Airtac SCT32-63 Multi-Position Tandem Air Cylinder SCT40X25X75
The AirTAC Airtac SCT32-63 Multi-Position Tandem Air Cylinder SCT40X25X75 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 SCT40X25X75
The AirTAC SCT40X25X75 is a double-acting tandem cylinder delivering four fixed rod positions: fully retracted (0 mm), 25 mm, 75 mm, and the combined total travel of 100 mm. Each of its two piston sections generates a push force of 628 N at 0.5 MPa, driven through a 16 mm diameter rod. The body length A(SCT) is 235 mm, and the adjustable air cushion is 21 mm long.
This genuine AirTAC multi-position unit uses PT1/4 ports and an M12x1.25 rod thread. It is a practical alternative to complex setups with two separate cylinders and external stops when you need three intermediate positions in a compact, tie-rod design. The standard TPU seals suit operating temperatures from -20 to +70 °C.
Airtac SCT32-63 Multi-Position Tandem Air Cylinder SCT40X25X75 Technical Specifications
| Model | Airtac SCT32-63 Multi-Position Tandem Air Cylinder SCT40X25X75 |
|---|---|
| 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 SCT40X25X75
| 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 SCT40X25X75 Is Used
Two-Stage Sorting Gate
Operates a diverter gate with a partial-open position at 25 mm for small items and a full-open position at 75 mm for large packages, with a 100 mm total travel for clearing jams.
Multi-Depth Labeling
Positions a tamp pad at two different heights (25 mm and 75 mm) to apply labels on stepped product surfaces, using the 0 mm and 100 mm positions for retraction and reach.
Selective Part Ejection
Drives a pneumatic plunger to three depths for ejecting parts into different bins based on a quality check, using the 25 mm, 75 mm, and 100 mm stop positions.
Is the Airtac SCT32-63 Multi-Position Tandem Air Cylinder SCT40X25X75 the Right Cylinder?
Select the SCT40X25X75 when your application requires four distinct stopping points along a 100 mm stroke. It outperforms using two individual cylinders by eliminating the need for external brackets and alignment, ensuring the 25 mm and 75 mm positions are mechanically fixed. For higher force requirements, consider stepping up to the 50 mm bore, which provides 982 N of push per section at the same pressure. Ensure the replacement matches the 40 mm bore, both the 25 mm and 75 mm strokes, and the PT port thread.
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 SCT40X25X75 FAQ
It provides four distinct mechanical stop positions: 0 mm (fully retracted), 25 mm (first section extended), 75 mm (second section extended), and 100 mm (both sections extended for total travel).
Yes, it is a direct tandem replacement that provides the same three intermediate stop positions without the alignment complexity. The replacement must match the 40 mm bore, the 25 mm and 75 mm stroke combination, and the PT port thread.
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Standard models usually ship in 3-4 days.
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