jan FarmsElm Creek, MB