Airtac SCT32-63 Multi-Position Tandem Air Cylinder SCT63X25X125
The AirTAC Airtac SCT32-63 Multi-Position Tandem Air Cylinder SCT63X25X125 is a genuine double-acting MULTI-POSITION (tandem) air cylinder: two piston sections of 25mm and 125mm give 4 controllable stop positions across a 150mm total travel, with a Ø63mm bore, PT1/4 ports and adjustable end cushioning.
- BoreØ63 mm
- Stroke 125 mm
- Stroke 2125 mm
- Total travel150 mm
- Positions4 stops
- Port sizePT1/4
About the Airtac SCT32-63 Multi-Position Tandem Air Cylinder SCT63X25X125
The SCT63X25X125 is a tandem double-acting cylinder that provides four fixed rod positions: fully retracted (0 mm), 25 mm, 125 mm, and the total travel of 150 mm. Each 63 mm bore piston section generates 1559 N of push force at 0.5 MPa, rising to 2805 N at 0.9 MPa, making it suitable for sorting or diverting tasks that require two distinct forward stop points.
This tie-rod cylinder uses a 20 mm diameter piston rod with an M16x1.5 thread and PT1/4 ports. The adjustable air cushion at each end has a 28 mm length, and the body length A(SCT) is 249 mm, ensuring smooth deceleration across all four position stops.
Airtac SCT32-63 Multi-Position Tandem Air Cylinder SCT63X25X125 Technical Specifications
| Model | Airtac SCT32-63 Multi-Position Tandem Air Cylinder SCT63X25X125 |
|---|---|
| Series | SCT multi-position tie-rod cylinder |
| Bore size | Ø63 mm |
| Stroke 1 / Stroke 2 | 25 / 125 mm |
| Total travel | 150 mm |
| Stop positions | 4 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 (4)
| Position | Rod extension |
|---|---|
| P0 (retracted) | 0 mm |
| P1 (section 1) | 25 mm |
| P2 (section 2) | 125 mm |
| P3 (both extended) | 150 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 SCT63X25X125
| SCT | Multi-position (tandem) tie-rod cylinder series. |
|---|---|
| 63 | Bore size in mm (SCT range 32–100). |
| ×25 | Stroke 1 (section 1) in mm. |
| ×125 | 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 SCT63X25X125 Is Used
Two-Way Part Diverting
Use the 25 mm stroke to push a part onto a primary conveyor lane and the 125 mm stroke to divert it to a secondary lane, all from one compact actuator.
Two-Depth Pressing
Achieve a shallow 25 mm pre-press depth followed by a full 125 mm insertion stroke for assembly operations requiring staged force application.
Multi-Stop Feeding
Index a workpiece carrier to a 25 mm inspection station and then advance it a further 100 mm to a 150 mm total travel pick-and-place position.
Is the Airtac SCT32-63 Multi-Position Tandem Air Cylinder SCT63X25X125 the Right Cylinder?
Choose the SCT63X25X125 when a single actuator must index between two different extended positions without the complexity of two separate cylinders and external hard stops. The 25 mm and 125 mm strokes provide a short precise advance and a longer secondary feed. If the 1559 N per-section push force at 0.5 MPa is insufficient, stepping up to the 80 mm bore provides 2513 N per section; for a lighter load, the 50 mm bore offers 982 N.
For replacement, match the 63 mm bore, both the 25 mm and 125 mm strokes, PT port thread, and basic mounting. If the application involves a long dwell at the 125 mm or 150 mm position under a vertical load, an external rod lock or pilot-operated check valve is required, as the air cushion does not hold the load when pressure is removed.
Multi-position checklist
- ✓ Need 4 repeatable stops?
- ✓ Section strokes 25 + 125 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 SCT63X25X125 FAQ
It provides four discrete mechanical stops: 0 mm (fully retracted), 25 mm, 125 mm, and the total extended length of 150 mm. The positions are achieved by pressurizing the first section, the second section, or both simultaneously.
Each of the two piston sections delivers 1559 N of push force and 1402 N of pull force when operated at 0.5 MPa. The force does not double; each section independently provides this thrust for its respective stroke segment.
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