Airtac SCT32-63 Multi-Position Tandem Air Cylinder SCT50X75X25S
The AirTAC Airtac SCT32-63 Multi-Position Tandem Air Cylinder SCT50X75X25S 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 SCT50X75X25S
The SCT50X75X25S is a double-acting multi-position cylinder that delivers four fixed rod positions from a single compact assembly: 0 mm (fully retracted), 25 mm, 75 mm, and the total travel of 100 mm. Each of the two piston sections generates 982 N of push force at 0.5 MPa, providing consistent thrust for sequencing tasks without the bulk of two separate actuators.
A built-in magnet is integrated into the 50 mm bore piston, allowing direct mounting of CMSG, DMSG, or EMSG sensors on the tie-rod barrel for reliable end-of-stroke or mid-position sensing. The 20 mm diameter rod and 21 mm adjustable air cushion at each end help manage kinetic energy, and the body length A is 243 mm.
Airtac SCT32-63 Multi-Position Tandem Air Cylinder SCT50X75X25S Technical Specifications
| Model | Airtac SCT32-63 Multi-Position Tandem Air Cylinder SCT50X75X25S |
|---|---|
| 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 SCT50X75X25S
| 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 SCT50X75X25S Is Used
Two-Stage Diverter Gate
Actuates a conveyor gate to three distinct positions—closed (0 mm), partial divert to lane A (25 mm), and full divert to lane B (75 mm)—using the 100 mm total travel as a fourth bypass position.
Multi-Depth Label Press
Applies labels at two different insertion depths on a single product. The 25 mm stroke positions the tamp head for shallow application, while the 75 mm stroke handles deep-cavity placement, with sensor feedback confirming each stop.
Sequential Clamping Fixture
Clamps a workpiece in two stages: a 25 mm low-force pre-clamp aligns the part, followed by a 75 mm full-clamp stroke. The integrated magnet signals the control system when each clamping position is reached.
Is the Airtac SCT32-63 Multi-Position Tandem Air Cylinder SCT50X75X25S the Right Cylinder?
Choose this 4-position configuration when your process needs a short 25 mm advance for one operation and a longer 75 mm stroke for another, all from a single cylinder. If the 982 N push per section is insufficient, stepping up to the 63 mm bore provides 1559 N per section at the same pressure. For replacement, match the 50 mm bore, both strokes (75 mm and 25 mm), PT port thread, basic mounting, and the -S magnet option to ensure sensor compatibility.
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 SCT50X75X25S FAQ
This model provides four discrete stop positions: 0 mm (fully retracted), 25 mm, 75 mm, and 100 mm (total travel). The positions are fixed by the two section strokes and are selected by pressurizing the appropriate cylinder ports.
No, the SCT cylinder does not mechanically lock at any position. If air pressure is exhausted or lost, the piston can drift. To hold a load at a mid-position without live pressure, you must add an external rod brake or a pilot-operated check valve in the circuit.
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