Airtac SCT32-63 Multi-Position Tandem Air Cylinder SCT63X25X25SN
The AirTAC Airtac SCT32-63 Multi-Position Tandem Air Cylinder SCT63X25X25SN 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 SCT63X25X25SN
The SCT63X25X25SN is a double-acting multi-position pneumatic cylinder that provides three precise mechanical stops along its travel: fully retracted (0 mm), the first 25 mm stroke, and the combined 50 mm total extension. Each of the two tandem piston sections delivers a push force of 1559 N at 0.5 MPa, scaling up to 2805 N at the maximum operating pressure of 0.9 MPa, driven through a rigid 20 mm diameter piston rod.
This model is factory-equipped with a built-in magnet (-S suffix) for direct mounting of CMSG/DMSG/EMSG sensors to confirm position, and NBR seals (-N suffix) for consistent performance with standard lubricated air. The tie-rod construction includes a 28 mm adjustable air cushion in each section, and the body has an A(SCT) dimension of 249 mm, making it a compact solution for 3-position sorting or diverting tasks.
Airtac SCT32-63 Multi-Position Tandem Air Cylinder SCT63X25X25SN Technical Specifications
| Model | Airtac SCT32-63 Multi-Position Tandem Air Cylinder SCT63X25X25SN |
|---|---|
| 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 SCT63X25X25SN
| 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 SCT63X25X25SN Is Used
3-Position Diverter Gate
Uses the retracted, 25 mm, and 50 mm stops to route packages to three separate conveyor lanes from a single infeed point. The magnet sensors confirm each discrete position before the next cycle starts.
Two-Stage Part Ejection
Operates a pusher blade to a pre-eject position at 25 mm for verification, then extends fully to 50 mm to clear the part. The NBR seals provide reliable cycling on a standard factory air supply.
Multi-Depth Clamping Fixture
Provides two distinct clamping pressures or depths on a workpiece. The first 25 mm stroke applies a light hold, while the full 50 mm stroke engages a high-force clamp, with 1559 N of push available per section.
Is the Airtac SCT32-63 Multi-Position Tandem Air Cylinder SCT63X25X25SN the Right Cylinder?
Choose the SCT63X25X25SN when your application requires a three-position actuator without the complexity of two separate cylinders and external hard stops. The 25 mm strokes per section create defined intermediate and full-extension positions, ideal for gates or flaps with two active states. If you need more force in the same 63 mm bore, stepping up to an SCT80 bore provides 2513 N of push per section at 0.5 MPa, though the body length increases to 296 mm.
For a drop-in replacement, match the 63 mm bore, both 25 mm strokes, PT port thread, the basic mounting style, and the integrated magnet. Note that the NBR seal material is specified here; ensure the replacement matches this if the environment uses standard lubricated compressed air.
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 SCT63X25X25SN FAQ
This model provides 3 distinct mechanical stop positions because both piston 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).
No, an SCT cylinder does not lock or hold its position when air pressure is exhausted or lost. The piston will drift. If you must hold a load at the 25 mm stop without live pressure, you need an external rod brake, a mechanical lock, or a pilot-operated check valve in the circuit.
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