Airtac SCT32-63 Multi-Position Tandem Air Cylinder SCT40X25X125
The AirTAC Airtac SCT32-63 Multi-Position Tandem Air Cylinder SCT40X25X125 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 Ø40mm bore, PT1/4 ports and adjustable end cushioning.
- BoreØ40 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 SCT40X25X125
The SCT40X25X125 is a tandem multi-position cylinder that delivers four fixed rod positions: fully retracted (0 mm), 25 mm, 125 mm, and the total travel of 150 mm. Each 40 mm bore section generates about 628 N of push force at 0.5 MPa, making it suitable for light sorting or diverting tasks where two distinct extended stops are needed.
Built on a durable tie-rod design with a 16 mm rod and PT1/4 ports, this cylinder includes an adjustable air cushion (21 mm length) to manage end-of-stroke deceleration. The body length A(SCT) is 235 mm, providing a compact footprint for multi-stop pneumatic circuits.
Airtac SCT32-63 Multi-Position Tandem Air Cylinder SCT40X25X125 Technical Specifications
| Model | Airtac SCT32-63 Multi-Position Tandem Air Cylinder SCT40X25X125 |
|---|---|
| Series | SCT multi-position tie-rod cylinder |
| Bore size | Ø40 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 | M12×1.25 |
| 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) | 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 (Ø40mm)
| Pressure | Push force | Pull force |
|---|---|---|
| 0.5 MPa | 628 N | 528 N |
| 0.7 MPa | 880 N | — |
| Max (@1.0 MPa) | 128 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 SCT40X25X125
| SCT | Multi-position (tandem) tie-rod cylinder series. |
|---|---|
| 40 | 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 SCT40X25X125 Is Used
Two-Way Part Diverting
Uses the 25 mm and 125 mm extended positions to guide parts down two different conveyor lanes, eliminating the need for a separate actuator at each divert point.
Multi-Depth Stop Gate
Provides a partial-open gate at 25 mm for small items and a full-open gate at 125 mm for larger packages, controlled by pressurizing the appropriate cylinder section.
Two-Stage Clamping Fixture
Advances a clamp pad to a pre-set 25 mm position for alignment, then to the full 125 mm stroke for final clamping force, all from one compact tandem unit.
Is the Airtac SCT32-63 Multi-Position Tandem Air Cylinder SCT40X25X125 the Right Cylinder?
Choose the SCT when your application needs two separate, repeatable extended positions without the complexity of two independent cylinders and external hard stops. If you require higher force, consider stepping up to the 50 mm bore SCT, which provides 982 N of push per section at the same 0.5 MPa pressure.
For a direct replacement, match the 40 mm bore, both strokes (25 mm and 125 mm), PT port thread, and basic mounting configuration. This model does not include a magnet; if sensor feedback is needed, select the -S variant.
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 SCT40X25X125 FAQ
This cylinder provides four discrete positions: 0 mm (fully retracted), 25 mm (section 1 extended), 125 mm (section 2 extended), and 150 mm (both sections extended). The stops are fixed by the two stroke lengths.
Yes, in applications requiring two distinct extended stops. The SCT40X25X125 consolidates the function into one body, saving space and simplifying plumbing. Ensure the bore, both strokes, and port thread (PT) match your existing setup.
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