Airtac SCT32-63 Multi-Position Tandem Air Cylinder SCT32X25X75S
The AirTAC Airtac SCT32-63 Multi-Position Tandem Air Cylinder SCT32X25X75S 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 Ø32mm bore, PT1/8 ports and adjustable end cushioning.
- BoreØ32 mm
- Stroke 125 mm
- Stroke 275 mm
- Total travel100 mm
- Positions4 stops
- Port sizePT1/8
About the Airtac SCT32-63 Multi-Position Tandem Air Cylinder SCT32X25X75S
The SCT32X25X75S is a compact tandem cylinder that delivers four defined rod positions—0 mm, 25 mm, 75 mm, and the full 100 mm total travel—from a single tie-rod body. A built-in magnet (-S suffix) allows direct mounting of CMSG/DMSG/EMSG sensors for position feedback without external brackets.
Each of the two 32 mm bore sections generates 402 N of push force at 0.5 MPa, rising to 724 N at the 0.9 MPa maximum operating pressure. The 12 mm diameter rod, PT1/8 ports, and 21 mm adjustable air cushion at each end provide reliable cycling in sorting and diverting tasks where space is limited.
Airtac SCT32-63 Multi-Position Tandem Air Cylinder SCT32X25X75S Technical Specifications
| Model | Airtac SCT32-63 Multi-Position Tandem Air Cylinder SCT32X25X75S |
|---|---|
| Series | SCT multi-position tie-rod cylinder |
| Bore size | Ø32 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 | PT1/8 |
| Rod thread | M10×1.25 |
| 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 (Ø32mm)
| Pressure | Push force | Pull force |
|---|---|---|
| 0.5 MPa | 402 N | 346 N |
| 0.7 MPa | 563 N | — |
| Max (@1.0 MPa) | 82 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 SCT32X25X75S
| SCT | Multi-position (tandem) tie-rod cylinder series. |
|---|---|
| 32 | 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 SCT32X25X75S Is Used
Two-Station Diverter Gate
Uses the four positions to route packages to three separate conveyor lanes. The magnet sensors confirm each stop, preventing collisions in high-speed sortation.
Multi-Depth Label Applicator
Stops at 25 mm and 75 mm apply labels at two different heights on a product, while the 100 mm position clears the applicator head for the next cycle.
Offset Component Insertion
Positions a small gripper at 0 mm for pick, 25 mm for pre-insertion alignment, and 75 mm for final press-fit, with the 100 mm stroke used for part ejection.
Is the Airtac SCT32-63 Multi-Position Tandem Air Cylinder SCT32X25X75S the Right Cylinder?
Select this SCT when your sequence needs four distinct stop points but you want to avoid the complexity of two separate cylinders and external hard stops. The 25 mm and 75 mm stroke combination creates an asymmetric position set ideal for two-step feeding or offset placement. If higher force is required, step up to the SCT40 series, where each section provides 628 N push at 0.5 MPa.
For a direct replacement, match the 32 mm bore, both the 25 mm and 75 mm strokes, PT port thread, basic mounting, and the -S magnet option. The SCT is a tie-rod design; do not substitute an ISO 15552 cylinder, as the body length and mounting interfaces differ.
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 SCT32X25X75S FAQ
It provides four discrete mechanical stops: fully retracted (0 mm), first section extended (25 mm), second section extended (75 mm), and both sections extended for the total travel of 100 mm. The stops are fixed by the two stroke lengths and are not infinitely variable.
No. Like any standard pneumatic cylinder, the SCT32X25X75S will drift or drop if pressure is lost or the directional valve is centered. If you need to hold a load at an intermediate position without live air pressure, you must add an external rod lock or a pilot-operated check valve.
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