This FARM TUFF® heavy-duty vertical unload auger is built for high-output John Deere® combines where speed, durability, and grain protection matter most. With a 15.25" left-hand flighting diameter, 10.5 pitch, and precision-balanced design, it delivers smooth unloading and reduces vibration under load—especially in STS combines with high unloading rates.
Crafted from 0.25"-thick 1020 HR steel, this auger features cupped Super-Edge™ helicoid flighting with an edge that’s 30–50% thicker in high-wear areas. Edges are hard surfaced with Lincore® 33 weld wire, achieving a Rockwell hardness of 45–50 for serious resistance to wear and impact. Shaft input options include 4.063"-25 and 4.063"-20 internal splines to fit multiple John Deere® drive systems.
The result? Fewer broken kernels, reduced fines, and minimized dockage—so your grain grades higher and brings a better return. Whether you’re running a 9660STS, 9670STS, 9760STS, 9770STS, 9860STS, or 9870STS, this unload auger is ready to replace worn factory units with a stronger, longer-lasting option that gets your crop out clean and fast.
FARM TUFF® combine augers are proudly American-made and engineered for full-season endurance in real farm conditions—not just spec sheets. Built for operators who know that uptime and grain quality are non-negotiable.
As a family-owned company, Abilene Machine has been providing farmers with dependable agricultural replacement parts for over 40 years. Whether you need to make a repair or perform scheduled maintenance, you can depend on us to help keep your equipment in great working condition. And if you have any questions, please do not hesitate to contact our knowledgeable sales staff. We have over 100 years of combined ag parts sales experience to assist you.
Warranty Info
Abilene Machine, LLC offers a standard 1-year warranty on all new, used and remanufactured parts. Abilene Machine reserves the right to inspect any or all parts returned for warranty before warranty claims will be honored. In all instances, Abilene Machine's sole liability will be either replacing the defective part or a refund not to exceed the purchase price of the defective part.
