Airtac SCT32-63 Multi-Position Tandem Air Cylinder SCT32X25X50S
The AirTAC Airtac SCT32-63 Multi-Position Tandem Air Cylinder SCT32X25X50S is a genuine double-acting MULTI-POSITION (tandem) air cylinder: two piston sections of 25mm and 50mm give 4 controllable stop positions across a 75mm total travel, with a Ø32mm bore, PT1/8 ports and adjustable end cushioning.
- BoreØ32 mm
- Stroke 125 mm
- Stroke 250 mm
- Total travel75 mm
- Positions4 stops
- Port sizePT1/8
About the Airtac SCT32-63 Multi-Position Tandem Air Cylinder SCT32X25X50S
The SCT32X25X50S is a tie-rod multi-position cylinder that delivers four fixed rod positions—0, 25, 50, and 75 mm—by sequencing pressure to its two tandem piston sections. Each 32 mm bore section generates 402 N of push force at 0.5 MPa, making it a compact solution for light sorting or diverting tasks where multiple end-of-stroke locations are needed without external hard stops.
A built-in magnet is integrated into the piston, allowing CMSG, DMSG, or EMSG sensors to clamp directly onto the barrel for non-contact position sensing at each stop. The cylinder uses a 12 mm diameter rod with M10x1.25 threads and PT1/8 ports, and includes a 21 mm adjustable air cushion in each section to decelerate the load smoothly at every stroke end.
Airtac SCT32-63 Multi-Position Tandem Air Cylinder SCT32X25X50S Technical Specifications
| Model | Airtac SCT32-63 Multi-Position Tandem Air Cylinder SCT32X25X50S |
|---|---|
| Series | SCT multi-position tie-rod cylinder |
| Bore size | Ø32 mm |
| Stroke 1 / Stroke 2 | 25 / 50 mm |
| Total travel | 75 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) | 50 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 (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 SCT32X25X50S
| SCT | Multi-position (tandem) tie-rod cylinder series. |
|---|---|
| 32 | Bore size in mm (SCT range 32–100). |
| ×25 | Stroke 1 (section 1) in mm. |
| ×50 | 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 SCT32X25X50S Is Used
Multi-Chute Sorting Gate
Directs small packages to three separate conveyor lanes by stopping the rod at 25, 50, or 75 mm, each position aligning a diverter plate with a different chute.
Two-Depth Labeling Press
Applies labels at two different product heights in one cycle. The 25 mm stroke handles shallow trays, while the combined 75 mm stroke reaches deep cartons, with the 50 mm position used for a mid-height sensor check.
Staged Component Feed
Advances electronic components through a three-step inspection nest. The rod moves to 25 mm for vision check, 50 mm for continuity test, and 75 mm for the reject blow-off station.
Is the Airtac SCT32-63 Multi-Position Tandem Air Cylinder SCT32X25X50S the Right Cylinder?
Choose this 4-position model when your process requires three distinct extended stops (25, 50, and 75 mm) from a single compact actuator, eliminating the cost and complexity of two separate cylinders with external stoppers. If the 402 N push per section is marginal, stepping up to the 40 mm bore SCT provides 628 N per section at the same pressure. For replacement, match the bore, both strokes (25 and 50 mm), the PT port thread, and the -S magnet option to retain sensor feedback; this basic mount version drops into the same footprint as any SCT32X25X50S without additional brackets.
Multi-position checklist
- ✓ Need 4 repeatable stops?
- ✓ Section strokes 25 + 50 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 SCT32X25X50S FAQ
It provides four discrete mechanical stops: fully retracted (0 mm), section one extended (25 mm), section two extended (50 mm), and both sections extended (75 mm total travel). These are fixed by the two stroke lengths and are not infinitely adjustable.
No, like all standard pneumatic cylinders, the SCT32X25X50S will not hold position under a loss of pressure. The piston can drift or drop. If you need to lock the load at the 50 mm stop without live air, you must add an external rod brake or a pilot-operated check valve.
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