Airtac SCT80~100 Multi-Position Tandem Cylinder SCT80X25X80S
The AirTAC Airtac SCT80~100 Multi-Position Tandem Cylinder SCT80X25X80S is a genuine double-acting MULTI-POSITION (tandem) air cylinder: two piston sections of 25mm and 80mm give 4 controllable stop positions across a 105mm total travel, with a Ø80mm bore, PT3/8 ports and adjustable end cushioning.
- BoreØ80 mm
- Stroke 125 mm
- Stroke 280 mm
- Total travel105 mm
- Positions4 stops
- Port sizePT3/8
About the Airtac SCT80~100 Multi-Position Tandem Cylinder SCT80X25X80S
The SCT80X25X80S is an AirTAC multi-position tandem cylinder that provides four distinct mechanical stops along its stroke: 0 mm (fully retracted), 25 mm, 80 mm, and the combined total travel of 105 mm. Each of the two piston sections delivers a push force of 2513 N at 0.5 MPa, with a maximum thrust of 4523 N per section at the 0.9 MPa operating limit, driven by a 25 mm diameter rod.
This model includes a built-in magnet (-S suffix), allowing direct mounting of CMSG, DMSG, or EMSG sensors on the tie-rod barrel for non-contact position sensing. The cylinder body length A(SCT) is 296 mm, and it uses PT3/8 ports with an adjustable pneumatic cushion of 28 mm on each section to manage end-of-stroke deceleration.
Airtac SCT80~100 Multi-Position Tandem Cylinder SCT80X25X80S Technical Specifications
| Model | Airtac SCT80~100 Multi-Position Tandem Cylinder SCT80X25X80S |
|---|---|
| Series | SCT multi-position tie-rod cylinder |
| Bore size | Ø80 mm |
| Stroke 1 / Stroke 2 | 25 / 80 mm |
| Total travel | 105 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) | 80 mm |
| P3 (both extended) | 105 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 SCT80X25X80S
| SCT | Multi-position (tandem) tie-rod cylinder series. |
|---|---|
| 80 | Bore size in mm (SCT range 32–100). |
| ×25 | Stroke 1 (section 1) in mm. |
| ×80 | 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 SCT80X25X80S Is Used
Two-Stage Sorting Gate
Uses the 25 mm and 105 mm positions to divert packages to two separate lanes from a single conveyor, with the intermediate 80 mm stop acting as a verification point for barcode scanning.
Dual-Depth Pressing
Provides a light-contact position at 25 mm for part alignment, followed by a full-press stroke to 80 mm or 105 mm for assembly, ensuring consistent insertion depth in two stages.
Sequential Part Feeding
Advances a workpiece to a 25 mm staging area, then to an 80 mm processing station, with the 105 mm position used to eject the finished part, all from one compact actuator.
Is the Airtac SCT80~100 Multi-Position Tandem Cylinder SCT80X25X80S the Right Cylinder?
Choose the SCT80X25X80S when your application requires a compact 4-position actuator with a short initial movement and a longer secondary stroke, eliminating the need for two separate cylinders and their associated mounting hardware. If the 2513 N push force at 0.5 MPa is insufficient, stepping up to the SCT100 bore provides 3927 N per section; for a lighter load, the SCT63 bore offers 1559 N.
As a direct replacement, match the 80 mm bore, both strokes (25 mm and 80 mm), PT3/8 ports, and the built-in magnet. This cylinder uses a basic mount; if a pivoting or panel mount is needed, consider the same model with a CA, CB, FA, or FB mounting suffix. The 25 mm rod is robust, but for strokes exceeding 300 mm in a future selection, evaluate side-loading and consider external guides.
Multi-position checklist
- ✓ Need 4 repeatable stops?
- ✓ Section strokes 25 + 80 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 SCT80X25X80S FAQ
This cylinder has 4 discrete mechanical stops: 0 mm (home), 25 mm (first section extended), 80 mm (second section extended), and 105 mm (both sections extended). The positions are fixed by the two stroke lengths and are not infinitely adjustable.
No, like any standard pneumatic cylinder, it will drift if pressure is lost or a valve is centered. The multi-position feature provides discrete stops under active control, but a mechanical lock or pilot-operated check valve is required to hold a load without live air pressure.
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