Airtac SCT80~100 Multi-Position Tandem Cylinder SCT100X25X2
The AirTAC Airtac SCT80~100 Multi-Position Tandem Cylinder SCT100X25X2 is a genuine double-acting MULTI-POSITION (tandem) air cylinder: two piston sections of 25mm and 2mm give 4 controllable stop positions across a 27mm total travel, with a Ø100mm bore, PT1/2 ports and adjustable end cushioning.
- BoreØ100 mm
- Stroke 125 mm
- Stroke 22 mm
- Total travel27 mm
- Positions4 stops
- Port sizePT1/2
About the Airtac SCT80~100 Multi-Position Tandem Cylinder SCT100X25X2
The SCT100X25X2 is a 100 mm bore tandem cylinder that delivers four fixed rod positions from two independent piston sections: 0 mm (fully retracted), 2 mm, 25 mm, and the combined total travel of 27 mm. Each section provides a push force of 3927 N at 0.5 MPa, rising to 7068 N at the maximum operating pressure of 0.9 MPa, making it suitable for heavy-duty short-stroke positioning tasks.
This tie-rod cylinder uses a 25 mm diameter rod with an M20x1.5 thread and PT1/2 ports. The body length A(SCT) is 308 mm, and the adjustable pneumatic cushion at each end is 29 mm long, allowing you to dial in smooth deceleration even with high inertial loads during rapid 30-800 mm/s cycles.
Airtac SCT80~100 Multi-Position Tandem Cylinder SCT100X25X2 Technical Specifications
| Model | Airtac SCT80~100 Multi-Position Tandem Cylinder SCT100X25X2 |
|---|---|
| Series | SCT multi-position tie-rod cylinder |
| Bore size | Ø100 mm |
| Stroke 1 / Stroke 2 | 25 / 2 mm |
| Total travel | 27 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) | 2 mm |
| P3 (both extended) | 27 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 SCT100X25X2
| SCT | Multi-position (tandem) tie-rod cylinder series. |
|---|---|
| 100 | Bore size in mm (SCT range 32–100). |
| ×25 | Stroke 1 (section 1) in mm. |
| ×2 | 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 SCT100X25X2 Is Used
Two-Stage Precision Pressing
Use the 2 mm stroke for a light pre-clamp or sensing position, then actuate the 25 mm stroke to apply full pressing force, all within a single compact cylinder body.
Dual-Position Gate Diverter
Control a chute gate to three distinct positions—closed, a 2 mm crack for sampling, and a full 25 mm open for bulk flow—using simple pneumatic logic.
Multi-Stop Part Staging
Stage parts at a 2 mm inspection gap or a 25 mm transfer height on a conveyor line, achieving two work positions without needing a servo axis.
Is the Airtac SCT80~100 Multi-Position Tandem Cylinder SCT100X25X2 the Right Cylinder?
Select the SCT100X25X2 when your application requires a compact, integrated solution for reaching two distinct extended positions plus a retracted home, eliminating the complexity and plumbing of two separate 100 mm bore cylinders with external hard stops. If your force requirement is lower, stepping down to an 80 mm bore SCT reduces the per-section push force to 2513 N at 0.5 MPa, which may allow for a smaller valve and lower air consumption.
For a direct replacement, match the 100 mm bore, both the 25 mm and 2 mm section strokes, PT port thread, and basic mounting configuration. If position sensing is needed, specify the -S magnet option to accept CMSG/DMSG sensors.
Multi-position checklist
- ✓ Need 4 repeatable stops?
- ✓ Section strokes 25 + 2 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 SCT100X25X2 FAQ
This model provides four discrete rod positions: 0 mm (fully retracted), 2 mm (section 2 extended), 25 mm (section 1 extended), and 27 mm (both sections extended, total travel). The stops are fixed by the two stroke lengths and are not infinitely adjustable.
No. Like any standard pneumatic cylinder, the SCT100X25X2 will drift or drop if pressure is exhausted from a section. To safely hold a load at an intermediate position without live pressure, you must add an external rod lock or a pilot-operated check valve in the circuit.
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