John Deere
Razors Edge Concaves
STS · S Series · X9 · Small Rotor
Will This Fit My Combine?
Razors Edge options are available for compatible John Deere STS, S Series and X9 combines. Confirm fitment before you order.
Key Benefits
How It Works
Thresh Early
The tighter, notched front section creates aggressive grain-on-grain threshing to open the crop early.
Separate Sooner
Progressively open bar spacing creates more separation area so grain can leave the crop sooner.
Unload More Evenly
Depending on the John Deere model, the spacing progresses side to side to distribute grain across the sieves.
Compatible Models
| JD STS | 9650 · 9660 · 9670 · 9760 · 9770 · 9860 · 9870 |
|---|---|
| JD Small Rotor | S550 · 9470 · 9570 · S560 · 9560 |
| JD S Series | 650 · 660 · 670 · 680 · 690 · 760 · 770 · 780 · 790 · S7 600 · S7 700 · S7 800 · S7 900 |
| JD X9 | 1000 · 1100 |
Not sure which set fits your machine? Check My Fitment →
Specifications
| Materials | Hardened steel, jig-welded and approved by Thunderstruck Ag Equipment |
|---|---|
| Compatible Combines | John Deere STS, S Series, X9 |
| Warranty | 1-Year Limited Warranty (workmanship, steel integrity, fitment) |
| Lead Time / Shipping | Most orders delivered within one week; tracking provided once shipped |
| Crop Compatibility |
BarleyCanolaChickpeasCornDurumEdible BeansFlaxHard WheatLentilsLupinsOatsPeasRiceRye GrassSesameSorghum / MiloSoybeansWheat
|
| What's Included | Model-specific concave set · Required installation hardware · Installation manual · Settings card · Warranty registration card · Combine playbook · Cover plates & cover-plate install manual |
Installation & Support
Frequently Asked Questions
Razors Edge options are available for compatible John Deere STS, S Series, and X9 combines. For fitment questions call (855) 910-2515.
They can be used across wheat, canola, barley, corn, soybeans, edible beans, and other cereals and oilseeds. Settings may need adjusting as crops and conditions change.
Razors Edge Concaves are designed to run without cover plates in most conditions. A cover plate may be used as a fallback when a specific crop or condition requires additional threshing.
Follow the model-specific installation manual and make sure the concaves are properly levelled. Product support is available if you need help during installation. Call (855) 910-2515.
John Deere settings cards are available in the support section. You can also use the Dialling In Your Combine playbook and Harvey AI once available.
Approved configurations can be purchased directly through the website, and you can also use the dealer finder to locate an authorized dealer in your area.
From John Deere Operators
The spacing allows larger-seeded crops to fall through, but it's also aggressive enough to thresh out the harder-thresh crops like durum and flax.
Our first year with the Thunderstruck Ag Concaves we were happy with what we saw. In large green lentils they did a very nice clean job with pretty much zero damage, and in durum they did probably the best job of what we were running. Canola samples were clean too — overall we were happy.
Sample quality has been no problem. Our wheat sample was on par with a competitor product running three cover plates — with no cover plates. On nine different soybean varieties our samples have been great, again running no cover plates.
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Chat With Us
Questions about fitment, settings, or an order? Our team is here to help during business hours.
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