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    Metal Folding Machines: Folding vs Roll Forming

    ZTRFM Engineering Team · Encyclopedia of Roll Forming28August 19, 2026
    A folder bends blanks. A roll former profiles coil continuously. 8 m CNC folder (~7.5/8 kW, ~125°) is not a roof mill. 3 m press brake ≤2 mm is a third crate.
    Table of Contents
    1. Blank in, fold, next bend
    2. Coil in, stands, cut
    3. Named folders and brakes
    4. When each wins
    5. Buyer FAQ
    6. Related topics

    1. Blank in, fold, next bend

    A metal folding machine clamps a sheet and flips a beam (or rams a brake punch) to a programmed angle. Each bend is a cycle. Length is the table, not a flower of 18 stands. K-style gutters can be folded this way; volume gutters are usually rolled — that fork is the gutter-folding encyclopedia.

    2. Coil in, stands, cut

    Roll forming is continuous. Station count follows the profile (tooling wiki: simple C 12–16, roofing 15–22, deck 22–30+). Speed is m/min. You do not re-program a 125° fold; you change rolls or pick another deck.

    3. Named folders and brakes

    MachineIn this catalogue
    8 m CNC folder + slitter~8000 mm; ~125°; steel ~1.5 mm (≤250 MPa); slit ~0.8 m/s; hyd ~7.5 kW / total ~8 kW; ~12 s cycle; 6 m variant exists as its own quotation
    4 m × 6 mm press-brake classRam brake, not the 8 m clamp-and-flip folder
    63T × 3200 NC brakeShort table
    200T × 4000 folder ~15 kWPaired with 6×4000 NC shear ~7.5 kW as two machines. A 4×4000 guillotine at 7.5 kW is a different shear.
    3 m hydraulic press brakePPGI/GI ≤2 mm; bend ≤3 m; red; companion 3 m shear is a separate process

    4. When each wins

    JobUsual iron
    Long flashing, ridge, custom trim, one-off guttersCNC folder / brake
    Thousands of identical C, roof, stud, fence palesRoll former
    Both in one shopTwo crates. The mill does not become a folder at slow speed

    5. Buyer FAQ

    Can the 8 m folder replace a roof mill?

    Not for coil production. It folds blanks up to ~1.5 mm steel on that tech note.

    Is a press brake a folding machine?

    In search traffic, yes. Mechanically it is a ram brake. Clamp-and-flip CNC folder is the 8 m class above.

    Does sectional-door flip-bend count?

    Those two flip-bend stations are part of a door-panel roll line (0.8–1.0 mm, ~14 stands). They are not a 3 m brake.

    Folder kW and mill kW are not interchangeable. Commercial terms come back on the offer.

    References

    • ZTRFM wiki: 8 m CNC folder; Folder vs guillotine; 4 m × 6 mm press-brake class; 63T×3200
    • Process library: 3 m press brake; Sectional door (flip-bend on a mill)
    • This batch: Gutter folding K-style
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