Airtac SCT80~100 Multi-Position Tandem Cylinder SCT100X25X25
The AirTAC Airtac SCT80~100 Multi-Position Tandem Cylinder SCT100X25X25 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 Ø100mm bore, PT1/2 ports and adjustable end cushioning.
- BoreØ100 mm
- Stroke 125 mm
- Stroke 225 mm
- Total travel50 mm
- Positions3 stops
- Port sizePT1/2
About the Airtac SCT80~100 Multi-Position Tandem Cylinder SCT100X25X25
The SCT100X25X25 is a 100 mm bore multi-position pneumatic cylinder that delivers three fixed rod positions: fully retracted (0 mm), 25 mm, and the combined 50 mm total travel. Each piston section generates 3927 N of push force at 0.5 MPa, rising to 7068 N at the maximum operating pressure of 0.9 MPa, making it suitable for heavy-duty sorting or clamping tasks requiring two distinct extended stops.
Built on a robust tie-rod design with a 25 mm diameter rod and PT1/2 ports, this double-acting tandem cylinder uses adjustable end cushioning (29 mm cushion length) to manage end-of-stroke impact. The body length A(SCT) is 308 mm, providing a compact footprint for a 100 mm bore unit with two 25 mm stroke sections.
Airtac SCT80~100 Multi-Position Tandem Cylinder SCT100X25X25 Technical Specifications
| Model | Airtac SCT80~100 Multi-Position Tandem Cylinder SCT100X25X25 |
|---|---|
| Series | SCT multi-position tie-rod cylinder |
| Bore size | Ø100 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 | 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 (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 (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 SCT100X25X25
| SCT | Multi-position (tandem) tie-rod cylinder series. |
|---|---|
| 100 | 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 SCT100X25X25 Is Used
Two-Position Part Staging
Pneumatically advance a heavy fixture to a pre-stage location at 25 mm, then to a final process position at 50 mm, using a single actuator for simplified control.
Dual-Depth Press Operations
Perform a light press or clamp at the 25 mm stroke, followed by a full-force seating operation at the 50 mm total stroke, with 7068 N of force available per section at 0.9 MPa.
Heavy-Part Diverter Gate
Shift a diverter chute between two distinct flow paths. The 25 mm rod provides the rigidity needed to guide large, heavy components without binding.
Is the Airtac SCT80~100 Multi-Position Tandem Cylinder SCT100X25X25 the Right Cylinder?
Choose the SCT100X25X25 when your application needs two positive stop locations in a single actuator body, eliminating the complexity and plumbing of two separate cylinders with external hard stops. If the force requirement is lower, stepping down to an 80 mm bore reduces the per-section push force to 2513 N at 0.5 MPa. For a direct replacement, match the 100 mm bore, both 25 mm strokes, PT port thread, and basic mounting configuration. An SCT with a built-in magnet (-S suffix) is required if you plan to use CMSG or DMSG sensors for position feedback.
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 SCT100X25X25 FAQ
This tandem cylinder provides 3 discrete mechanical stops. The rod positions are 0 mm (fully retracted), 25 mm (first section extended), and 50 mm (both sections extended). It does not allow intermediate stopping between these fixed points.
Yes, it is a direct functional replacement that saves space and simplifies valving. Ensure the replacement matches the 100 mm bore, both 25 mm strokes, PT1/2 ports, and basic mounting. The per-section force output is identical to a standard SC100X25.
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