John Deere® Compatible Bisalloy Frame 31-Wire Concave
Experience high-performance threshing with this premium C&M Australian-made small wire concave. Specifically engineered for John Deere® STS and S-Series combine harvesters, this concave is manufactured in our Griffith factory from premium-grade materials to ensure maximum service life and superior crop separation.
The frame is precision laser-cut from 6mm Bisalloy 400 extended wear plate, providing a high-strength foundation that keeps its edge and resists wear under high mechanical loads. The threshing surface utilizes T304 stainless steel small wires in a 31-wire high-density layout, offering exceptional extended wear and preventing separation degradation. This combination of high-performance materials ensures your product feeding and threshing system stays in top condition through multiple high-capacity harvests.
John Deere® OEM Cross-Reference
Replaces OEM Part Numbers: AXE28958 (Current), AH205255 (Legacy)
31-Wire Concave Compatibility: John Deere STS & S-Series
| Series |
Models |
Reference |
| John Deere® STS Series |
9750, 9660, 9760, 9860, 9670, 9770, 9870, 9880 |
Standard Fitment |
| John Deere® S6 Series |
S650, S660, S670, S680, S690 |
Standard Fitment |
| John Deere® S7 Series |
S760, S770, S780, S790, S7 600–S7 900 |
Standard Fitment |
Technical Specifications & Features
- Manufacturer: Proudly C&M Australian made by Collier & Miller.
- Frame Material: 6mm Bisalloy 400 for superior abrasion resistance.
- Wire Specification: T304 Stainless Steel small wires in a precise 31-wire configuration.
- Wear Rating: Extended wear configuration designed for high-capacity small grain threshing.
- Versatility: Suitable for Position 1, 2, or 3 (Position 1 requires bolt-on ramp lip).
- Finish: Professional powder-coated finish for additional protection.
- Dispatch: Available for fast Australia-wide shipping from Collier & Miller.
Expert Maintenance Review
The 31-wire small wire concave is primarily utilized for threshing smaller grains where intensive, aggressive threshing is required to separate the kernel from the head. While normally set up and optimized for **Positions 2 and 3**, the modular design of this C&M unit allows it to adapt to different threshing setups across the front cone. We recommend inspecting the wires for abrasion thinning, checking the spacing consistency, and assessing frame squareness during every preventative maintenance check.
Upgrading to this Bisalloy and Stainless solution is a strategic choice to save money over the life of the machine. The stainless steel wires maintain a polished, low-friction surface that resists off-season rust pitting, ensuring your threshing system remains in top condition from the very first acre of the season and providing a significantly longer service life than standard carbon steel concaves.
Installation Tip: Position 1 Setup
When installing this concave in Position 1, ensure you also fit the required bolt-on ramp lip to facilitate a smooth transition from the feeder house floor. Using new high-tensile mounting hardware is essential to maintain a high-strength, vibration-free threshing environment. A precision-aligned concave is vital for maintaining high-speed harvesting capacity.