Airtac SCT80~100 Multi-Position Tandem Cylinder SCT100X75X50H
The AirTAC Airtac SCT80~100 Multi-Position Tandem Cylinder SCT100X75X50H is a genuine double-acting MULTI-POSITION (tandem) air cylinder: two piston sections of 75mm and 50mm give 4 controllable stop positions across a 125mm total travel, with a Ø100mm bore, PT1/2 ports and adjustable end cushioning.
- BoreØ100 mm
- Stroke 175 mm
- Stroke 250 mm
- Total travel125 mm
- Positions4 stops
- Port sizePT1/2
About the Airtac SCT80~100 Multi-Position Tandem Cylinder SCT100X75X50H
The SCT100X75X50H is a tandem multi-position cylinder that delivers four fixed rod positions: fully retracted (0 mm), 50 mm, 75 mm, and the total travel of 125 mm. Each 100 mm bore section generates a powerful push force of 3927 N 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 multi-stage pressing tasks.
This variant is built with high-temperature Viton (FKM) seals, designated by the 'H' suffix, extending the operating range from the standard -20°C up to +150°C for hot-environment automation. The cylinder uses a 25 mm diameter rod, PT1/2 ports, and has a 29 mm adjustable air cushion to manage end-of-stroke deceleration quietly.
Airtac SCT80~100 Multi-Position Tandem Cylinder SCT100X75X50H Technical Specifications
| Model | Airtac SCT80~100 Multi-Position Tandem Cylinder SCT100X75X50H |
|---|---|
| Series | SCT multi-position tie-rod cylinder |
| Bore size | Ø100 mm |
| Stroke 1 / Stroke 2 | 75 / 50 mm |
| Total travel | 125 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) | 50 mm |
| P3 (both extended) | 125 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 SCT100X75X50H
| SCT | Multi-position (tandem) tie-rod cylinder series. |
|---|---|
| 100 | Bore size in mm (SCT range 32–100). |
| ×75 | Stroke 1 (section 1) in mm. |
| ×50 | 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 SCT100X75X50H Is Used
Heavy Part Sorting
Diverts large castings or weldments to four separate chutes by pressurizing the 75 mm and 50 mm sections independently, achieving distinct reach positions without multiple actuators.
Multi-Stage Clamping
Applies a high-force initial clamp at the 50 mm stop and a secondary, deeper clamp at the full 125 mm extension, ideal for progressive forming or assembly fixtures.
Hot-Environment Indexing
With Viton seals rated to 150°C, this cylinder reliably indexes parts through a multi-stop oven or heated press line, providing four discrete positions for loading and unloading.
Is the Airtac SCT80~100 Multi-Position Tandem Cylinder SCT100X75X50H the Right Cylinder?
Select the SCT100X75X50H when a single actuator must index a heavy load to four distinct mechanical stops without the complexity of servo control or multiple cylinders. If your force requirement is lower, stepping down to the 80 mm bore reduces the per-section push force to 2513 N at 0.5 MPa, potentially saving space and air consumption. For a direct replacement, match the 100 mm bore, both the 75 mm and 50 mm strokes, PT port thread, basic mounting, and the Viton seal variant exactly to ensure mechanical and thermal compatibility.
Multi-position checklist
- ✓ Need 4 repeatable stops?
- ✓ Section strokes 75 + 50 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 SCT100X75X50H FAQ
This cylinder provides four discrete mechanical stops. By pressurizing the sections individually or together, the rod extends to 0 mm (retracted), 50 mm, 75 mm, or the full combined stroke of 125 mm. It is not a servo or infinitely variable positioner.
Yes, it often can. The SCT100X75X50H replaces a setup using two 100 mm bore cylinders to achieve three or four fixed positions, saving mounting space and simplifying the pneumatic circuit. Ensure the replacement matches the 100 mm bore, 75 mm and 50 mm strokes, PT ports, and Viton seal.
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