Where the S and Drive Machine Sits in a Duct Shop
The S and drive cleat machine forms the two connector profiles that join rectangular duct sections: the flat S-lock (S-slip) that slides over the flanged ends of two sections, and the drive cleat that clips the same joint. Both are transverse connectors — they hold section to section — and both are mechanical: formed, slipped on, done. No welding, no rivets, no sealant at the clip. A shop that buys its connectors formed pays a premium on every duct; a shop that forms its own pays for a machine once. The S and drive machine is the middle option of that decision: one machine, two profiles, continuous forming.
It complements the rest of the line rather than replacing it. The longitudinal Pittsburgh seam on the duct panel is formed by a lockformer such as the SA-12HB; the strip the cleats are made from is cut to width and length by a shear; the pockets the connectors engage are formed by the duct line or a TDF folder. The S and drive machine takes strip and turns it into assembly-ready connectors — and it does nothing else, which is exactly why it is worth buying.
S and Drive Machine Specification
| Parameter | S and Drive Cleat Machine |
|---|---|
| Role | Continuous roll forming of S-slip and drive cleat profiles |
| Profiles | Flat S-lock (S-slip) + drive cleat |
| Material thickness | 0.5–1.2 mm galvanized (about 24–18 ga) |
| Forming speed | 12 m/min (the factory data sheet for the SA-12S family lists a 1–23 m/min production capacity — build dependent) |
| Drive power | 1.1 kW (factory data sheet lists 2.2 kW on the SA-12S frame — confirm the build being quoted) |
| Forming head | Multi-station; the classic S and drive design is an eight-station head with inboard operation and at least two empty outboard rolls for roll-set profiling |
| Rollers | Hardened alloy steel forming rolls on ground shafts, driven through matching cut gears and needle bearings (factory description) |
| Machine weight | About 280 kg (export listing) to 350 kg (factory data sheet) — configuration dependent |
| Frame | Welded steel, stand-mounted with feeding guide; 1490 × 630 × 1000 mm on the SA-12S data sheet |
| Control | PLC with touchscreen |
| Certification / warranty | CE / 2 years (factory states 24 months from arrival) |
| Commercial terms | 20% TT with order, 80% balance before shipment; about 5 days lead time on stocked builds |
| Typical price | About USD 4,200 FOB for the combined S and drive build; the dedicated S-cleat former SA-12S lists around USD 3,100 |
Two reading rules. First, where the export listing and the factory data sheet disagree — drive power at 1.1 kW against 2.2 kW, weight at 280 against 350 kg — the difference is configuration, not contradiction: the combined S and drive build and the dedicated S-cleat build are different machines sharing a model family, and listings for each circulate under overlapping names. Get the data sheet of the exact build in writing. Second, the station count is the number that predicts profile quality: bends spread across eight stations deform the coating gently and form heavy gauge without cracking the zinc, where a two- or three-station head forces the same profile in fewer, harder hits.
Forming Principle: Rolls, Not Presses
The machine is a roll former. Strip feeds in against adjustable fences, passes through successive roller stations that each bend the profile a few degrees further, and exits formed. Three properties follow from that, and they explain the price gap over bending the same profiles on a brake:
Gentle deformation, better coating survival
Galvanized coil cracks at the bend when the deformation is sudden. Progressive forming across multiple stations keeps each bend small, so the zinc layer survives at the top of the gauge range — the difference between a cleat that assembles and a cleat with a hairline crack that fails on site.
Continuous rate, not cycle time
At 12 m/min a 1.2 m strip forms in about six seconds of machine time. Feeding and stacking, not the head, set your actual rate — so plan the bench, the infeed table, and the output rack around handling, and do not pay for speed the layout cannot use.
Quick change between profiles
The classic design forms the flat S-lock inboard with the drive cleat on one side and a third profile opposite, keeping at least two outboard rolls empty so roll sets can be swapped without stripping the head. The practical consequence: changing from S-slips to drive cleats is a mechanical changeover measured in minutes, not a re-programming exercise — but it is still a changeover, and it deserves its own setting card at the machine.
Roll Tooling: What to Ask For in Writing
The rolls are the wear parts. The factory describes hardened alloy steel forming rolls on ground shafts, driven through matching cut gears and needle bearings — a description you cannot verify at the receiving dock. Ask for the roll material and hardness in writing, together with the regrind service, regrind turnaround, and the price of a replacement roll set. Over five years those terms matter more than any feature on the spec sheet, and a spare roll set in stock is what turns a wear event into a scheduled change instead of a line stop.
