Set Your Combine Rotor Speed for a Successful Corn Harvest

Properly setting rotor speed on your combine is critical to an efficient corn harvest. Rotor speed can result in un-threshed ears or cracked grain in the tank, and we want to help you identify the various effects rotor speed has on performance.  To properly adjust, increase rotor speed until cracked kernels appears in the grain tank, then slowdown by 10 RPM. This adjustment applies to all color of combines. 

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Identifying Factors for Setting Rotor Speed

One way to identify if rotor speed is too high is to evaluate the stream of grain traveling from the rubber shoot into the grain cart. If you see a small stream of ‘corn meal’ or fines in the sample, ease up on rotor speed.

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The right angle of attack improves wear life and effectiveness of the stalk rolls. Park the combine on a level surface and lower the header until the lowest point of the row unit is approx. 2-inches above the ground. Place a protractor on the plates to measure the angle. Try to achieve 23-25 degrees in standing corn. 

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