KX7 concaves are replacement upgrades to the standard concaves installed in Case IH, Challenger, John Deere, and Massey-Ferguson combines. Utilizing proprietary box inserts that can be individually installed to maximize performance against farmers’ specific crop and field conditions, KX7 concaves allows users to Take Control of Their Harvest.

Learn about the KX7 concave system benefits under Why KX7

KX7 History

KX7 concaves began with the work of Sunnybrook Welding, a long-time innovator of combine rotors, concaves, and threshing components. Their “Box Concave” design was first introduced in 2010, and grew quickly in Western Canada and parts of the United States and Australia.

In 2012, Kondex Corporation, a leading American manufacturer of high-quality agricultural components, was approached by Sunnybrook to form a partnership that continued the worldwide rollout of these concaves. In 2013, Kondex formed a strategic alliance with Sunnybrook and purchased all the patents and rights to its box concave design. Kondex launched KX7 as a distinct brand this same year to build greater awareness for this innovative product. Today, KX7 concaves are manufactured in America and distributed globally, with the Canadian market being continually supported by Sunnybrook Welding.

In 2014, KX7 introduced its second generation of concaves that incorporated numerous design improvements gained through observation, testing, and communications with farmers in Argentina, Australia, Canada, Mexico, and the United States against varying crops and conditions. With the mission of empowering operators to Take Control of Their Harvest, KX7’s engineering philosophy incorporates close collaboration with farmers and end users worldwide. This relationship between farmers and engineers will remain our focus to ensure KX7 continually respond to farmers’ changing needs.

Kondex innovations brought further advancements to KX7 concaves in 2015, when we upgraded all MaxThreshTM boxes to come standard with our TungstrongTM wear additive on the threshing bars. This improvement came without a cost increase to end users, but highly increased the value and life of our concave assemblies. By protecting the shape of the interrupter bars, the improved threshing gained from our design remains like-new well beyond that of competing concaves - resulting in less frequent replacement and a much better ROI!


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