Airtac SCT80~100 Multi-Position Tandem Cylinder SCT80X25X25S
The AirTAC Airtac SCT80~100 Multi-Position Tandem Cylinder SCT80X25X25S 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 SCT80X25X25S
The SCT80X25X25S is a double-acting multi-position tandem cylinder that delivers three distinct rod positions: fully retracted (0 mm), 25 mm, and the total travel of 50 mm. By pressurising one or both of its 80 mm bore sections, you get a per-section push force of 2513 N at 0.5 MPa, rising to 4523 N at the maximum operating pressure of 0.9 MPa. The 25 mm diameter rod and PT3/8 ports ensure robust flow for consistent cycling.
This model includes a built-in magnet, allowing direct mounting of CMSG, DMSG, or EMSG sensors on the tie-rod barrel for reliable end-of-stroke or mid-position sensing without extra brackets. The standard TPU seals provide a working temperature range of -20 to +70 °C, and the 28 mm adjustable air cushion at each end helps manage kinetic energy in high-speed applications. The body length A(SCT) is 296 mm, making it a compact solution for tasks needing short, repeatable stops.
Airtac SCT80~100 Multi-Position Tandem Cylinder SCT80X25X25S Technical Specifications
| Model | Airtac SCT80~100 Multi-Position Tandem Cylinder SCT80X25X25S |
|---|---|
| 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 SCT80X25X25S
| 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 SCT80X25X25S Is Used
3-Position Diverter Gates
Use the three discrete stops (0, 25, 50 mm) to guide packages or parts onto two different conveyor lanes from a single feed line, with a fully retracted home position for maintenance access.
Two-Depth Press Insertion
Achieve a shallow 25 mm pre-insertion and a full 50 mm press depth in sequence. The per-section 2513 N force at 0.5 MPa handles light to medium press-fit assembly tasks with high repeatability.
Multi-Stop Part Staging
Position a workpiece at a retracted safe zone (0 mm), a 25 mm inspection station, and a 50 mm welding or bonding station. The built-in magnet enables sensor confirmation at each critical stop point.
Is the Airtac SCT80~100 Multi-Position Tandem Cylinder SCT80X25X25S the Right Cylinder?
Choose the SCT80X25X25S when your application requires a compact actuator that can reliably stop at three fixed points without the complexity of servo controls. It outperforms a setup with two separate cylinders and external stops by providing a single, pre-aligned mechanical assembly. If you need higher force, stepping up to the SCT100 bore offers 3927 N of push per section at 0.5 MPa; for a lighter, more compact design, the SCT63 bore provides 1559 N. This cylinder is a direct replacement only for another AirTAC SCT with an 80 mm bore, both strokes set to 25 mm, PT3/8 ports, and the -S magnet option.
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 SCT80X25X25S FAQ
It provides 3 distinct mechanical stop positions because both strokes are equal at 25 mm. The rod can be positioned at 0 mm (fully retracted), 25 mm (one section extended), and 50 mm (both sections extended for total travel).
No. A standard single-rod SC cylinder only has two positions (extended and retracted). The SCT80X25X25S is a tandem cylinder that provides three discrete positions. A direct replacement must be another SCT model with an 80 mm bore, 25 mm stroke for both sections, PT3/8 ports, and the -S magnet option.
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