Field Performance Report December 31, 2025 | John Deere 2025 Evaluation

During the 2025 harvest season, a focused performance review was conducted on Razors Edge Concaves operating in John Deere STS and S-Series combines across multiple regions and crop types.

Following post-harvest reviews with producers, the feedback showed remarkable consistency regardless of geography, crops, or machine model. Operators reported measurable gains in capacity, reduced loss, improved grain quality, and simplified seasonal setup compared to factory concaves and other aftermarket alternatives.

The following report summarizes verified field observations and average operating parameters collected throughout the season.

1. Throughput & Capacity

Across nearly all crop categories, operators reported the ability to increase ground speed without elevating loss levels.

In multiple side-by-side comparisons within the same field, Razors Edge-equipped machines consistently harvested more acres per day than comparable machines running OEM concaves.

Producers noted:

• Running the concave spacing wider
• Reduced rotor speed
• More even distribution of material on the sieves

2. Grain Loss Control

Loss monitoring was a major focus of our producers’ testing. The overwhelming consensus indicated a measurable drop in total grain loss, particularly rotor loss in cereals and corn. Several producers estimated reductions in overall loss ranging from 25% to 50% compared to previous concave setups, even while pushing machines harder.

Notably, operators did not need to sacrifice capacity to protect sample quality or control tailings volume.

3. Grain Sample & Damage Reduction

Clean tank samples were one of the most consistent points of feedback.

Operators observed:

• Fewer white caps in spring wheat
• Lower split counts in peas
• Reduced cracking in soybeans
• Minimal unthreshed pods or heads
• Reduced MOG in corn sample

Many producers commented that they were achieving a cleaner sample with less grain damage while running higher throughput than in previous seasons.

4. Fuel Efficiency

Despite operating at higher ground speeds, producers reported reduced fuel consumption per acre.

The most common explanation cited was using less horsepower with a wider concave spacing and slower rotor speed.

Several operators estimated fuel savings in the 20–30% range compared to their previous concave configurations.

5. Operational Simplicity

A key advantage noted was reduced seasonal adjustment.

The operators:

• Did not change concave modules during the season
• Did not install cover plates
• Required only setting changes between crop transitions

Once baseline settings were established, most machines ran consistently across changing field conditions with minimal settings changes.

Based on consolidated field feedback, the Razors Edge Concaves system demonstrated the following advantages in John Deere STS and S-Series combines

Producer satisfaction levels were high, with a significant number of operators indicating plans to continue use in 2026, with most outfitting the rest of their fleet.