Terranflex logo with orange and gray text.

Improve the Performance of Your 1850, 1860 or 1890 Air Drill with a TerrainFlex.

The TerrainFlex by Applequist Manufacturing, Inc. was created to address issues with 30', 36', 40' and 42' three-section 1850, 1860, and 1890 Air Drills on uneven terrain. If you own one of these drills and do contour farming, particularly with a lot of terraces, you’ve probably experienced the frame frequently lifting off the ground, creating uneven down pressure. 

Diagram comparing the before and after of a factory rigid frame agricultural implement. The diagram shows tire leaves ground, poor seed depth control, and rigidly mounted to the frame. A photo of a green planting machine with large yellow wheels working on soil, and a close-up of a wheel with an arrow pointing to the wheel and a label indicating it is a front castor wheel.
Diagram of TerrainFlex Pivoting Walking Beam on a tractor, showing rear wheel pivot down, better seed depth control, and maintenance-free pivot point. Next to the diagram, an image of a green tractor with attached soil planting equipment on a field.
Green John Deere farming equipment with yellow wheels on a farm field

For those times when extra weight is desired, we have developed an add-on weight bracket that fits on the rear of the TerrainFlex frame pivot.

Optional Weight Bracket

Text reading "Made in Rural America" on a brown background with black text.

The development of the TerrainFlex concept was originated and field-tested by two Kansas farm families.


Friends and coworkers, Mike Ohnsat and Brady Cline, began discussing issues they both saw with their air drills on their family farms, particularly going over terraces. Both families wanted to address problems with keeping the openers in the ground and ultimately optimize profitability. 

Mike and Brady set out to solve the problem. They came up with the “walking beam” solution. They each put a set on their 1890 air drills and - after 40,000 acres of field-testing — they brought the product to Applequist Manufacturing for production. 

Two men standing outdoors on grass in front of green farming equipment, smiling at the camera, with trees in the background.

(Left) Mike is a Design Engineer at Great Plains Manufacturing. (Right) In 2019 Brady joined Applequist Manufacturing as Plant Manager. Both also continue to farm with their families, Mike with his father and Brady with his father-in-law.

Green TerraFlex landscape implement attached to a tractor on a farm with a silo in the background.

HOW TO PURCHASE

If you feel a TerrainFlex kit would improve the performance of your air drill, just give us a call at 970-691-6000.

Through the partnership formed between Applequist Manufacturing and Quality Drills, we are able to provide you with excellent product support, anywhere in the US.

For more information, visit www.qualitydrills.com/terrainflex, call us at (970) 691-6000 or email sales@qualitydrills.com