Airtac SCT80~100 Multi-Position Tandem Cylinder SCT100X250X250
The AirTAC Airtac SCT80~100 Multi-Position Tandem Cylinder SCT100X250X250 is a genuine double-acting MULTI-POSITION (tandem) air cylinder: two piston sections of 250mm and 250mm give 3 controllable stop positions across a 500mm total travel, with a Ø100mm bore, PT1/2 ports and adjustable end cushioning.
- BoreØ100 mm
- Stroke 1250 mm
- Stroke 2250 mm
- Total travel500 mm
- Positions3 stops
- Port sizePT1/2
About the Airtac SCT80~100 Multi-Position Tandem Cylinder SCT100X250X250
The SCT100X250X250 is a 100 mm bore multi-position pneumatic cylinder that provides three fixed rod positions: fully retracted (0 mm), mid-stroke at 250 mm, and full extension at 500 mm. Each of its two tandem piston sections generates a push force of 3927 N at 0.5 MPa, scaling up to a robust 7068 N at the maximum operating pressure of 0.9 MPa, making it suitable for heavy-duty material handling tasks.
Built on a durable tie-rod design, this cylinder features a 25 mm diameter piston rod with an M20x1.5 thread and PT1/2 ports. The adjustable air cushion at each end is 29 mm long, providing effective deceleration for the 500 mm total travel. The body length A(SCT) is 308 mm, offering a compact footprint for its force class.
Airtac SCT80~100 Multi-Position Tandem Cylinder SCT100X250X250 Technical Specifications
| Model | Airtac SCT80~100 Multi-Position Tandem Cylinder SCT100X250X250 |
|---|---|
| Series | SCT multi-position tie-rod cylinder |
| Bore size | Ø100 mm |
| Stroke 1 / Stroke 2 | 250 / 250 mm |
| Total travel | 500 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) | 250 mm |
| P2 (both extended) | 500 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 SCT100X250X250
| SCT | Multi-position (tandem) tie-rod cylinder series. |
|---|---|
| 100 | Bore size in mm (SCT range 32–100). |
| ×250 | Stroke 1 (section 1) in mm. |
| ×250 | 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 SCT100X250X250 Is Used
3-Position Diverter Gate
Operates a heavy gate on a conveyor line with three defined positions: closed, partial-open for small items, and full-open for large pallets, using the 0, 250, and 500 mm stops.
Two-Depth Clamping Fixture
Provides a high-force clamp for workpieces of two different thicknesses. The 250 mm stop engages one part size, while the 500 mm total travel clamps a significantly larger variant.
Pallet Stop and Lift
Acts as a heavy-duty pallet stop with an intermediate lift position. Retracted allows passage, 250 mm stops the pallet, and 500 mm raises it for engagement with a transfer mechanism.
Is the Airtac SCT80~100 Multi-Position Tandem Cylinder SCT100X250X250 the Right Cylinder?
Select the SCT100X250X250 when your application requires a heavy push force at two distinct extended positions without the complexity of two separate cylinders and external stops. If the 3927 N push at 0.5 MPa exceeds your requirement, stepping down to an 80 mm bore reduces the per-section force to 2513 N, potentially saving on air consumption and cost. For replacement, match the 100 mm bore, both 250 mm strokes, PT port thread, and any specific mounting or magnet options exactly.
With a 250 mm stroke per section, consider the extended moment arm at full 500 mm travel. If the load is not guided externally, side-loading could cause uneven rod and bushing wear. Implementing a guide rail or rod-alignment coupler is recommended to ensure long seal life and smooth operation.
Multi-position checklist
- ✓ Need 3 repeatable stops?
- ✓ Section strokes 250 + 250 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 SCT100X250X250 FAQ
This tandem cylinder provides 3 discrete rod positions: 0 mm (fully retracted), 250 mm (first section extended), and 500 mm (both sections extended). The positions are fixed by the two 250 mm strokes and are selected by pressurizing the appropriate cylinder ports.
No, like any standard pneumatic cylinder, it will not hold position under a loss of pressure. The piston can drift or drop if air is exhausted or a valve centers. To safely hold a load at the 250 mm or 500 mm stop without live pressure, you must add an external mechanical rod lock or a pilot-operated check valve.
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