Airtac SCT80~100 Multi-Position Tandem Cylinder SCT80X50X175S
The AirTAC Airtac SCT80~100 Multi-Position Tandem Cylinder SCT80X50X175S is a genuine double-acting MULTI-POSITION (tandem) air cylinder: two piston sections of 50mm and 175mm give 4 controllable stop positions across a 225mm total travel, with a Ø80mm bore, PT3/8 ports and adjustable end cushioning.
- BoreØ80 mm
- Stroke 150 mm
- Stroke 2175 mm
- Total travel225 mm
- Positions4 stops
- Port sizePT3/8
About the Airtac SCT80~100 Multi-Position Tandem Cylinder SCT80X50X175S
The SCT80X50X175S multi-position cylinder delivers four distinct rod positions from its tandem piston sections: fully retracted (0 mm), 50 mm, 175 mm, and the combined total travel of 225 mm. Each 80 mm bore section generates 2513 N of push force at 0.5 MPa, making it a practical choice for diverting or sorting operations that need more than a standard three-stop cylinder. The 25 mm diameter rod and 28 mm adjustable air cushion at each end contribute to stable, controlled motion across the full stroke range.
This model is factory-equipped with a built-in magnet, allowing CMSG, DMSG, or EMSG sensors to be clamped directly onto the tie-rod barrel for reliable end-of-stroke or mid-position sensing without extra brackets. Operating on standard PT ports with TPU seals, it handles filtered air from -20 to +70 °C. The body length A is 296 mm, and the maximum thrust at 0.9 MPa reaches 4523 N per section, giving ample reserve for high-cycle applications.
Airtac SCT80~100 Multi-Position Tandem Cylinder SCT80X50X175S Technical Specifications
| Model | Airtac SCT80~100 Multi-Position Tandem Cylinder SCT80X50X175S |
|---|---|
| Series | SCT multi-position tie-rod cylinder |
| Bore size | Ø80 mm |
| Stroke 1 / Stroke 2 | 50 / 175 mm |
| Total travel | 225 mm |
| Stop positions | 4 positions |
| Acting type | Double acting (tandem, multi-position) |
| Port size | PT3/8 |
| 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, 28 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) | 50 mm |
| P2 (section 2) | 175 mm |
| P3 (both extended) | 225 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 (Ø80mm)
| Pressure | Push force | Pull force |
|---|---|---|
| 0.5 MPa | 2513 N | 2268 N |
| 0.7 MPa | 3519 N | — |
| Max (@1.0 MPa) | 513 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 SCT80X50X175S
| SCT | Multi-position (tandem) tie-rod cylinder series. |
|---|---|
| 80 | Bore size in mm (SCT range 32–100). |
| ×50 | Stroke 1 (section 1) in mm. |
| ×175 | 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 SCT80X50X175S Is Used
Four-Way Part Diverting
Uses the four fixed stops (0, 50, 175, 225 mm) to route products from a single infeed conveyor to four separate lanes or chutes in a packaging line.
Multi-Depth Pressing
Provides two distinct pressing depths at 50 mm and 175 mm, plus a full-depth stroke at 225 mm, for assembling components with staged insertion forces.
Staged Clamping Fixture
Applies a light pre-clamp at the 50 mm position, a full clamp at 175 mm, and a retracted release, simplifying complex workholding sequences with one actuator.
Is the Airtac SCT80~100 Multi-Position Tandem Cylinder SCT80X50X175S the Right Cylinder?
Choosing the SCT80X50X175S over two separate cylinders or an actuator with external hard stops simplifies the pneumatic circuit and guarantees the four discrete positions are mechanically fixed. If the 2513 N push force per section at 0.5 MPa is slightly above your requirement, stepping down to the 63 mm bore provides 1559 N per section, while moving up to the 100 mm bore increases it to 3927 N. For replacement, match the 80 mm bore, both the 50 mm and 175 mm strokes, the PT port thread, and the integrated magnet (-S suffix). With a total travel of 225 mm, the rod is well-supported, but if the load is applied off-axis, an external guide rail is recommended to prevent rod bending and premature seal wear.
Multi-position checklist
- ✓ Need 4 repeatable stops?
- ✓ Section strokes 50 + 175 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 SCT80X50X175S FAQ
This tandem cylinder provides four discrete mechanical stops: 0 mm (fully retracted), 50 mm (first section extended), 175 mm (second section extended), and 225 mm (both sections extended). The positions are fixed by the two stroke lengths and are not infinitely adjustable.
The SCT integrates both strokes onto a single common rod, guaranteeing a fixed spatial relationship between the 50 mm and 175 mm stops that two independent cylinders cannot easily replicate. It also reduces the overall footprint, simplifies mounting to a single set of foot or flange brackets, and cuts down on the number of valves and flow controls needed.
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