Airtac SCT80~100 Multi-Position Tandem Cylinder SCT100X75X25
The AirTAC Airtac SCT80~100 Multi-Position Tandem Cylinder SCT100X75X25 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 SCT100X75X25
The SCT100X75X25 is a double-acting multi-position tandem cylinder that creates four distinct rod positions from two strokes: 0 mm (fully retracted), 25 mm, 75 mm, and the full 100 mm total travel. Each piston section delivers a robust 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 diverting tasks.
Built on a 100 mm bore with a rigid 25 mm diameter rod and M20x1.5 rod thread, this cylinder uses PT1/2 ports and features a 29 mm adjustable air cushion at each end for smooth deceleration. The body length A(SCT) is 308 mm, providing a compact tandem package for applications requiring multiple positive stops without complex external hardware.
Airtac SCT80~100 Multi-Position Tandem Cylinder SCT100X75X25 Technical Specifications
| Model | Airtac SCT80~100 Multi-Position Tandem Cylinder SCT100X75X25 |
|---|---|
| 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 SCT100X75X25
| 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 SCT100X75X25 Is Used
Two-Way Part Diverting
Uses the 25 mm and 75 mm stops to route heavy components to two separate conveyor lanes, with the full 100 mm stroke providing a third reject or bypass position.
Staggered Depth Pressing
Provides two distinct pressing depths (25 mm and 75 mm) in a single cycle, ideal for inserting bushings or fasteners to different depths in an assembly fixture.
Multi-Stop Clamping
Clamps workpieces of two different thicknesses by selecting the 25 mm or 75 mm position, eliminating the need for manual shim changes between part batches.
Is the Airtac SCT80~100 Multi-Position Tandem Cylinder SCT100X75X25 the Right Cylinder?
This SCT model provides a 4-position solution where the stroke differential (75 mm and 25 mm) maps directly to two separate stop points, plus the combined 100 mm position. When evaluating whether to step up or down, the 80 mm bore SCT offers 2513 N push at 0.5 MPa per section, while this 100 mm bore provides 3927 N—choose the larger frame when your load exceeds roughly 2500 N per actuation. For replacement, match an SCT100 with both strokes (75 and 25 mm), PT port thread, basic mounting, and no magnet to ensure identical fit and function. Given the 75 mm section stroke, rod bending is not a primary concern here, but always align the load axially to preserve seal life.
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 SCT100X75X25 FAQ
It provides 4 discrete mechanical stops: 0 mm (fully retracted), 25 mm, 75 mm, and 100 mm (fully extended). These are fixed by the two piston sections and selected by pressurising section one, section two, or both simultaneously.
Yes, if your application needs stops at 25 mm and 75 mm. The SCT tandem cylinder replaces two individual cylinders and their mounting hardware with a single unit, reducing space and plumbing complexity. Ensure the replacement matches the 100 mm bore, both stroke lengths, PT1/2 ports, and basic mounting style.
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