S and Drive vs SA-12S vs CB-700 vs Pan Brake
| Machine | Profiles | Cycle | Power | Price band |
|---|---|---|---|---|
| S and drive machine (this machine) | S-slip + drive cleat | Continuous, 12 m/min | 1.1 kW | ~USD 4,200 |
| S-cleat former SA-12S | S-slip only | Continuous, 12 m/min | 1.1 kW | ~USD 3,100 |
| Drive cleat bender CB-700 | Drive cleat only | Bend cycle, 5–10 s per bend | 0.55 kW | ~USD 1,300 |
| Pan brake 2500 mm | General straight folding | Re-set per job | Operator-dependent | Mid |
The decision is a volume-and-mix question, not a features question. Both profiles every week means the combined machine. One profile in volume means the dedicated former is faster per piece. One profile occasionally means the brake, with the changeover cost priced in. The factory page for the SA-12S family adds one more option worth knowing about: that frame is documented as capable of four lock shapes — S cleat, C cleat, Pittsburgh lock, and claw cleat — so if your cleat system is unusual, ask which roll sets are included in the quotation before assuming you need a different machine.
Which Cleat System Are You Actually Running?
Cleat profiles vary by region and by customer specification, and this is the question that decides whether any of these machines will work for you: a machine bought for the wrong system produces cleats that look right and do not assemble, and that fault reaches site — the most expensive place to find it. Before committing to tooling, get the specification or a physical sample of the connector profile your customers use, and dry-fit machine-formed cleats against a mating duct section before releasing the first batch.
Setup and Acceptance Checklist
- Profile confirmed against a customer sample or written specification before the first batch.
- Trial on micrometer-verified scrap of every gauge and material you run — galvanized, stainless, aluminum.
- Separate setting cards at the machine for the S-slip and drive cleat profiles.
- Positive length stop fitted; every piece seated against it; weekly stop check.
- Strip width measured on the first piece of every new coil; supplier and width recorded together.
- Cut ends deburred before forming; shear blade condition inspected.
- Monthly dry-fit against a mating section — the only reliable profile check.
- Every adjustment locked and marked so drift is visible at a glance.
- CE documentation, 24-month warranty terms, and spare roll set availability confirmed before the balance payment.
Common Faults and What They Actually Mean
Cleat faults are nearly always the wrong profile for the system, strip width, or tooling wear. All three are checkable at the bench.
| Symptom | Most likely cause | What to do |
|---|---|---|
| Cleat will not assemble with the mating section | Wrong profile for the system | Confirm the profile against a customer sample; get the specification in writing at order stage |
| Fit varies between coils | Strip width variation | Measure the first piece of each coil; a purchasing issue as much as a machine issue — speak to the supplier |
| Cleat length inconsistent | No positive stop | Fit a positive stop and require every piece against it; check the stop weekly |
| Burr prevents seating | Cut ends not deburred | Deburr before forming; check the shear blade — a worn blade is usually the root cause |
| Profile drifts over months | Tooling wear | Dry-fit monthly and replace tooling on measurable drift; keep a spare set |
| Machine jams on thicker stock | Material above the tooling specification | Verify thickness with a micrometer; never force thicker stock through the rolls |
FAQ
Do we still need a seam closer if we have this machine?
Yes — they close different joints. This machine forms the transverse connectors that hold section to section; the longitudinal Pittsburgh seam on the duct panel is formed and closed by a lockformer or a dedicated seam locker. A complete rectangular duct line needs both, and buying one instead of the other leaves half the joint uncovered.
Can it form the Pittsburgh lock as well?
The dedicated S and drive build is specified for the S-slip and drive cleat profiles. The factory data sheet for the SA-12S family — the frame this class of machine descends from — documents four lock shapes including the Pittsburgh lock and claw cleat, so if you need the longitudinal seam on the same machine, ask which roll sets are included and whether the frame being quoted carries them.
What gauge can it form?
0.5–1.2 mm galvanized steel, about 24 ga to 18 ga. Stainless and aluminum run within the same range with their own recorded settings; aluminum marks more readily and stainless work-hardens at the bend, so tooling condition matters more, not less.
How many connectors per hour should we expect?
At 12 m/min a 1.2 m strip forms in roughly six seconds of machine time, so the head is never the constraint — feeding, cutting, and stacking are. Plan the layout around handling, and remember that cleats still have to be cut to width and length upstream, by a shear whose blade condition decides whether they seat.
One combined machine or two dedicated formers?
Floor space and changeover against per-piece speed. The combined machine covers both profiles on one stand and changes between them in minutes; two dedicated formers are faster per piece on a single profile but cost more, take more floor, and each becomes a single point of failure. Most shops land on the combined machine unless one profile clearly dominates volume.