Airtac SCT80~100 Multi-Position Tandem Cylinder SCT80X25X2S
The AirTAC Airtac SCT80~100 Multi-Position Tandem Cylinder SCT80X25X2S is a genuine double-acting MULTI-POSITION (tandem) air cylinder: two piston sections of 25mm and 2mm give 4 controllable stop positions across a 27mm total travel, with a Ø80mm bore, PT3/8 ports and adjustable end cushioning.
- BoreØ80 mm
- Stroke 125 mm
- Stroke 22 mm
- Total travel27 mm
- Positions4 stops
- Port sizePT3/8
About the Airtac SCT80~100 Multi-Position Tandem Cylinder SCT80X25X2S
The SCT80X25X2S is a tandem multi-position cylinder that delivers four precise, repeatable stop locations along its stroke: 0 mm (fully retracted), 25 mm, 2 mm, and 27 mm (total extended). By pressurizing its two independently controlled 80 mm bore sections, you can select these discrete positions without external hard stops, simplifying pneumatic circuits that require a short advance and a micro-extension. Each section generates 2513 N of push force at 0.5 MPa, with a 25 mm rod and PT3/8 ports.
This model includes a built-in magnet (-S suffix), allowing CMSG, DMSG, or EMSG solid-state and reed sensors to be mounted directly on the tie-rod barrel for reliable end-of-position or mid-stroke sensing. The cylinder body has an A-length of 296 mm, uses an adjustable air cushion (28 mm length) for smooth deceleration, and operates on standard filtered air from 0.15 to 1.0 MPa. The default TPU seals and PT threads suit general industrial environments from -20 to +70 °C.
Airtac SCT80~100 Multi-Position Tandem Cylinder SCT80X25X2S Technical Specifications
| Model | Airtac SCT80~100 Multi-Position Tandem Cylinder SCT80X25X2S |
|---|---|
| Series | SCT multi-position tie-rod cylinder |
| Bore size | Ø80 mm |
| Stroke 1 / Stroke 2 | 25 / 2 mm |
| Total travel | 27 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) | 25 mm |
| P2 (section 2) | 2 mm |
| P3 (both extended) | 27 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 SCT80X25X2S
| SCT | Multi-position (tandem) tie-rod cylinder series. |
|---|---|
| 80 | Bore size in mm (SCT range 32–100). |
| ×25 | Stroke 1 (section 1) in mm. |
| ×2 | 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 SCT80X25X2S Is Used
Two-Stage Part Ejection
Uses the 25 mm stroke to push a part clear of a die, then the 2 mm stroke for a final, gentle tap-off into a chute, preventing damage.
Micro-Adjust Clamping
The 25 mm stroke rapidly closes a clamp, and the 2 mm stroke applies the final high-force grip, useful in delicate assembly or testing fixtures.
Dual-Depth Sorting Gate
Positions a diverter gate at 0 mm (home), 2 mm (thin part path), or 25 mm (thick part path) for sorting mixed components on a conveyor.
Is the Airtac SCT80~100 Multi-Position Tandem Cylinder SCT80X25X2S the Right Cylinder?
Choose the SCT80X25X2S when your application needs a primary 25 mm stroke with an additional 2 mm fine-positioning step, avoiding the complexity of two separate cylinders and brackets. This 80 mm bore provides a robust 2513 N push per section at 0.5 MPa; if your force requirement is lower, stepping down to a 63 mm bore (1559 N push) can reduce air consumption and physical size. For replacement, match the 80 mm bore, both 25 mm and 2 mm strokes, PT port threads, basic mounting, and the -S magnet option to ensure sensor compatibility.
Multi-position checklist
- ✓ Need 4 repeatable stops?
- ✓ Section strokes 25 + 2 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 SCT80X25X2S FAQ
This cylinder provides four discrete mechanical stops: 0 mm (fully retracted), 25 mm (first section extended), 2 mm (second section extended), and 27 mm (both sections extended). The positions are fixed by the two stroke lengths and are not infinitely adjustable.
Yes, it is designed to replace two individual cylinders mounted back-to-back for a two-position task. The SCT80X25X2S integrates both strokes into a single, compact tie-rod body, reducing mounting hardware and alignment issues. Ensure the replacement matches the 80 mm bore, 25 mm and 2 mm strokes, PT ports, and the -S magnet option.
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