Airtac SCT80~100 Multi-Position Tandem Cylinder SCT100X25X80S
The AirTAC Airtac SCT80~100 Multi-Position Tandem Cylinder SCT100X25X80S 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 Ø100mm bore, PT1/2 ports and adjustable end cushioning.
- BoreØ100 mm
- Stroke 125 mm
- Stroke 280 mm
- Total travel105 mm
- Positions4 stops
- Port sizePT1/2
About the Airtac SCT80~100 Multi-Position Tandem Cylinder SCT100X25X80S
The SCT100X25X80S is a tandem multi-position cylinder delivering four discrete rod stops: 0 mm, 25 mm, 80 mm, and the full 105 mm travel. Each 100 mm bore section generates 3927 N of push force at 0.5 MPa, making it a powerful solution for heavy-duty material handling where multiple fixed positions are required.
This model includes a built-in magnet for direct mounting of CMSG/DMSG/EMSG sensors, enabling reliable end-of-stroke or mid-position detection without external brackets. The 25 mm diameter piston rod and PT1/2 porting support high flow, while the 29 mm adjustable air cushion at each end section helps manage kinetic energy during high-speed cycles.
Airtac SCT80~100 Multi-Position Tandem Cylinder SCT100X25X80S Technical Specifications
| Model | Airtac SCT80~100 Multi-Position Tandem Cylinder SCT100X25X80S |
|---|---|
| Series | SCT multi-position tie-rod cylinder |
| Bore size | Ø100 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 | 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) | 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 (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 SCT100X25X80S
| SCT | Multi-position (tandem) tie-rod cylinder series. |
|---|---|
| 100 | 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 SCT100X25X80S Is Used
4-Position Diverter Gate
Direct packages or parts to four separate conveyor lanes by pressurizing section 1, section 2, or both, achieving stops at 0, 25, 80, and 105 mm.
Two-Depth Heavy Press
Perform a shallow 25 mm pre-press and a deeper 80 mm final press in one cycle, with the 3927 N per-section force handling dense materials.
Multi-Stop Pallet Stop
Stop heavy pallets at three distinct positions along a roller conveyor for loading, strapping, and inspection, using the sensor magnet for position confirmation.
Is the Airtac SCT80~100 Multi-Position Tandem Cylinder SCT100X25X80S the Right Cylinder?
An SCT tandem cylinder replaces the complexity of two separate cylinders with external hard stops, providing a compact, pre-aligned unit with four fixed positions. For this 100 mm bore, the push force per section is 3927 N at 0.5 MPa. If a lower force is acceptable, stepping down to an 80 mm bore SCT80X25X80S reduces per-section push to 2513 N at the same pressure, saving space and air consumption.
When replacing an existing SCT100X25X80S, match the 100 mm bore, both the 25 mm and 80 mm section strokes, the PT port thread, and the built-in magnet (-S suffix). The 25 mm rod diameter is robust, but for the 80 mm stroke section, ensure the load is guided if significant side forces are present to prevent rod bending.
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 SCT100X25X80S FAQ
It provides 4 discrete rod positions: fully retracted (0 mm), 25 mm (section 1 extended), 80 mm (section 2 extended), and 105 mm (both sections extended). The positions are fixed by the two stroke lengths and are not infinitely adjustable.
No, the SCT100X25X80S does not have a mechanical lock. If air pressure is lost or a valve centers, the piston can drift. To hold a load at an intermediate position without live pressure, you must add an external rod brake or a pilot-operated check valve.
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