Used Knudson Machines for Sale
Knudson is a name commonly associated with portable roll forming machines used by roofing and gutter contractors, such as seamless gutter machines and portable roll formers for jobsite panel work. Used units appear regularly as contractors trade up or wind down their businesses. Models, ages and included tooling differ from listing to listing, so check the details of the specific machine rather than relying on the name alone.
What to verify on any used unit
- Serial plate: photograph it and use it when asking the manufacturer or a dealer about parts and history.
- Profiles included: list every profile head or roller set that comes with the machine.
- Test run: watch a full panel form and shear, ideally with your own coil.
- Rollers and shear: look for scoring, rust, chips and burrs.
- Manuals and records: ask for the operator manual and any service history.
- Parts availability: confirm parts and tooling are still offered for that model.
Start with How to Buy a Used Roll Former and the Buying a Used Seamless Gutter Machine. If you will tow the machine to jobs, see Moving & Shipping a Roll Former and browse roll former trailers.
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Questions about Knudson
Is this site affiliated with Knudson?
No. This is an independent, community-run marketplace. Knudson machines are listed by members who own them, and buyers deal directly with those sellers. The site does not inspect, guarantee, ship or finance any equipment. For factory support, parts or official specifications, contact the manufacturer or an authorized dealer directly.
Are parts still available for older Knudson machines?
It depends on the model and age. Before you buy, ask the seller for the serial number and contact the manufacturer or a parts dealer to confirm what is still supplied. Members on the community board may also know independent sources for rollers, belts and shear parts for older units.
How do I check the history of a used Knudson machine?
Ask the seller for a clear photo of the serial plate, then contact the manufacturer or an authorized dealer with that number. They may be able to confirm the model, configuration and sometimes the original build details. Also ask the seller for receipts, service records and how long they have owned the machine.