Airtac SCT80~100 Multi-Position Tandem Cylinder SCT80X50X250S
The AirTAC Airtac SCT80~100 Multi-Position Tandem Cylinder SCT80X50X250S is a genuine double-acting MULTI-POSITION (tandem) air cylinder: two piston sections of 50mm and 250mm give 4 controllable stop positions across a 300mm total travel, with a Ø80mm bore, PT3/8 ports and adjustable end cushioning.
- BoreØ80 mm
- Stroke 150 mm
- Stroke 2250 mm
- Total travel300 mm
- Positions4 stops
- Port sizePT3/8
About the Airtac SCT80~100 Multi-Position Tandem Cylinder SCT80X50X250S
The SCT80X50X250S is an 80 mm bore tandem multi-position cylinder that provides four fixed rod positions: fully retracted (0 mm), 50 mm, 250 mm, and the total travel of 300 mm. Each piston section delivers a push force of 2513 N at 0.5 MPa, making it a robust actuator for tasks requiring a short first move and a longer secondary advance without the complexity of two separate cylinders.
This model includes a built-in magnet (-S suffix), allowing CMSG, DMSG, or EMSG sensors to be clamped directly onto the tie-rod barrel for non-contact position confirmation at each stop. The 25 mm diameter rod and 28 mm adjustable air cushion at each end provide reliable deceleration, while the PT3/8 ports supply standard pneumatic connections. The body length A(SCT) is 296 mm, forming a compact tandem unit for its stroke combination.
Airtac SCT80~100 Multi-Position Tandem Cylinder SCT80X50X250S Technical Specifications
| Model | Airtac SCT80~100 Multi-Position Tandem Cylinder SCT80X50X250S |
|---|---|
| Series | SCT multi-position tie-rod cylinder |
| Bore size | Ø80 mm |
| Stroke 1 / Stroke 2 | 50 / 250 mm |
| Total travel | 300 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) | 50 mm |
| P2 (section 2) | 250 mm |
| P3 (both extended) | 300 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 SCT80X50X250S
| SCT | Multi-position (tandem) tie-rod cylinder series. |
|---|---|
| 80 | Bore size in mm (SCT range 32–100). |
| ×50 | Stroke 1 (section 1) in mm. |
| ×250 | 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 SCT80X50X250S Is Used
Two-Stage Part Diverting
A short 50 mm stroke selects the diverter gate, and the 250 mm stroke pushes the part onto the correct conveyor lane, all controlled by one cylinder.
Sequential Clamping
The first 50 mm position applies a light pre-clamp, and the full 300 mm extension applies high-force clamping, ideal for assembly fixtures.
Multi-Depth Pressing
Achieve two distinct pressing depths (50 mm and 300 mm) in a single cycle for inserting components at different levels in a housing.
Is the Airtac SCT80~100 Multi-Position Tandem Cylinder SCT80X50X250S the Right Cylinder?
Select the SCT80X50X250S when your application requires a two-step linear motion with a short 50 mm first stage and a longer 250 mm second stage, all from a single rod assembly. This tandem cylinder is more compact and easier to plumb than two individual 80 mm bore cylinders with external bracketry. If your force requirement is lower, stepping down to a 63 mm bore reduces per-section push to 1559 N at 0.5 MPa, saving space and air consumption.
For direct replacement, match the 80 mm bore, both the 50 mm and 250 mm strokes, PT port thread, and the built-in magnet. The SCT uses tie-rod construction and accepts FA, FB, CA, CB, or LB mounting accessories, but this basic model ships without a bracket. Given the 250 mm second-stage stroke, ensure the rod is adequately guided if significant side loads are present to prevent bending.
Multi-position checklist
- ✓ Need 4 repeatable stops?
- ✓ Section strokes 50 + 250 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 SCT80X50X250S FAQ
This cylinder provides 4 discrete mechanical stops. The rod positions are 0 mm (fully retracted), 50 mm (first section extended), 250 mm (second section extended), and 300 mm (both sections extended).
Each of the two piston sections generates 2513 N of push force and 2268 N of pull force when operated at 0.5 MPa. The force is per actuated section, not a combined total.
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