Airtac SCT80~100 Multi-Position Tandem Cylinder SCT80X125X25
The AirTAC Airtac SCT80~100 Multi-Position Tandem Cylinder SCT80X125X25 is a genuine double-acting MULTI-POSITION (tandem) air cylinder: two piston sections of 125mm and 25mm give 4 controllable stop positions across a 150mm total travel, with a Ø80mm bore, PT3/8 ports and adjustable end cushioning.
- BoreØ80 mm
- Stroke 1125 mm
- Stroke 225 mm
- Total travel150 mm
- Positions4 stops
- Port sizePT3/8
About the Airtac SCT80~100 Multi-Position Tandem Cylinder SCT80X125X25
The SCT80X125X25 is a double-acting multi-position tandem cylinder that delivers four distinct rod positions: fully retracted (0 mm), 25 mm, 125 mm, and the total extended travel of 150 mm. Each 80 mm bore section generates a push force of 2513 N at 0.5 MPa, making it suitable for tasks requiring two different short-to-medium extension steps from a single compact unit.
Built on a robust tie-rod design with a 25 mm diameter rod and PT3/8 ports, this cylinder features a 28 mm adjustable air cushion at each end for smooth deceleration. The body length A(SCT) is 296 mm, providing a known footprint for machine layout. At the maximum operating pressure of 0.9 MPa, a single section can deliver up to 4523 N of thrust.
Airtac SCT80~100 Multi-Position Tandem Cylinder SCT80X125X25 Technical Specifications
| Model | Airtac SCT80~100 Multi-Position Tandem Cylinder SCT80X125X25 |
|---|---|
| Series | SCT multi-position tie-rod cylinder |
| Bore size | Ø80 mm |
| Stroke 1 / Stroke 2 | 125 / 25 mm |
| Total travel | 150 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) | 125 mm |
| P2 (section 2) | 25 mm |
| P3 (both extended) | 150 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 SCT80X125X25
| SCT | Multi-position (tandem) tie-rod cylinder series. |
|---|---|
| 80 | Bore size in mm (SCT range 32–100). |
| ×125 | 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 SCT80X125X25 Is Used
Two-Stage Diverter Gate
Uses the 25 mm stroke for a partial gate opening and the 125 mm stroke for full diversion, routing materials to two different chutes from one actuator.
Dual-Depth Clamping Fixture
Provides a light clamp at 25 mm extension for delicate parts and a full-force clamp at 125 mm for robust workpieces, all from one cylinder.
Multi-Stop Pusher
Pushes products to a primary stop at 125 mm and a secondary closer stop at 25 mm on a packaging line, eliminating the need for a second pusher station.
Is the Airtac SCT80~100 Multi-Position Tandem Cylinder SCT80X125X25 the Right Cylinder?
Choose the SCT80X125X25 when your application needs two distinct forward positions without the complexity of two separate cylinders and external hard stops. The 125 mm and 25 mm stroke combination is ideal for a primary long travel with a secondary short positioning step. If higher force is required, consider stepping up to the SCT100 bore, which provides 3927 N of push per section at 0.5 MPa. For replacement, match the 80 mm bore, both the 125 mm and 25 mm strokes, PT port thread, and basic mounting. Note that the 125 mm stroke section is long enough that guiding the rod externally is recommended if significant side loads are present.
Multi-position checklist
- ✓ Need 4 repeatable stops?
- ✓ Section strokes 125 + 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 SCT80X125X25 FAQ
This tandem cylinder provides four discrete rod positions: 0 mm (fully retracted), 25 mm (stroke 2 only), 125 mm (stroke 1 only), and 150 mm (both strokes extended).
Yes, it is designed to replace two individual cylinders with 125 mm and 25 mm strokes that work on the same rod axis. Ensure the replacement matches the 80 mm bore, PT3/8 ports, and basic mounting configuration.
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