Case IH Combine Product Specialist Kevin Knapp discusses different types of rasp bars available to Case IH customers, depending on the crops being harvested.
Case IH pioneered rotor development back in the 1960’s. Since then, refinements, enhancements and improvements have led to the pinnacle in rotor performance, the AFX rotor. It features constant pitch impellers that draw the crop and air into the rotor. The AFX rotor can be configured many ways, adapting to both crop and threshing conditions with the use of standard non-spiked rasp bars, spiked rasp bars and straight separator bars. Competitive rotor and cage designs actually can reduce productivity and increase grain damage because of inefficient feeding and crop-control designs.
Case IH offers three different rasp bars:
The rotor itself is the same across the board, but it can be customized at the factory and configured differently for different crops and conditions. For example, the rice rotor will have all spikes, while small grain rotors won’t have any straight bars because they tend to consume power when it comes to crops like wheat. If you have a corn-bean rotor, it will have straight rows in addition to spikes. So basically, there are three different options, and they can come in Standard or Extended Wear.
Editor’s Note: Prior to becoming a Case IH combine specialist, Kevin Knapp spent six years as a combine test engineer for Case IH, traveling the world to test Case IH Axial-Flow combine technology in just about every imaginable crop and condition.