The Feeding Auger Assembly is one of the highest-workload components in a combine harvester. All crop cut on the header must first pass through the feeding auger before it can be conveyed into the threshing system. A tracked combine harvester’s feeding auger assembly has approximately 106 parts, from the main body, crop-contact components, drive and lubrication, floating tensioning mechanism to hardware. Let’s take a comprehensive look at this harvester assembly with Maikeyier!
What is a Feeding Auger Assembly?
The feeding auger is a large rotating screw conveyor located at the rear of the combine header, between the cutter bar and the feeder house. Its task is simple but critical: gather the crop cut across the full width of the header, convey it laterally to the center, and feed it evenly into the threshing drum.
Auger weldment tube: The rotating main body that conveys the crop.
Retractable finger bar: Extends beyond the auger surface to grab short straw or lodged crop and pull it in.
Drive and bearing system: Spherical plain bearing, bearing housing, eccentric adjustment shaft.
Floating and tensioning mechanism: Floating slider, tension bolt, spring, adjustment block — allows the auger to “float” and yield when crop load suddenly increases.
Anti-wrapping components: Stainless steel anti-wrapping flights to prevent crop from wrapping around the shaft end.
Auger Assembly Parts Breakdown
The harvester feeding auger assembly includes the main body and its components, plus more than 30 fasteners of different specifications such as bolts and washers.
Core Auger Body
| Name | Quantity |
| Feeding Auger Assembly | 1 |
| Auger Assembly | 1 |
| Auger Weldment (Tube) | 1 |
Crop-Contact Components: Retractable Finger Bar, Finger Seat, and Finger Guide Wheel
| Name | Quantity | Description |
| Retractable Finger Bar | 1 | Prone to bending and deformation |
| Finger Seat | 1 | |
| Finger Guide Wheel | 15 | Typical high-wear part; friction with the finger bar on every revolution |
| Stainless Steel Anti-Wrapping Flight | 1 | Prevents straw wrapping at shaft end |
Drive, Bearings, and Lubrication
| Name | Quantity |
| Spherical Plain Bearing | 1 |
| Spherical Plain Bearing Housing | 1 |
| Eccentric Adjustment Shaft | 1 |
| Connector-Type Grease Nipple | 1 |
Floating and Tensioning Mechanism
| Name | Quantity |
| Floating Slider | 1 |
| Tension Bolt | 1 |
| Spring | 1 |
| Adjustment Block | 1 |
How Does the Feeding Auger Work?
Crop entry: Crop cut by the header falls from the reel and spreads across the full header width onto the auger floor plate.
Center conveying: Two spiral flights with opposite rotation directions convey the crop laterally to the center of the auger.
Finger grabbing and pressing down: The retractable finger bars extend to press short straw or tangled crop into the feeder house.
Even feeding into threshing: Crop enters the threshing drum in an even mat — feeding uniformity is the biggest factor determining threshing quality and grain loss rate.
Floating overload absorption: When crop flow suddenly increases, the floating mechanism lifts the auger to pass the peak and prevent blockage.
Common Wear Points and Troubleshooting
| Wear Part / Fault | Symptom | Inspection and Replacement |
| Finger guide wheel | Finger bar wobbles; metal shavings on auger floor plate | Replace guide wheel; check finger bar wear |
| Retractable finger bar | Finger bar bent; poor short-straw feeding | Replace finger bar and finger seat |
| Spherical plain bearing | Vibration and abnormal noise; grease loss | Replace bearing and bearing housing; re-grease |
| Flight edge wear | Feeding slows; crop floats above the auger | Repair or replace auger weldment |
| Floating mechanism failure | Impact noise; header blockage with large crop slugs | Check spring and floating slider |
| Shaft end wrapping | Wet straw wrapped around shaft end | Check stainless steel anti-wrapping flight |
Four Core Augers on a Harvester
Across the harvester’s various systems, there are the feeding auger, grain auger, and tailings auger. They look similar but convey completely different materials, are located in different positions, and have different structures. If you need to replace an auger, be sure to provide the exact assembly name and part number.
| Auger Type | Installation Position | Conveyed Material | Core Function |
| Feeding Auger | Rear of header, front of feeder house | Freshly cut whole crop (rice, wheat) | Gathers crop and feeds evenly into threshing drum |
| Grain Horizontal Auger | Bottom of cleaning sieve box, bottom of grain tank | Clean grain | Collects grain falling through the sieve and conveys it laterally to the elevator end |
| Grain Vertical Auger | Rear side of machine (inside elevator) | Clean grain | Lifts grain vertically from the bottom to the grain tank at the top |
| Tailings Vertical Auger | Rear of threshing and cleaning system (inside tailings elevator) | Unthreshed heads, short straw, chaff mixture | Lifts tailings discharged from the sieve surface back to the threshing drum for “secondary re-threshing” |
Why Choose Maikeyier?
Maikeyier is an agricultural parts factory supplier from China, providing complete machine parts solutions to agricultural machinery customers worldwide, especially harvester and tractor wholesalers and dealers.
Forging factory: Key wear-resistant parts in the cutting and feeding systems (such as sprockets, shafts, and high-strength connectors) are produced by our own factory.
Full system coverage: Auger parts, feed chains, sprockets, bearings, springs, oil seals, and fasteners — unified procurement, quality inspection, and consolidated container shipment.
Precise matching by part number: We maintain parts catalogs for mainstream brands such as Kubota, Yanmar, Lovol, and World to avoid costly wrong purchases.
Export-grade packaging: Packed by part number, anti-rust treated for sea freight, and mixed with other parts in the same container to help you save on freight.
Whether you need a complete feeding auger assembly or the wear parts behind it — finger bars, finger guide wheels, bearings, springs — Maikeyier can match by your original part number, quote quickly, and consolidate all parts into one container for shipment. Contact us now with your harvester model and part number to get a fast quotation!