Airtac SCT80~100 Multi-Position Tandem Cylinder SCT80X15X40S
The AirTAC Airtac SCT80~100 Multi-Position Tandem Cylinder SCT80X15X40S is a genuine double-acting MULTI-POSITION (tandem) air cylinder: two piston sections of 15mm and 40mm give 4 controllable stop positions across a 55mm total travel, with a Ø80mm bore, PT3/8 ports and adjustable end cushioning.
- BoreØ80 mm
- Stroke 115 mm
- Stroke 240 mm
- Total travel55 mm
- Positions4 stops
- Port sizePT3/8
About the Airtac SCT80~100 Multi-Position Tandem Cylinder SCT80X15X40S
The SCT80X15X40S is a tandem multi-position cylinder that delivers four discrete rod stops from two independent piston sections on a common 25 mm rod. With strokes of 15 mm and 40 mm, the reachable positions are 0 mm, 15 mm, 40 mm, and the full 55 mm total travel, selected by pressurising one or both sections. The built-in magnet lets CMSG, DMSG, or EMSG sensors clamp directly to the tie-rod barrel for end-of-stroke or mid-position confirmation.
Each 80 mm bore section generates 2513 N of push force at 0.5 MPa, rising to 4523 N at the maximum operating pressure of 0.9 MPa. The cylinder body has an A-length of 296 mm and uses PT3/8 ports with a 28 mm adjustable air cushion at each end. This model suits compact multi-stop tasks where electronic position feedback is required without adding external brackets.
Airtac SCT80~100 Multi-Position Tandem Cylinder SCT80X15X40S Technical Specifications
| Model | Airtac SCT80~100 Multi-Position Tandem Cylinder SCT80X15X40S |
|---|---|
| Series | SCT multi-position tie-rod cylinder |
| Bore size | Ø80 mm |
| Stroke 1 / Stroke 2 | 15 / 40 mm |
| Total travel | 55 mm |
| Stop positions | 4 positions |
| Acting type | Double acting (tandem, multi-position) |
| Port size | PT3/8 |
| Rod thread | M20×1.5 |
| Fluid | Air (filtered by 40µm element) |
|---|---|
| Operating pressure | 0.15 – 1.0 MPa |
| Proof pressure | 1.5 MPa |
| Temperature | -20 to +70 °C |
| Speed range | 30 – 800 mm/s |
| Cushion | Adjustable, 28 mm |
| Max stroke / section | Up to 500 mm standard |
Specifications follow the official AirTAC SCT (multi-position) datasheet. SCT is available in bores 32–100; each of the two sections has a 500 mm max standard stroke (800 mm max). Confirm against the product label before installation. Thread options: PT (standard) / G.
Stop Positions (4)
| Position | Rod extension |
|---|---|
| P0 (retracted) | 0 mm |
| P1 (section 1) | 15 mm |
| P2 (section 2) | 40 mm |
| P3 (both extended) | 55 mm |
Positions are set by pressurising section 1, section 2, or both. With equal strokes you get 3 distinct positions; with unequal strokes you get 4.
Theoretical Output Force (Ø80mm)
| Pressure | Push force | Pull force |
|---|---|---|
| 0.5 MPa | 2513 N | 2268 N |
| 0.7 MPa | 3519 N | — |
| Max (@1.0 MPa) | 513 kgf | |
Force is per actuated piston section (single-piston, same as the SC bore): push uses the full bore area, pull subtracts the rod area. Size with a safety margin.
Model Code: Airtac SCT80~100 Multi-Position Tandem Cylinder SCT80X15X40S
| SCT | Multi-position (tandem) tie-rod cylinder series. |
|---|---|
| 80 | Bore size in mm (SCT range 32–100). |
| ×15 | Stroke 1 (section 1) in mm. |
| ×40 | Stroke 2 (section 2) in mm. |
| -S | Optional built-in magnet for sensor position sensing. |
Related types: SC (single rod), SCD (double rod), SCJ (adjustable stroke). SCT mounting: Basic, FA, FB, CA, CB, LB. Seals: TPU standard / H = Viton / N = NBR. Thread: blank = PT, G = G thread.
Where the Airtac SCT80~100 Multi-Position Tandem Cylinder SCT80X15X40S Is Used
Two-Stage Diverter Gate
The 15 mm stroke shifts a small diverter flap for a bypass lane, while the 40 mm stroke fully opens the main product path. The four positions give a closed, bypass, main, and combined-flow state in one compact unit.
Multi-Depth Label Press
Apply light tack pressure at the 15 mm stop and full bonding pressure at the 55 mm extended position. The intermediate 40 mm stop provides a third force level for different label materials, all from one cylinder.
Sensor-Controlled Part Staging
The built-in magnet allows CMSG sensors to detect the 15 mm and 40 mm positions, triggering a robot pick at the mid-stroke and a reject blow-off at full extension. No external flag sensors are needed.
Is the Airtac SCT80~100 Multi-Position Tandem Cylinder SCT80X15X40S the Right Cylinder?
Choose the SCT80X15X40S when a single actuator must reach two intermediate positions plus the fully retracted and extended stops, avoiding the complexity of two separate cylinders and external hard stops. If the 2513 N per-section push force at 0.5 MPa is more than needed, stepping down to a 63 mm bore reduces the force to 1559 N per section while keeping the same multi-position logic. For replacement, match an AirTAC SCT with an 80 mm bore, 15 mm and 40 mm section strokes, PT3/8 ports, and the -S magnet suffix; the basic mounting configuration accepts standard SCT foot, flange, or clevis accessories if the application later requires a fixed mount.
Multi-position checklist
- ✓ Need 4 repeatable stops?
- ✓ Section strokes 15 + 40 mm suit your layout?
- ✓ Required force at your working pressure
- ✓ Port/thread type (PT/NPT/G)
- ✓ Magnet (-S) for sensors?
Installation & Maintenance Notes
- check Use clean air filtered to 40µm or finer.
- check Keep within 0.15 – 1.0 MPa operating pressure.
- check Plumb the two sections to the correct valves for each stop.
- check Adjust end cushion screws for smooth stops.
- check Use SCT mounting accessory (FA / FB / CA / CB / LB).
- check Installation by qualified personnel per AirTAC docs.
Airtac SCT80~100 Multi-Position Tandem Cylinder SCT80X15X40S FAQ
It provides four distinct mechanical stops: 0 mm (fully retracted), 15 mm (section one extended), 40 mm (section two extended), and 55 mm (both sections extended, total travel). The stops are fixed by the two stroke lengths and are not infinitely adjustable.
No. Like all standard pneumatic cylinders, the SCT80X15X40S will drift or drop if supply pressure is lost or the directional valve is centred. To hold a load at an intermediate stop without live pressure, you must add an external rod brake, a pilot-operated check valve, or a mechanical lock.
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