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Is a C&U Combined Keel Machine the Same as Separate C Stud and U Track Machines?
Table of Contents
1. Short answer
Not the same setup. A combined line makes both C studs and U tracks on one mill with changeover (or dual-line designs). Separate C stud and U track lines each dedicate to one profile. Partition projects need both product types either way — the choice is capacity and changeover tolerance, not “one name fits all.”
2. Side-by-side
| Item | CU combined | Separate C + separate U |
|---|---|---|
| Output | C and U on one frame (changeover) | Dedicated C mill + dedicated U mill |
| Documented speed (examples) | About 0–20 m/min (recommended EN); other schemes ~10–25 | C stud ~15–20; U track ~20–25 m/min on their references |
| Power examples | About 5.5 / 5.5 kW recommended; heavy CU ~15 kW separate tier | C ~5.5/5.5; U main ~4 kW (U hydraulic kW not unified in that FAQ — do not invent) |
| Stations / shaft (examples) | ~14 stands / φ50 on recommended EN; stud-and-track variant ~11 stands | C ~12–14 / φ50; U ~9–12 / φ40 |
| Changeover | Required for C↔U (stud-and-track variant ~15–20 min class) | No C↔U changeover; each line stays on one profile |
| Floor / capital | One footprint for both profiles | Two footprints; parallel production possible |
Self-check: Do not paste structural U-channel (~2–3 mm) numbers onto either light-gauge path.
3. CU tier caution
Combined packages themselves have tiers. A recommended light-gauge CU partition reference (about 5.5 / 5.5 kW, thickness about 0.5–1.0 mm) is not the same sheet as a heavier combined light-keel variant (about 15 kW main, shaft about φ80, thickness band up to about 2.5 mm on that source). Keep those tiers labeled separately.
4. How to choose
- High mix, limited space → combined CU
- High volume of both profiles, minimal changeover → two dedicated lines (or a dual-line combined design)
- Always send both C and U drawings
- If only one profile is needed forever, buy the dedicated mill — do not pay for unused C↔U changeover
5. Boundaries
- Villa LGS frame lines are a different thickness / punch class
- Furring / hat / omega are secondary profiles — not CU stud-track
- Structural C/Z purlin or heavy U-channel parameters do not belong here
6. Inquiry checklist
- Both C and U drawings (or confirm single-profile forever)
- Combined vs two dedicated lines preference
- Expected changeover frequency and batch size
- Thickness band and whether a heavy CU tier is in scope
- Punch requirements on C and/or U
7. Buyer FAQ
Does “CU” mean structural channel?
No — here it means light-gauge stud + track for gypsum partitions.
Is combined always cheaper than two lines?
Not as a public encyclopedia claim. Compare footprints, changeover downtime, and named proposals — commercial quotes are out of scope here.
Can I copy C stud 5.5/5.5 kW onto a track-only quote?
No. Dedicated U track often lists forming main about 4 kW, and hydraulic kW may be listed separately or left open.
How long is C↔U changeover?
One stud-and-track variant cites about 15–20 minutes class — confirm the procedure on the proposal.
Final ratings follow the named combined or separate proposals. Price and lead time are out of scope.