Airtac SCT32-63 Multi-Position Tandem Air Cylinder SCT40X125X50S
The AirTAC Airtac SCT32-63 Multi-Position Tandem Air Cylinder SCT40X125X50S is a genuine double-acting MULTI-POSITION (tandem) air cylinder: two piston sections of 125mm and 50mm give 4 controllable stop positions across a 175mm total travel, with a Ø40mm bore, PT1/4 ports and adjustable end cushioning.
- BoreØ40 mm
- Stroke 1125 mm
- Stroke 250 mm
- Total travel175 mm
- Positions4 stops
- Port sizePT1/4
About the Airtac SCT32-63 Multi-Position Tandem Air Cylinder SCT40X125X50S
The AirTAC SCT40X125X50S multi-position cylinder delivers four distinct, repeatable rod stops—0 mm, 50 mm, 125 mm, and the full 175 mm total travel—from a single tie-rod body. Its tandem architecture uses two independently pressurised 40 mm bore sections, each providing 628 N of push force at 0.5 MPa, making it ideal for diverting parts or selecting between two feed depths without needing dual actuators.
This model includes a built-in magnet (-S suffix), allowing CMSG, DMSG, or EMSG sensors to clamp directly onto the barrel for contactless position sensing. The 16 mm diameter rod and PT1/4 ports handle flow efficiently, while the 21 mm adjustable air cushion in each section decelerates the load smoothly. At the maximum operating pressure of 0.9 MPa, a single section generates 1130 N of thrust.
Airtac SCT32-63 Multi-Position Tandem Air Cylinder SCT40X125X50S Technical Specifications
| Model | Airtac SCT32-63 Multi-Position Tandem Air Cylinder SCT40X125X50S |
|---|---|
| Series | SCT multi-position tie-rod cylinder |
| Bore size | Ø40 mm |
| Stroke 1 / Stroke 2 | 125 / 50 mm |
| Total travel | 175 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) | 125 mm |
| P2 (section 2) | 50 mm |
| P3 (both extended) | 175 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 SCT40X125X50S
| SCT | Multi-position (tandem) tie-rod cylinder series. |
|---|---|
| 40 | Bore size in mm (SCT range 32–100). |
| ×125 | Stroke 1 (section 1) in mm. |
| ×50 | 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 SCT40X125X50S Is Used
Two-Way Part Diverting
Use the 50 mm and 175 mm extended positions to route products onto two separate conveyor lanes from a single infeed point.
Dual-Depth Pressing
Actuate to the 125 mm stop for a shallow forming operation, then pressurise both sections to reach 175 mm for a deeper secondary form.
Multi-Stop Gate Control
Control a material gate with four distinct openings—fully closed (0 mm), 50 mm for fine material, 125 mm for coarse, and 175 mm for full flow.
Is the Airtac SCT32-63 Multi-Position Tandem Air Cylinder SCT40X125X50S the Right Cylinder?
Choose the SCT when a process needs two fixed intermediate positions rather than just end-of-stroke stops; it eliminates the cost and complexity of mounting two separate cylinders with external hard stops. For this 40 mm bore, the per-section push force is 628 N at 0.5 MPa. If your load requires roughly 50% more force, stepping up to the 50 mm bore (SCT50, 982 N push at 0.5 MPa) is a direct path. A direct replacement must match the 40 mm bore, both 125 mm and 50 mm strokes, PT port thread, and the -S magnet option. Because the first stroke is 125 mm, ensure the rod is guided if side loads are present to prevent bending.
Multi-position checklist
- ✓ Need 4 repeatable stops?
- ✓ Section strokes 125 + 50 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 SCT40X125X50S FAQ
It provides four discrete mechanical stops: 0 mm (fully retracted), 50 mm (stroke 2 extended), 125 mm (stroke 1 extended), and 175 mm (both strokes extended). It is not a servo cylinder and cannot stop at arbitrary points between these fixed positions.
No. Like all standard pneumatic cylinders, the SCT40X125X50S will drift or drop if air pressure is exhausted or lost. To lock the rod at a specific stop without live pressure, you must add an external rod brake or a pilot-operated check valve.
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