Airtac SCT32-63 Multi-Position Tandem Air Cylinder SCT40X25X75S
The AirTAC Airtac SCT32-63 Multi-Position Tandem Air Cylinder SCT40X25X75S 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 Ø40mm bore, PT1/4 ports and adjustable end cushioning.
- BoreØ40 mm
- Stroke 125 mm
- Stroke 275 mm
- Total travel100 mm
- Positions4 stops
- Port sizePT1/4
About the Airtac SCT32-63 Multi-Position Tandem Air Cylinder SCT40X25X75S
The SCT40X25X75S is a tandem multi-position cylinder that provides four distinct rod positions: fully retracted (0 mm), 25 mm, 75 mm, and the total travel of 100 mm. By pressurising one or both of its 40 mm bore sections, you select the required stop without external hard stops or complex servo controls. Each actuated section generates 628 N of push force at 0.5 MPa, rising to 1130 N at 0.9 MPa, making it suitable for light sorting and diverting tasks.
This model includes a built-in magnet (-S suffix), allowing CMSG, DMSG, or EMSG sensors to clamp directly onto the tie-rod barrel for reliable end-of-stroke or mid-position sensing. The 16 mm diameter piston rod and PT1/4 ports keep the design compact, while the 21 mm adjustable air cushion at each end section helps manage kinetic energy. The body length A(SCT) is 235 mm, providing a clear reference for space planning.
Airtac SCT32-63 Multi-Position Tandem Air Cylinder SCT40X25X75S Technical Specifications
| Model | Airtac SCT32-63 Multi-Position Tandem Air Cylinder SCT40X25X75S |
|---|---|
| Series | SCT multi-position tie-rod cylinder |
| Bore size | Ø40 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 | PT1/4 |
| 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) | 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 (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 SCT40X25X75S
| SCT | Multi-position (tandem) tie-rod cylinder series. |
|---|---|
| 40 | 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 SCT40X25X75S Is Used
Two-Way Part Diverting
Use the 25 mm and 75 mm stops to guide small packages onto two separate conveyor lanes from a single infeed point.
Multi-Depth Label Application
Apply labels at two different heights on a product by stopping the tamp pad at 25 mm for a recessed surface and 100 mm for a flush surface.
Staged Component Feeding
Advance a part first by 25 mm for an inspection step, then extend to 100 mm total travel to push it into the next assembly nest.
Is the Airtac SCT32-63 Multi-Position Tandem Air Cylinder SCT40X25X75S the Right Cylinder?
Choose the SCT when a single actuator must stop at multiple fixed points without the cost and complexity of two separate cylinders. This 40 mm bore unit suits light automation; if you need more force, stepping up to the 50 mm bore (SCT50) provides 982 N of push per section at 0.5 MPa. For a drop-in replacement, match the bore (40 mm), both strokes (25 mm and 75 mm), the PT port thread, and the built-in magnet (-S). The basic mounting configuration allows direct body mounting or adding FA/FB flanges later.
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 SCT40X25X75S FAQ
This tandem cylinder provides four discrete mechanical stops: 0 mm (fully retracted), 25 mm (section 1 extended), 75 mm (section 2 extended), and 100 mm (both sections extended, total travel).
No. Like all standard pneumatic cylinders, the SCT does not lock its position when air is exhausted. If the load must be held at an intermediate stop without live pressure, you must add an external rod brake or a pilot-operated check valve.
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