Airtac SCT32-63 Multi-Position Tandem Air Cylinder SCT32X25X75
The AirTAC Airtac SCT32-63 Multi-Position Tandem Air Cylinder SCT32X25X75 is a genuine double-acting MULTI-POSITION (tandem) air cylinder: two piston sections of 25mm and 75mm give 4 controllable stop positions across a 100mm total travel, with a Ø32mm bore, PT1/8 ports and adjustable end cushioning.
- BoreØ32 mm
- Stroke 125 mm
- Stroke 275 mm
- Total travel100 mm
- Positions4 stops
- Port sizePT1/8
About the Airtac SCT32-63 Multi-Position Tandem Air Cylinder SCT32X25X75
The SCT32X25X75 is a compact multi-position tandem cylinder that provides four fixed rod positions: fully retracted (0 mm), 25 mm, 75 mm, and the total extended length of 100 mm. Each piston section generates 402 N of push force at 0.5 MPa, making it a precise actuator for light-duty sorting and diverting tasks where a standard cylinder would require complex external stops.
Built on a rugged tie-rod design with a 12 mm diameter rod and M10x1.25 rod thread, this cylinder features PT1/8 ports and a 21 mm adjustable air cushion in each section for smooth deceleration. The body length A(SCT) is 233 mm, offering a space-efficient solution for machinery requiring multiple fixed stopping points without the cost and complexity of servo systems.
Airtac SCT32-63 Multi-Position Tandem Air Cylinder SCT32X25X75 Technical Specifications
| Model | Airtac SCT32-63 Multi-Position Tandem Air Cylinder SCT32X25X75 |
|---|---|
| Series | SCT multi-position tie-rod cylinder |
| Bore size | Ø32 mm |
| Stroke 1 / Stroke 2 | 25 / 75 mm |
| Total travel | 100 mm |
| Stop positions | 4 positions |
| Acting type | Double acting (tandem, multi-position) |
| Port size | PT1/8 |
| Rod thread | M10×1.25 |
| 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 (4)
| Position | Rod extension |
|---|---|
| P0 (retracted) | 0 mm |
| P1 (section 1) | 25 mm |
| P2 (section 2) | 75 mm |
| P3 (both extended) | 100 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 (Ø32mm)
| Pressure | Push force | Pull force |
|---|---|---|
| 0.5 MPa | 402 N | 346 N |
| 0.7 MPa | 563 N | — |
| Max (@1.0 MPa) | 82 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 SCT32X25X75
| SCT | Multi-position (tandem) tie-rod cylinder series. |
|---|---|
| 32 | Bore size in mm (SCT range 32–100). |
| ×25 | Stroke 1 (section 1) in mm. |
| ×75 | 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 SCT32X25X75 Is Used
Two-Way Part Diverting
Use the four positions to direct parts from a single infeed conveyor to two separate outfeed lanes. The 25 mm and 75 mm stops can align a diverter gate precisely for each destination.
Multi-Depth Stop Gate
Control the flow of small components with a gate that has a closed position (0 mm), a partial-open gap (25 mm), a full-open gap (75 mm), and a fully retracted clearing position (100 mm).
Two-Stage Clamping Fixture
Apply a light pre-clamp force at the 25 mm position and a full clamping force at the 75 mm position. The 402 N per-section push force is ideal for holding delicate assemblies during bonding.
Is the Airtac SCT32-63 Multi-Position Tandem Air Cylinder SCT32X25X75 the Right Cylinder?
Choose the SCT32X25X75 when your application needs four distinct, repeatable stopping positions without the expense of a servo axis. This tandem unit replaces two separate cylinders and external hard stops, simplifying pneumatic circuit design and reducing overall footprint. If higher force is required, consider stepping up to the 40 mm bore SCT, which provides 628 N of push per section at the same 0.5 MPa pressure.
For a direct replacement, match the 32 mm bore, the exact 25 mm and 75 mm strokes, PT port thread, and basic mounting configuration. Always verify that the total travel of 100 mm meets your machine's stroke requirements, as the discrete stop positions are fixed by the two section strokes.
Multi-position checklist
- ✓ Need 4 repeatable stops?
- ✓ Section strokes 25 + 75 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 SCT32X25X75 FAQ
This tandem cylinder provides four discrete rod positions: 0 mm (fully retracted), 25 mm (first section extended), 75 mm (second section extended), and 100 mm (both sections extended). You select the position by pressurizing the appropriate combination of the two cylinder sections.
The SCT32X25X75 does not double the force. Each piston section independently produces the standard force for a 32 mm bore—402 N push and 345 N pull at 0.5 MPa. The advantage is achieving multiple fixed positions from a single, compact actuator body, not a combined force output.
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