Knife Roller

Replace the knife roller on your John Deere® 643 harvester’s corn head with our selection of parts and components below. Worthington Ag Parts has the aftermarket new, used, and rebuilt harvester parts you need at an affordable price. All of our parts sold are covered under a 30-day no questions asked return policy and 1-year limited warranty.

Our inventory of components is constantly changing as we buy and sell equipment. Find the specific part you need by entering the model or part number into our search bar. If you are still having trouble finding what you need, please reach out to our highly trained staff. They can help you sort through our inventory as well as make recommendations for your specific machine. Give our team a call at 888-845-8456 to get the help you need to get your harvester back to work.