Airtac SCT80~100 Multi-Position Tandem Cylinder SCT80X175X25
The AirTAC Airtac SCT80~100 Multi-Position Tandem Cylinder SCT80X175X25 is a genuine double-acting MULTI-POSITION (tandem) air cylinder: two piston sections of 175mm and 25mm give 4 controllable stop positions across a 200mm total travel, with a Ø80mm bore, PT3/8 ports and adjustable end cushioning.
- BoreØ80 mm
- Stroke 1175 mm
- Stroke 225 mm
- Total travel200 mm
- Positions4 stops
- Port sizePT3/8
About the Airtac SCT80~100 Multi-Position Tandem Cylinder SCT80X175X25
The SCT80X175X25 is an 80 mm bore tandem cylinder that provides four fixed rod positions: 0 mm (fully retracted), 25 mm, 175 mm, and the combined total travel of 200 mm. By pressurising the two piston sections independently or together, you get repeatable mechanical stops without external hardware. Each section generates 2513 N of push force at 0.5 MPa, rising to 4523 N at the maximum operating pressure of 0.9 MPa.
This model uses a 25 mm diameter rod with a PT3/8 port and an M20x1.5 rod thread. The tie-rod body has a length A of 296 mm, and each end cap includes a 28 mm adjustable air cushion to decelerate the load smoothly. Standard TPU seals suit ambient temperatures from -20 to +70 °C.
Airtac SCT80~100 Multi-Position Tandem Cylinder SCT80X175X25 Technical Specifications
| Model | Airtac SCT80~100 Multi-Position Tandem Cylinder SCT80X175X25 |
|---|---|
| Series | SCT multi-position tie-rod cylinder |
| Bore size | Ø80 mm |
| Stroke 1 / Stroke 2 | 175 / 25 mm |
| Total travel | 200 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) | 175 mm |
| P2 (section 2) | 25 mm |
| P3 (both extended) | 200 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 SCT80X175X25
| SCT | Multi-position (tandem) tie-rod cylinder series. |
|---|---|
| 80 | Bore size in mm (SCT range 32–100). |
| ×175 | 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 SCT80X175X25 Is Used
Two-Depth Pressing
Use the 25 mm stop for a light pre-press or part location and the full 200 mm stroke for the main forming operation, all with one cylinder.
Diverting Gate
Position a diverter gate at 25 mm for a bypass lane and 175 mm for the main conveyor path, giving positive mechanical alignment at each stop.
Multi-Stop Feeding
Advance a workpiece 25 mm for a drilling station, then extend to 175 mm for a tapping head, achieving two process steps from a single feeder.
Is the Airtac SCT80~100 Multi-Position Tandem Cylinder SCT80X175X25 the Right Cylinder?
Choose the SCT when your application needs two or more hard stops from a single compact actuator, replacing a setup with two separate cylinders and external brackets. The 175 mm and 25 mm stroke combination suits a long primary advance with a short secondary positioning step. If you need more force, stepping up to the 100 mm bore provides 3927 N of push per section at 0.5 MPa; for a lighter load, the 63 mm bore delivers 1559 N. Ensure the rod is guided externally if the 175 mm stroke creates a side-load risk.
For a direct replacement, match the 80 mm bore, both strokes (175 mm and 25 mm), PT port thread, and basic mounting. If your original unit has a magnet for sensors, order the -S variant; for a front flange mount, specify the FA suffix.
Multi-position checklist
- ✓ Need 4 repeatable stops?
- ✓ Section strokes 175 + 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 SCT80X175X25 FAQ
The rod stops at four discrete positions: 0 mm (retracted), 25 mm, 175 mm, and the full combined stroke of 200 mm. You select the position by pressurising the 25 mm section, the 175 mm section, or both together.
Yes, if your sequence requires a 25 mm and a 175 mm stroke from a common rod axis. The SCT80X175X25 eliminates the need for a second cylinder, mounting bracket, and coupler, saving space and simplifying the air circuit.
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