Airtac SCT80~100 Multi-Position Tandem Cylinder SCT100X250X25S
The AirTAC Airtac SCT80~100 Multi-Position Tandem Cylinder SCT100X250X25S is a genuine double-acting MULTI-POSITION (tandem) air cylinder: two piston sections of 250mm and 25mm give 4 controllable stop positions across a 275mm total travel, with a Ø100mm bore, PT1/2 ports and adjustable end cushioning.
- BoreØ100 mm
- Stroke 1250 mm
- Stroke 225 mm
- Total travel275 mm
- Positions4 stops
- Port sizePT1/2
About the Airtac SCT80~100 Multi-Position Tandem Cylinder SCT100X250X25S
The SCT100X250X25S is a tandem multi-position cylinder that provides four fixed rod positions: fully retracted (0 mm), 25 mm, 250 mm, and the combined stroke of 275 mm. Each piston section delivers a powerful 3927 N of push force at 0.5 MPa, making it suitable for heavy-duty sorting or staging where two distinct extended stops are needed.
This model features a built-in magnet, allowing CMSG, DMSG, or EMSG sensors to be clamped directly onto the tie-rod barrel for reliable end-of-stroke or mid-stroke position sensing. The 100 mm bore cylinder uses a 25 mm diameter rod, M20x1.5 rod thread, and PT1/2 ports, with a robust 29 mm air cushion to decelerate the 275 mm total travel.
Airtac SCT80~100 Multi-Position Tandem Cylinder SCT100X250X25S Technical Specifications
| Model | Airtac SCT80~100 Multi-Position Tandem Cylinder SCT100X250X25S |
|---|---|
| Series | SCT multi-position tie-rod cylinder |
| Bore size | Ø100 mm |
| Stroke 1 / Stroke 2 | 250 / 25 mm |
| Total travel | 275 mm |
| Stop positions | 4 positions |
| Acting type | Double acting (tandem, multi-position) |
| Port size | PT1/2 |
| 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, 29 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) | 250 mm |
| P2 (section 2) | 25 mm |
| P3 (both extended) | 275 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 (Ø100mm)
| Pressure | Push force | Pull force |
|---|---|---|
| 0.5 MPa | 3927 N | 3682 N |
| 0.7 MPa | 5498 N | — |
| Max (@1.0 MPa) | 801 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 SCT100X250X25S
| SCT | Multi-position (tandem) tie-rod cylinder series. |
|---|---|
| 100 | Bore size in mm (SCT range 32–100). |
| ×250 | 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 SCT100X250X25S Is Used
Two-Stage Diverter Gate
Use the 25 mm stroke to crack open a material gate for fines and the full 275 mm travel to open it completely for bulk flow, controlling two distinct material paths from one chute.
Sequential Part Staging
Advance a stop pin to 25 mm to separate a single part from a stack, then extend to 250 mm to push it fully onto the next conveyor zone, all with one actuator and sensor feedback.
Dual-Depth Pressing
Perform a light pre-press at the 25 mm position and a final high-force press at the 250 mm stroke, using the 3927 N per-section force to consolidate assemblies in two stages.
Is the Airtac SCT80~100 Multi-Position Tandem Cylinder SCT100X250X25S the Right Cylinder?
Choose the SCT when your application requires two separate extended stopping points from a single cylinder body, eliminating the complexity of two individual actuators and external hard stops. For this 100 mm bore model, if the 3927 N push force per section is more than required, stepping down to an 80 mm bore provides 2513 N at 0.5 MPa, potentially reducing air consumption and physical size. Ensure the replacement matches the 250 mm and 25 mm strokes, PT port thread, and the integrated magnet sensor option.
Multi-position checklist
- ✓ Need 4 repeatable stops?
- ✓ Section strokes 250 + 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 SCT100X250X25S FAQ
This 4-position cylinder stops at 0 mm (fully retracted), 25 mm, 250 mm, and 275 mm (full extension). You select the position by pressurizing the 25 mm section, the 250 mm section, or both simultaneously.
Match the 100 mm bore, both strokes (250 mm and 25 mm), the PT port thread, and the -S magnet option. The basic mounting style means no extra brackets are attached, so verify your existing mounting feet or flange match the tie-rod body.
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