Airtac SCT32-63 Multi-Position Tandem Air Cylinder SCT50X25X25
The AirTAC Airtac SCT32-63 Multi-Position Tandem Air Cylinder SCT50X25X25 is a genuine double-acting MULTI-POSITION (tandem) air cylinder: two piston sections of 25mm and 25mm give 3 controllable stop positions across a 50mm total travel, with a Ø50mm bore, PT1/4 ports and adjustable end cushioning.
- BoreØ50 mm
- Stroke 125 mm
- Stroke 225 mm
- Total travel50 mm
- Positions3 stops
- Port sizePT1/4
About the Airtac SCT32-63 Multi-Position Tandem Air Cylinder SCT50X25X25
The SCT50X25X25 is a 50 mm bore tandem multi-position cylinder that provides three distinct rod positions: fully retracted (0 mm), 25 mm, and the combined 50 mm total travel. Each piston section generates approximately 982 N of push force at 0.5 MPa, making it a compact solution for short-throw, two-stop indexing tasks.
This tie-rod design features a 20 mm diameter piston rod and PT1/4 ports with a 21 mm adjustable air cushion at each end. The body length A(SCT) is a fixed 243 mm, offering a rigid platform for tasks where you need to shuttle between two fixed end points without complex electronic controls.
Airtac SCT32-63 Multi-Position Tandem Air Cylinder SCT50X25X25 Technical Specifications
| Model | Airtac SCT32-63 Multi-Position Tandem Air Cylinder SCT50X25X25 |
|---|---|
| Series | SCT multi-position tie-rod cylinder |
| Bore size | Ø50 mm |
| Stroke 1 / Stroke 2 | 25 / 25 mm |
| Total travel | 50 mm |
| Stop positions | 3 positions |
| Acting type | Double acting (tandem, multi-position) |
| Port size | PT1/4 |
| Rod thread | M16×1.5 |
| 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, 21 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 (3)
| Position | Rod extension |
|---|---|
| P0 (retracted) | 0 mm |
| P1 (section 1) | 25 mm |
| P2 (both extended) | 50 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 (Ø50mm)
| Pressure | Push force | Pull force |
|---|---|---|
| 0.5 MPa | 982 N | 825 N |
| 0.7 MPa | 1374 N | — |
| Max (@1.0 MPa) | 200 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 SCT32-63 Multi-Position Tandem Air Cylinder SCT50X25X25
| SCT | Multi-position (tandem) tie-rod cylinder series. |
|---|---|
| 50 | Bore size in mm (SCT range 32–100). |
| ×25 | 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 SCT32-63 Multi-Position Tandem Air Cylinder SCT50X25X25 Is Used
Two-Position Diverter Gate
Shifts a small chute or gate between two fixed positions (retracted and 25 mm) to sort parts on a conveyor line, with the 50 mm full extension acting as an emergency bypass.
Short-Stroke Part Staging
Advances a workpiece to a 25 mm inspection station, then to a 50 mm ejection point. The discrete stops ensure consistent placement without overshoot.
Dual-Depth Pressing Insertion
Installs components to two controlled depths. The first 25 mm stroke seats a seal, and the combined 50 mm stroke fully presses a bushing, using the cylinder's rigid tie-rod construction.
Is the Airtac SCT32-63 Multi-Position Tandem Air Cylinder SCT50X25X25 the Right Cylinder?
Choose the SCT50X25X25 when you need a simple pneumatic solution for two positive stops, avoiding the cost and complexity of two separate cylinders or external hard stops. If your application requires more force, consider stepping up to the 63 mm bore, which delivers 1559 N of push per section at 0.5 MPa. For a direct replacement, match the 50 mm bore, both 25 mm strokes, PT port thread, and basic mounting configuration exactly.
Multi-position checklist
- ✓ Need 3 repeatable stops?
- ✓ Section strokes 25 + 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 SCT32-63 Multi-Position Tandem Air Cylinder SCT50X25X25 FAQ
It provides three distinct mechanical stops: 0 mm (fully retracted), 25 mm (first section extended), and 50 mm (both sections extended). Since both strokes are equal, the 25 mm position is shared, giving three unique rod locations.
Yes, it is a direct functional replacement for two back-to-back SC50X25 cylinders, saving space and eliminating the need for a coupling. Ensure the replacement matches the 50 mm bore, 25 mm strokes, PT1/4 ports, and that your mounting brackets suit the SCT's 243 mm body length.
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