Airtac SCT32-63 Multi-Position Tandem Air Cylinder SCT50X75X25
The AirTAC Airtac SCT32-63 Multi-Position Tandem Air Cylinder SCT50X75X25 is a genuine double-acting MULTI-POSITION (tandem) air cylinder: two piston sections of 75mm and 25mm give 4 controllable stop positions across a 100mm total travel, with a Ø50mm bore, PT1/4 ports and adjustable end cushioning.
- BoreØ50 mm
- Stroke 175 mm
- Stroke 225 mm
- Total travel100 mm
- Positions4 stops
- Port sizePT1/4
About the Airtac SCT32-63 Multi-Position Tandem Air Cylinder SCT50X75X25
The SCT50X75X25 tandem cylinder delivers four fixed rod positions—0 mm, 25 mm, 75 mm, and 100 mm—by pressurising one or both 50 mm bore sections. Each actuated section generates 982 N of push force at 0.5 MPa, rising to 1767 N at the maximum operating pressure of 0.9 MPa, making it suitable for multi-step clamping or sorting tasks.
This double-acting unit uses a 20 mm diameter rod with M16x1.5 threads and PT1/4 ports. The integrated adjustable air cushion on each end softens the piston deceleration over a 21 mm cushion length, and the tie-rod body has an A(SCT) dimension of 243 mm, providing a rigid frame for inline mounting.
Airtac SCT32-63 Multi-Position Tandem Air Cylinder SCT50X75X25 Technical Specifications
| Model | Airtac SCT32-63 Multi-Position Tandem Air Cylinder SCT50X75X25 |
|---|---|
| Series | SCT multi-position tie-rod cylinder |
| Bore size | Ø50 mm |
| Stroke 1 / Stroke 2 | 75 / 25 mm |
| Total travel | 100 mm |
| Stop positions | 4 positions |
| Acting type | Double acting (tandem, multi-position) |
| Port size | PT1/4 |
| Rod thread | M16×1.5 |
| 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) | 75 mm |
| P2 (section 2) | 25 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 (Ø50mm)
| Pressure | Push force | Pull force |
|---|---|---|
| 0.5 MPa | 982 N | 825 N |
| 0.7 MPa | 1374 N | — |
| Max (@1.0 MPa) | 200 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 SCT50X75X25
| SCT | Multi-position (tandem) tie-rod cylinder series. |
|---|---|
| 50 | Bore size in mm (SCT range 32–100). |
| ×75 | 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 SCT50X75X25 Is Used
Two-Depth Pressing
Achieve a partial press at 25 mm for locating and a full-depth press at 100 mm for final assembly, all with a single compact actuator.
Asymmetric Sorting Gate
Use the 0, 25, 75, and 100 mm positions to route packages to four different chutes based on height or destination code.
Multi-Step Clamping
Apply a light clamp at the 75 mm position for delicate parts and a full-force clamp at the 100 mm extended position for rigid workpieces.
Is the Airtac SCT32-63 Multi-Position Tandem Air Cylinder SCT50X75X25 the Right Cylinder?
Choose the SCT50X75X25 when an application needs four distinct linear stops without the complexity of two separate cylinders and external hard stops. The 75 mm and 25 mm strokes create an asymmetric position set ideal for a two-depth pressing or a diverter gate with unequal travel legs. If higher force is needed, stepping up to the 63 mm bore provides 1559 N push per section at 0.5 MPa, while the 40 mm bore offers 628 N for lighter, faster cycles.
For replacement, match the 50 mm bore, both the 75 mm and 25 mm strokes, PT port thread, and the basic mounting configuration. The cylinder is a direct drop-in for another AirTAC SCT50X75X25 of the same specification.
Multi-position checklist
- ✓ Need 4 repeatable stops?
- ✓ Section strokes 75 + 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 SCT50X75X25 FAQ
The four discrete rod positions are 0 mm (fully retracted), 25 mm (section two extended), 75 mm (section one extended), and 100 mm (both sections extended). These are fixed mechanical stops, not programmable positions.
No, this cylinder does not have a mechanical lock. If the directional valve centers or supply pressure drops, the piston can drift. To hold a load at any intermediate position without live pressure, you must add an external rod brake or a pilot-operated check valve.
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