Updated at 2021-01-23 10:18:50 UTC
The discussion on Estes concave settings requires that we know about Estes concaves first. Estes is a leader in the manufacturing of some of the best concave systems in the world. Advanced technology and engineering coupled with state of the art design go into the making of Estes concaves. The all crop concaves from Estes ensures that there is no rotor loss and the grain damage is minimal. This helps in increased profits in the long run.
How Does A Combine Concave Work?
Coming to Estes concave settings, it is important that we first know how concaves work. Concaves are actually part of the threshing unit of a combine harvester. The threshing units consist of a rotating motor attached to a rotating cylinder and the concave placed at the distance from the cylinder. This creates a gap between the rotating cylinder and the concave, Harvested crop goes into this gap and the rotating cylinder smashes it against the concave. This results in the seeds separating from the plant and going through the opening in the concave.
The Best Estes Concave Settings
Now that we have understood the role of a concave in a combine harvester, it becomes easier to comprehend what the Estes concave settings should be. There are 3 things to consider in determining the Estes concave settings and they are the speed at which the cylinder is rotating, the gap between the cylinder and the concave, and the spacing between the wires and bars of the concave.
Speed and Gap
If the speed of the rotating cylinder is too much and the gap between the cylinder and the concave is narrow then it would damage the grains. If the gap is wide, the harvest would not get threshed. Striking a balance between the speed of the rotating cylinder and the gap between the concave is highly important. The quality of the produce and consequently profits depend on it.
Bars and Wires
A concave is made up of a net of bars and wires. The bars are curves and placed vertically while the wires run across horizontally creating an inwardly curved net like structure with intermittent openings. The threshed grains pass through these openings. Narrow spaces between the wires make small openings and are great for threshing grains of small size, like barley and wheat. Wider space between wires creates larger openings ideal for beans and corns to pass through.
Types of Concaves
The narrow and wide wired concaves are just two types of concave net designs. There are 4 other types of concaves available and they are round bar concave, helical bar concave, slotted concave and grate finger concave. The round bar concave has no wires and hence is best for cleaning large grains while incurring minimal grain damage. The helical bar concave has bars and wires placed diagonally. It is ideal for aggressive threshing. The slotted concave has oval perforations instead of bars and wires and drastically reduces grain damage. The grate finger concave looks like a grate and provides clean grains and is also the most durable among all the concaves. All these concaves can be used individually or in conjunction with the other.
Thus, we see that the Estes concave settings should be determined by what crop you are about to harvest and in what amount. Once that are determined, it becomes easy to calculate the other aspects.