Airtac SCT32-63 Multi-Position Tandem Air Cylinder SCT63X50X25S
The AirTAC Airtac SCT32-63 Multi-Position Tandem Air Cylinder SCT63X50X25S 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 Ø63mm bore, PT1/4 ports and adjustable end cushioning.
- BoreØ63 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 SCT63X50X25S
The SCT63X50X25S is a double-acting multi-position cylinder that provides four fixed rod positions from two strokes on a single piston rod: fully retracted (0 mm), 25 mm, 50 mm, and the total extended travel of 75 mm. Each 63 mm bore section generates a push force of 1559 N at 0.5 MPa, rising to 2805 N at the maximum operating pressure of 0.9 MPa, making it a compact alternative to two separate actuators for sequenced stop-point tasks.
This model includes a built-in magnet, allowing CMSG, DMSG, or EMSG solid-state and reed sensors to be clamped directly onto the tie-rod barrel for non-contact position sensing. It features a 20 mm diameter piston rod, M16x1.5 rod thread, and PT1/4 ports with a 28 mm adjustable air cushion at each end. The SCT body length is 249 mm, and the unit is rated for an operating pressure of 0.15–1.0 MPa with standard TPU seals suitable for -20 to +70 °C.
Airtac SCT32-63 Multi-Position Tandem Air Cylinder SCT63X50X25S Technical Specifications
| Model | Airtac SCT32-63 Multi-Position Tandem Air Cylinder SCT63X50X25S |
|---|---|
| Series | SCT multi-position tie-rod cylinder |
| Bore size | Ø63 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 | 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, 28 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 (Ø63mm)
| Pressure | Push force | Pull force |
|---|---|---|
| 0.5 MPa | 1559 N | 1402 N |
| 0.7 MPa | 2182 N | — |
| Max (@1.0 MPa) | 318 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 SCT63X50X25S
| SCT | Multi-position (tandem) tie-rod cylinder series. |
|---|---|
| 63 | 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 SCT63X50X25S Is Used
Two-Stage Diverter Gate
Uses the 25 mm stroke to clear a gate from its seal and the full 75 mm travel to swing it into a second product lane, providing three distinct flow paths from one compact actuator.
Multi-Depth Pressing
Achieves a light contact at the 25 mm stop for positioning and a full 1559 N pressing force at the 50 mm position, with sensor confirmation at each step via the built-in magnet.
Sequenced Part Stops
Creates a 3-position stop gate on a conveyor: retracted to let parts pass, extended to 25 mm for small components, and fully extended to 75 mm to halt larger totes.
Is the Airtac SCT32-63 Multi-Position Tandem Air Cylinder SCT63X50X25S the Right Cylinder?
Choose the SCT tandem cylinder when an application demands up to four discrete mechanical stops without the complexity and plumbing of two independent cylinders and external hard stops. The 50 mm and 25 mm stroke combination is ideal for a two-step feed-and-clamp or a diverting gate with a short first move. If higher force is needed, stepping up to the SCT80 bore provides 2513 N of push per section at 0.5 MPa; for a lighter load, the SCT50 bore delivers 982 N.
For direct replacement, match the 63 mm bore, both strokes (50 mm and 25 mm), PT port thread, and the integrated magnet (-S suffix). This basic mounting version accepts standard SCT foot (LB), flange (FA/FB), or clevis (CA/CB) accessories. Note that the SCT is a tie-rod cylinder and does not interchange with ISO 15552 profiles.
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 SCT63X50X25S FAQ
Because the two strokes are different (50 mm and 25 mm), this cylinder provides four discrete mechanical stop positions: 0 mm (fully retracted), 25 mm (section 2 extended), 50 mm (section 1 extended), and 75 mm (both sections extended for total travel).
Yes, if your sequence requires fixed stops at 0, 25, 50, and 75 mm. The SCT63X50X25S integrates both strokes on one rod line, reducing mounting space and eliminating the need to synchronize two separate actuators. Ensure your replacement matches the PT1/4 ports and the magnet sensor option.
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