Airtac SCT80~100 Multi-Position Tandem Cylinder SCT80X25X25
The AirTAC Airtac SCT80~100 Multi-Position Tandem Cylinder SCT80X25X25 is a genuine double-acting MULTI-POSITION (tandem) air cylinder: two piston sections of 25mm and 25mm give 3 controllable stop positions across a 50mm total travel, with a Ø80mm bore, PT3/8 ports and adjustable end cushioning.
- BoreØ80 mm
- Stroke 125 mm
- Stroke 225 mm
- Total travel50 mm
- Positions3 stops
- Port sizePT3/8
About the Airtac SCT80~100 Multi-Position Tandem Cylinder SCT80X25X25
The SCT80X25X25 is a tandem double-acting pneumatic cylinder that provides three fixed rod positions—fully retracted (0 mm), extended by the first stroke (25 mm), and fully extended using both strokes (50 mm). Each 80 mm bore piston section generates 2513 N of push force at 0.5 MPa, scaling up to 4523 N at the maximum operating pressure of 0.9 MPa, making it a compact alternative to two separate cylinders for short-throw, multi-stop tasks.
This tie-rod cylinder uses a 25 mm diameter rod with PT3/8 ports and an M20x1.5 rod thread. The adjustable air cushion at each end, with a 28 mm cushion length, decelerates the load smoothly. The body length A(SCT) is 296 mm, and the standard TPU seals suit an operating temperature range of -20 to +70 °C.
Airtac SCT80~100 Multi-Position Tandem Cylinder SCT80X25X25 Technical Specifications
| Model | Airtac SCT80~100 Multi-Position Tandem Cylinder SCT80X25X25 |
|---|---|
| Series | SCT multi-position tie-rod cylinder |
| Bore size | Ø80 mm |
| Stroke 1 / Stroke 2 | 25 / 25 mm |
| Total travel | 50 mm |
| Stop positions | 3 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 (3)
| Position | Rod extension |
|---|---|
| P0 (retracted) | 0 mm |
| P1 (section 1) | 25 mm |
| P2 (both extended) | 50 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 SCT80X25X25
| SCT | Multi-position (tandem) tie-rod cylinder series. |
|---|---|
| 80 | Bore size in mm (SCT range 32–100). |
| ×25 | Stroke 1 (section 1) in mm. |
| ×25 | 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 SCT80X25X25 Is Used
Two-Way Diverter Gate
Actuates a flap to three positions—closed (0 mm), divert to lane A (25 mm), and divert to lane B (50 mm)—on a compact conveyor merge, using the discrete stops for repeatable alignment without sensors.
Two-Stage Clamping
Provides a low-force pre-clamp at the 25 mm position to align a part, then advances to the full 50 mm stroke for final high-force holding, all from a single cylinder body.
Dual-Depth Assembly Press
Installs two different components at separate depths in one station. The rod stops at 25 mm to seat a bushing, then retracts and re-extends to 50 mm to press a bearing, controlled purely by port pressure.
Is the Airtac SCT80~100 Multi-Position Tandem Cylinder SCT80X25X25 the Right Cylinder?
Choose the SCT80X25X25 when a machine requires two distinct extended positions within a 50 mm total stroke, eliminating the complexity of dual cylinders and external hard stops. If the force requirement is lower, stepping down to a 63 mm bore reduces the per-section push to 1559 N at 0.5 MPa, saving energy and space. For a higher thrust demand, the 100 mm bore offers 3927 N per section.
A direct replacement must match the 80 mm bore, both 25 mm section strokes, and the PT port thread. Ensure the mounting style (basic, foot, or flange) and the absence of a magnet are identical to the original SCT unit to guarantee a drop-in fit without re-engineering the end-plate connections.
Multi-position checklist
- ✓ Need 3 repeatable stops?
- ✓ Section strokes 25 + 25 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 SCT80X25X25 FAQ
It provides three distinct mechanical stop positions because both section strokes are equal (25 mm). The rod positions are 0 mm (fully retracted), 25 mm (first section extended), and 50 mm (both sections extended, total travel).
Yes, if your application requires stops at 0, 25, and 50 mm. The SCT integrates both strokes into a single tie-rod body, reducing mounting hardware and eliminating the need to synchronize two separate cylinders. Ensure the port thread (PT) and mounting style match your existing setup.
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