Airtac SCT80~100 Multi-Position Tandem Cylinder SCT100X75X25S
The AirTAC Airtac SCT80~100 Multi-Position Tandem Cylinder SCT100X75X25S is a genuine double-acting MULTI-POSITION (tandem) air cylinder: two piston sections of 75mm and 25mm give 4 controllable stop positions across a 100mm total travel, with a Ø100mm bore, PT1/2 ports and adjustable end cushioning.
- BoreØ100 mm
- Stroke 175 mm
- Stroke 225 mm
- Total travel100 mm
- Positions4 stops
- Port sizePT1/2
About the Airtac SCT80~100 Multi-Position Tandem Cylinder SCT100X75X25S
The SCT100X75X25S is a tandem multi-position pneumatic cylinder that delivers four fixed rod positions: fully retracted (0 mm), 25 mm, 75 mm, and the combined total travel of 100 mm. By pressurizing the two piston sections independently or together, you gain simple, repeatable discrete stopping without complex servo controls. Each 100 mm bore section generates a substantial 3927 N of push force at 0.5 MPa, rising to 7068 N at the maximum operating pressure of 0.9 MPa.
This model includes a built-in magnet (-S suffix), allowing direct mounting of CMSG, DMSG, or EMSG reed and solid-state sensors along the tie-rod barrel for reliable end-of-stroke or intermediate position detection. The 25 mm diameter piston rod and 29 mm air cushion provide smooth deceleration at each stop. The body length A(SCT) is 308 mm, and the standard PT1/2 ports ensure straightforward pneumatic connection.
Airtac SCT80~100 Multi-Position Tandem Cylinder SCT100X75X25S Technical Specifications
| Model | Airtac SCT80~100 Multi-Position Tandem Cylinder SCT100X75X25S |
|---|---|
| Series | SCT multi-position tie-rod cylinder |
| Bore size | Ø100 mm |
| Stroke 1 / Stroke 2 | 75 / 25 mm |
| Total travel | 100 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) | 75 mm |
| P2 (section 2) | 25 mm |
| P3 (both extended) | 100 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 SCT100X75X25S
| SCT | Multi-position (tandem) tie-rod cylinder series. |
|---|---|
| 100 | Bore size in mm (SCT range 32–100). |
| ×75 | 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 SCT100X75X25S Is Used
Two-Stage Sorting Gate
Use the 25 mm stroke for a partial gate opening to divert small items and the 75 mm stroke for a full opening to pass larger packages, with the 100 mm combined position for a maintenance clear-out mode.
Dual-Depth Pressing
Achieve a light pre-press at 25 mm extension and a full forming press at 75 mm, using the combined 100 mm travel for part ejection. The per-section force at 0.7 MPa is 5497 N for consistent forming pressure.
Multi-Stop Pusher
Push products to three different conveyor lanes by stopping the rod at 25 mm, 75 mm, or the full 100 mm extension. The built-in magnet confirms each position, ensuring reliable lane assignment.
Is the Airtac SCT80~100 Multi-Position Tandem Cylinder SCT100X75X25S the Right Cylinder?
Choose the SCT100X75X25S when your application requires a compact, all-in-one actuator to reach two distinct forward positions—here 25 mm and 75 mm—plus a combined 100 mm stroke, avoiding the cost and complexity of mounting two separate cylinders. The built-in magnet makes sensor integration tool-free. If a similar position set needs less force, stepping down to an 80 mm bore (2513 N push per section at 0.5 MPa) can reduce air consumption and physical size. For replacement, match the 100 mm bore, the exact 75 mm and 25 mm section strokes, PT port thread, and the -S magnet option. Basic mounting is used here, so the cylinder body mounts directly via the tie-rod end nuts.
Multi-position checklist
- ✓ Need 4 repeatable stops?
- ✓ Section strokes 75 + 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 SCT100X75X25S FAQ
This 4-position cylinder stops at 0 mm (fully retracted), 25 mm (first section extended), 75 mm (second section extended), and 100 mm (both sections extended, total stroke). The positions are discrete and selected by pressurizing the appropriate cylinder ports.
The SCT tandem design integrates both strokes on a single common rod, ensuring perfect axial alignment and reducing overall length compared to a back-to-back cylinder setup. It also simplifies plumbing and eliminates the need for external coupling brackets, while the built-in magnet provides sensor feedback for all positions from one compact unit.
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