Airtac SCT32-63 Multi-Position Tandem Air Cylinder SCT63X25X25
The AirTAC Airtac SCT32-63 Multi-Position Tandem Air Cylinder SCT63X25X25 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 Ø63mm bore, PT1/4 ports and adjustable end cushioning.
- BoreØ63 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 SCT63X25X25
The SCT63X25X25 is a tie-rod multi-position cylinder that creates three fixed rod stops—fully retracted, 25 mm, and 50 mm total travel—by pressurising its two tandem piston sections independently. Each 63 mm bore section generates 1559 N of push force at 0.5 MPa (2805 N at 0.9 MPa), driven through a rigid 20 mm diameter rod with M16x1.5 threads.
With a compact 249 mm body length A(SCT) and 28 mm of adjustable air cushion at each end, it decelerates loads smoothly without external shocks. The PT1/4 ports and standard TPU seals suit filtered-air systems from -20 to +70 °C, making it a practical drop-in for short-stroke sorting or diverting tasks where two separate cylinders would add bulk and plumbing.
Airtac SCT32-63 Multi-Position Tandem Air Cylinder SCT63X25X25 Technical Specifications
| Model | Airtac SCT32-63 Multi-Position Tandem Air Cylinder SCT63X25X25 |
|---|---|
| Series | SCT multi-position tie-rod cylinder |
| Bore size | Ø63 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, 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 (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 (Ø63mm)
| Pressure | Push force | Pull force |
|---|---|---|
| 0.5 MPa | 1559 N | 1402 N |
| 0.7 MPa | 2182 N | — |
| Max (@1.0 MPa) | 318 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 SCT63X25X25
| SCT | Multi-position (tandem) tie-rod cylinder series. |
|---|---|
| 63 | 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 SCT63X25X25 Is Used
3-Way Diverter Gate
The three discrete positions (0, 25, 50 mm) map directly to a three-way chute or lane diverter on a packaging line, routing products left, centre, or right with a single compact actuator.
Two-Depth Press Insertion
Use the 25 mm and 50 mm stops for a two-stage press-fit operation—partial insertion at stroke1, full-depth seating at total travel—without needing a servo or two separate press cylinders.
Multi-Stop Part Staging
In a pick-and-place nest, the SCT63X25X25 advances a stop pin to 25 mm for one component family and 50 mm for another, giving the cell controller two hard-stop references from one pneumatic circuit.
Is the Airtac SCT32-63 Multi-Position Tandem Air Cylinder SCT63X25X25 the Right Cylinder?
Choose the SCT63X25X25 when you need three distinct mechanical stops without the complexity of external hard stops or two single cylinders. If your load requires more force, stepping up to the 80 mm bore provides 2513 N push per section at 0.5 MPa; for a lighter, more compact design, the 50 mm bore delivers 982 N. Both strokes are standard 25 mm, so lead time is typically short.
For direct replacement, match the 63 mm bore, both 25 mm strokes, PT1/4 port thread, and basic mounting. If you later add a CMSG or DMSG sensor, order the -S magnet variant. Note that when a section is depressurised, the piston does not hold its position under load—add an external rod lock if a stop must be maintained without live air pressure.
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 SCT63X25X25 FAQ
It provides 3 discrete mechanical stops because both section strokes are equal at 25 mm. The rod positions are 0 mm (fully retracted), 25 mm (first section extended), and 50 mm (both sections extended, total travel).
Yes, if your sequence requires only the three fixed stops 0/25/50 mm. The SCT tandem body eliminates the need to mount and plumb two individual cylinders, saving space and reducing the valve count. Ensure the per-section force (1559 N push at 0.5 MPa) meets your load requirement at each stop.
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