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Gutter Folding Machines: K-Style
1. Fold vs roll: two ways to get a K
A K-style (ogee) eaves trough is an open channel with a front bead and a back hanger flange. High-volume plants roll-form it from coil. Roofing shops that already own a long folder often fold custom lengths from slit blanks — same silhouette, different machine class.
Search “folding machines gutters” lands on both. The gutter-type wiki already splits half-round vs rain vs box. This page only answers: mill or folder.
2. The rain / K-style roll mill
Documented rain-gutter family (eaves trough, K-style class): about 10–12 m/min, main about 4.0 kW plus hyd about 3.0 kW, shaft about φ70, about 18 passes, thickness about 0.3–0.7 mm. Half-round 6-inch is a slower neighbour (~3–8 m/min, ~5.5 + 3 kW, φ50). Box ratings stay on the box-gutter proposal.
A named combo crate is gutter RFM + downpipe RFM + bending/necking unit: material 0.3–0.8 mm, feed width 312 mm, 3 t manual decoiler, 380 V/60 Hz. The downpipe on that sheet is 22 stations, Ø75, 20 m/min, 7.5 kW main, 5.5 kW hyd. Those downpipe numbers are not the gutter flower.
That is continuous coil profiling. It is not a clamp-and-flip folder.
3. Long CNC folder (blank work)
An 8 m CNC folder with slitter (wiki tech note): fold length ~8000 mm, max angle ~125°, steel ~1.5 mm (yield ≤250 MPa), Al ~2.0 mm, SS ~1.0 mm, slit ~0.8 m/s, hyd ~7.5 kW, total ~8 kW, mass ~4500 kg. Cycle ~12 s. 6 m quotations exist in the same pack — 6 m and 8 m stay on their own quotations.
Public use of that class is long trim, flashing, ridge, and similar sheet work. A shop can fold K-style segments on it if the blank width and flange recipe fit. Throughput is piece-by-piece, not 10–12 m/min of coil.
A portable jobsite “K-style folding machine” kW is not a published ZTRFM rating. If the inquiry is a North-American truck-bed portable, quote from that drawing — this folder page is the 8 m shop unit.
4. Press brake and shear are still not a mill
- 4 m × 6 mm press-brake class — different mechanism
- 63T × 3200 NC brake — short table
- 200T × 4000 folder ~15 kW vs 6×4000 NC shear ~7.5 kW — folder vs guillotine wiki; often bought as a pair, still two machines
- 3 m hydraulic press brake (process library) for PPGI/GI ≤2 mm — companion 3 m shear is a separate process
5. Which crate for which job
| Need | Usual ask |
|---|---|
| Pallets of one K-style from coil | Rain-gutter roll mill; send the trough drawing |
| Custom long flashings + occasional gutter segments | CNC folder/slitter; name 6 m vs 8 m |
| Half-round architectural | Half-round host, not the K mill and not the folder kW |
| Box / square commercial | Box proposal — rain-gutter numbers stay on the rain mill |
| Covers / elbows | Other encyclopedias in this batch |
6. Buyer FAQ
Is a K-style gutter a folded product or a roll-formed product?
Both exist. Volume coil work is roll forming. Folder work is blanks and changeable recipes.
Can I use the 8 m folder’s 7.5 kW as the rain mill hydraulic?
No. Rain hyd on the type table is about 3 kW. The folder 7.5 kW is the clamp-and-flip pack.
Will the combo 20 m/min downpipe speed apply to the K gutter?
No. That 20 m/min is the downpipe host on the combo sheet.
Do I fold then roll?
Pick one process for the trough. A folder does not replace the last stands of a gutter mill.
Rain-gutter bands, combo 312 mm / 380 V/60 Hz, and 8 m folder ratings are three labeled sources. Commercial terms come back on the offer.
References
- ZTRFM wiki: Round vs Rain vs Box Gutter
- ZTRFM wiki: 8 m CNC Folder with Slitter; Folder vs Guillotine Shear
- Process library: Gutter + downpipe combo; 3 m press brake (boundary)