Airtac SCT80~100 Multi-Position Tandem Cylinder SCT100X250X250S
The AirTAC Airtac SCT80~100 Multi-Position Tandem Cylinder SCT100X250X250S 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 SCT100X250X250S
The SCT100X250X250S is a double-acting multi-position tandem cylinder that provides three discrete rod stops: 0 mm (fully retracted), 250 mm, and 500 mm total travel. Each of the two 100 mm bore sections delivers 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 material handling and sorting tasks.
This model includes a built-in magnet (-S suffix), allowing direct mounting of CMSG, DMSG, or EMSG sensors along the tie-rod barrel for non-contact position feedback. The 25 mm diameter piston rod, PT1/2 port threads, and 29 mm adjustable air cushion at each end ensure robust, controlled motion. The body length A(SCT) is 308 mm, providing a compact footprint for its substantial 500 mm total stroke.
Airtac SCT80~100 Multi-Position Tandem Cylinder SCT100X250X250S Technical Specifications
| Model | Airtac SCT80~100 Multi-Position Tandem Cylinder SCT100X250X250S |
|---|---|
| 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 SCT100X250X250S
| 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 SCT100X250X250S Is Used
3-Position Diverter Gate
Controls a gate on a conveyor line with three positions: closed (0 mm), divert to lane A (250 mm), and divert to lane B (500 mm). The built-in magnet provides sensor confirmation at each stop.
Two-Depth Pressing
Executes a two-stage pressing operation, first advancing to a partial depth (250 mm) for a pre-forming step, then extending to full depth (500 mm) for final compaction, using the 7068 N force at 0.9 MPa.
Multi-Stop Pallet Lift
Lifts a heavy pallet to two distinct working heights. The cylinder stops precisely at 250 mm for ergonomic loading and at 500 mm for connection to an elevated roller conveyor, holding position under live pressure.
Is the Airtac SCT80~100 Multi-Position Tandem Cylinder SCT100X250X250S the Right Cylinder?
Choose the SCT tandem cylinder when your application requires two fixed, repeatable extension points without the complexity of two separate cylinders and external stops. This 100 mm bore model is the largest in the SCT range; if your load is lighter, stepping down to the 80 mm bore (2513 N push at 0.5 MPa) can reduce air consumption and cost. For replacement, match the 100 mm bore, both 250 mm strokes, PT port thread, and the -S magnet option.
With a 250 mm stroke per section, ensure the rod is adequately guided if significant side loads are present, as the extended length can create a bending moment. The basic mounting configuration requires a rigid, flat surface for installation; consider adding FA or LB mounting kits if panel or foot mounting is preferred.
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 SCT100X250X250S FAQ
This model provides 3 distinct mechanical stops because both strokes are equal at 250 mm. The rod positions are: 0 mm (fully retracted), 250 mm (first section extended), and 500 mm (both sections extended for total travel).
Yes, a single SCT100X250X250S can replace a pair of back-to-back SC100X250 cylinders in many applications, offering the same 3-position functionality in a simpler, more compact package. Ensure the replacement matches the 100 mm bore, 250 mm strokes, PT ports, and the -S magnet option.
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