Conventional Concaves
Harvest Services Conventional Combine Concaves are a serious improvement over its OEM counterpart. Robust build design, significantly more material above the bars, completely precision line bored and quality materials all add up to improved performance in this critical most component of your combine. Additional filler plates or cover plates for various crops and crop conditions are optional.
Why the Harvest Services Conventional Concaves works so well:
With Harvest Services Precision Bored Concaves, the entire concave fits the cylinder allowing the entire concave to be used for threshing and separating. They start out as a precision concave and because they are stronger, they keep their shape and remain a precision part. This is especially important when harvesting crops with straw or smaller seeds. One high bar is enough to significantly increase walker loss, white caps and cracked kernels. There are no high bars on a Harvest Conventional Concave.
With the Harvest Services Conventional Concaves, the threshing area, or the first third of the concave, is covered with Filler Plates. The separation area of the concave, the back two-thirds, is open to allow the grain to fall through. Filler Plates allow you to fine tune your concave to obtain maximum threshing and separating performance. Adding or removing Filler Plates is a simple operation that typically takes about five minutes with the concave in place. Filler Plates hold the heads in the wedge between the concave and the cylinder so they can be threshed completely and not pushed through the concave and onto the shoe or walker in the form of unthreshed heads. Without Filler Plates, white caps and unthreshed heads are knocked through the front third of the concave and threshing is done by the impact of the cylinder bars striking the heads and not by gentle rubbing.
Threshing cereal grains properly requires more bar above the Filler Plates. The wires have to be placed deep enough to allow a minimum of 3/8″ of bar above the Filler Plates to form a deep enough pocket to hold the heads long enough for the cylinder bars to rub the seeds out of the head.
Rotary Concaves
Wide Wire, Narrow Wire, and Round Bar Harvest Services Rotary Concaves provide the ultimate combine configurations for optimal threshing and grain separation. To tackle high capacity and high wear factors in rotary combines, Harvest wire concaves are manufactured using 1045 steel with more steel bar over the wire. They are more aggressive and last longer. Side frames, hooks and wire diameters are also heavier, so they last longer and keep their shape. Cover plates for various crops and crop conditions are optional.
Why the Harvest Services Rotary Concaves works so well:
Harvest Concaves are precision bored so they fit better and are easier to properly adjust.
The wire holes are drilled with state of the art, computer controlled, multiple head drills. This ensures the precision alignment of holes, and a snug wire fit. With a Harvest precision-built Concave there’s no wire-to-hole gap to trap straw.
Rotary combines are achieving very high capacities. Along with higher capacities, rotary combines tend to have higher wear factors. To help control maintenance costs Harvest wire concaves are manufactured using 1045 steel and have more steel bar over the wire. They are more aggressive and last longer. Side frames, hooks and wire diameters are also heavier, so they last longer and keep their shape.
To allow for threshing and separation in a variety of crops Harvest manufactures wide wire concaves, narrow wire concaves or any combination.
In addition, Harvest manufactures round bar concaves for popcorn, high moisture corn and specialty crops. Rather than wires the concave has 1018 ¾” steel bars. Since the round bar is less aggressive than the square bar of the wire concave, the kernel is treated gentler.
At times with insufficient material, the rotor typically drives heads through the concave before they are threshed. This leads to unthreshed heads that overload the return, end up in the tank as dirty sample or become loss out the back of the combine. Material must be retained at the front of the concave to hold the heads in place long enough to thresh the seeds out of the head. With Harvest concaves you can increase your threshing capacity, hold those heads in for proper material on material thresh and eliminate white caps and cracking.
This Rotary Concave allows for a variety of combine configurations to provide optimal threshing and grain separation. It is made with 1045 steel to help tackle high capacity and wear factors typical in rotary combines.
• Precision bored for easy adjustments and perfect fits. No wire-to-hole gap that would trap straw
• Heavy side frames, hooks, and wire diameters
• Available in a variety of configurations suited for many different types of crops, including small grains, sunflowers, corn, soybeans, and peas
Works with these models:
JOHN DEERE
• X9 1000, X9 1100
Features
Heavier Build
All Harvest Services Combine Concaves are built to last. Thicker bars, heavier wire and robust design translates into an exceptional longer lasting product compared to OEM and our competitors.
Wire Configurations
Harvest Services Concaves come in Wide Wire, Narrow Wire, and Round Bar (Rotary only) to provide optimal threshing performance for your particular crop and crop condition needs. Our concaves are designed to maximize productivity and minimize waste, giving you the most efficient harvest possible.
Precision Line-Bored
Harvest Services Concaves are precisely bored to a perfect circle making for truer tolerances and easier setup of Cylinder-to-Concave clearance resulting in better grain retention with less white caps and shattering. Precision Line Boring results in a serrated bar edge for better retention of material, resulting in perfect head on head thresh.
More Bar Over the Wires
Our concaves are designed with more bar material above the wires resulting in a longer wearing component. In addition, the Precision Line Boring results in a serrated bar edge allowing for better material on material contact in the threshing operation. Better contact equals more grain in the hopper.
