Airtac SCT32-63 Multi-Position Tandem Air Cylinder SCT40X50X25
The AirTAC Airtac SCT32-63 Multi-Position Tandem Air Cylinder SCT40X50X25 is a genuine double-acting MULTI-POSITION (tandem) air cylinder: two piston sections of 50mm and 25mm give 4 controllable stop positions across a 75mm total travel, with a Ø40mm bore, PT1/4 ports and adjustable end cushioning.
- BoreØ40 mm
- Stroke 150 mm
- Stroke 225 mm
- Total travel75 mm
- Positions4 stops
- Port sizePT1/4
About the Airtac SCT32-63 Multi-Position Tandem Air Cylinder SCT40X50X25
The SCT40X50X25 is a double-acting multi-position cylinder that delivers four fixed rod positions from its two tandem piston sections: 0 mm (fully retracted), 25 mm, 50 mm, and 75 mm (total travel). Each 40 mm bore section generates 628 N of push force at 0.5 MPa, making it suitable for compact machines needing multiple distinct end-points without servo control.
Built on a robust tie-rod design with a 16 mm diameter rod and PT1/4 ports, this cylinder includes a 21 mm adjustable air cushion in each section for smooth deceleration. The body length A(SCT) is 235 mm, providing a rigid platform for basic mounting. At the maximum operating pressure of 0.9 MPa, thrust per section reaches 1130 N.
Airtac SCT32-63 Multi-Position Tandem Air Cylinder SCT40X50X25 Technical Specifications
| Model | Airtac SCT32-63 Multi-Position Tandem Air Cylinder SCT40X50X25 |
|---|---|
| Series | SCT multi-position tie-rod cylinder |
| Bore size | Ø40 mm |
| Stroke 1 / Stroke 2 | 50 / 25 mm |
| Total travel | 75 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) | 50 mm |
| P2 (section 2) | 25 mm |
| P3 (both extended) | 75 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 SCT40X50X25
| SCT | Multi-position (tandem) tie-rod cylinder series. |
|---|---|
| 40 | Bore size in mm (SCT range 32–100). |
| ×50 | 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 SCT40X50X25 Is Used
Two-Stage Sorting Gate
Uses the 25 mm and 50 mm positions to divert packages to two separate conveyor lanes, with the 75 mm position acting as a third reject path.
Multi-Depth Insertion
Drives a tool to three distinct insertion depths (25, 50, 75 mm) for assembling components with stepped bores or multiple seating planes.
Sequential Clamping
Applies a light clamp at the 25 mm stroke, a full clamp at 50 mm, and a part-eject position at 75 mm in a single automated workholding cycle.
Is the Airtac SCT32-63 Multi-Position Tandem Air Cylinder SCT40X50X25 the Right Cylinder?
Select the SCT40X50X25 when your application requires four fixed stopping points along a 75 mm total stroke, eliminating the complexity of two separate cylinders and external hard stops. If higher force is needed, consider stepping up to the 50 mm bore SCT50X50X25, which provides 982 N of push force per section at 0.5 MPa. For a direct replacement, match the 40 mm bore, both 50 mm and 25 mm section strokes, PT port thread, and basic mounting style.
Note that the SCT is a tie-rod cylinder and is not dimensionally interchangeable with ISO 15552 profiles. Ensure the load is guided if side forces are present, as the tandem rod design is primarily intended for axial thrust.
Multi-position checklist
- ✓ Need 4 repeatable stops?
- ✓ Section strokes 50 + 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 SCT40X50X25 FAQ
It provides four discrete mechanical stops: 0 mm (fully retracted), 25 mm, 50 mm, and the total travel of 75 mm. These are achieved by pressurizing the first section, the second section, or both simultaneously.
No, the SCT does not have a mechanical lock or brake. If air pressure is exhausted or lost, the piston rod can drift or drop. To hold a load at a specific position without live pressure, you must add an external rod brake or a pilot-operated check valve.
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