Airtac SCT32-63 Multi-Position Tandem Air Cylinder SCT32X25X125S
The AirTAC Airtac SCT32-63 Multi-Position Tandem Air Cylinder SCT32X25X125S is a genuine double-acting MULTI-POSITION (tandem) air cylinder: two piston sections of 25mm and 125mm give 4 controllable stop positions across a 150mm total travel, with a Ø32mm bore, PT1/8 ports and adjustable end cushioning.
- BoreØ32 mm
- Stroke 125 mm
- Stroke 2125 mm
- Total travel150 mm
- Positions4 stops
- Port sizePT1/8
About the Airtac SCT32-63 Multi-Position Tandem Air Cylinder SCT32X25X125S
The SCT32X25X125S is a tandem multi-position cylinder that delivers four fixed rod positions from two independent piston sections on a common rod line. With strokes of 25 mm and 125 mm, the reachable stops are 0 mm (fully retracted), 25 mm, 125 mm, and the total travel of 150 mm, giving machines a simple pneumatic solution for multi-stop sequencing without complex controls.
Each 32 mm bore section produces 402 N of push force at 0.5 MPa and up to 724 N at the maximum operating pressure of 0.9 MPa, driven through a 12 mm diameter rod. The built-in magnet (denoted by the -S suffix) allows direct mounting of CMSG, DMSG, or EMSG sensors on the tie-rod barrel for non-contact position feedback, and the standard PT1/8 ports with M10x1.25 rod thread keep the cylinder compatible with common pneumatic fittings.
Airtac SCT32-63 Multi-Position Tandem Air Cylinder SCT32X25X125S Technical Specifications
| Model | Airtac SCT32-63 Multi-Position Tandem Air Cylinder SCT32X25X125S |
|---|---|
| Series | SCT multi-position tie-rod cylinder |
| Bore size | Ø32 mm |
| Stroke 1 / Stroke 2 | 25 / 125 mm |
| Total travel | 150 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) | 125 mm |
| P3 (both extended) | 150 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 SCT32X25X125S
| SCT | Multi-position (tandem) tie-rod cylinder series. |
|---|---|
| 32 | Bore size in mm (SCT range 32–100). |
| ×25 | Stroke 1 (section 1) in mm. |
| ×125 | 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 SCT32X25X125S Is Used
Two-Way Diverter Gate
The four discrete positions (0, 25, 125, 150 mm) allow a single chute or gate to direct product flow to three different lanes, with the 25 mm stop providing a precise partial-open state for metering.
Multi-Depth Pressing
In light assembly, the 25 mm and 125 mm intermediate stops enable two distinct pressing depths from one actuator, while the full 150 mm travel handles part ejection, all controlled by pressurising the appropriate cylinder sections.
Staged Part Feeding
An escapement mechanism can use the 25 mm stop for singulation, the 125 mm stop for a partial advance, and the full 150 mm stroke for a complete transfer, reducing the need for multiple single-stroke cylinders in tight packaging machines.
Is the Airtac SCT32-63 Multi-Position Tandem Air Cylinder SCT32X25X125S the Right Cylinder?
Choose the SCT32X25X125S when a compact 32 mm bore tandem unit can replace two separate cylinders or an actuator with external hard stops, saving space and simplifying the valve arrangement. If the 402 N per-section push force at 0.5 MPa is marginal, stepping up to the 40 mm bore (SCT40) provides 628 N per section at the same pressure. For replacement, match the bore, both strokes (25 mm and 125 mm), the PT port thread, the basic mounting style, and the -S magnet option to ensure the sensor brackets align with the existing setup.
Multi-position checklist
- ✓ Need 4 repeatable stops?
- ✓ Section strokes 25 + 125 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 SCT32X25X125S FAQ
This model provides four discrete mechanical stop positions: 0 mm (fully retracted), 25 mm (first section extended), 125 mm (second section extended), and 150 mm (both sections extended, total travel). The stops are fixed by the two section strokes and are selected by pressurising section one, section two, or both simultaneously.
It can often replace two separate cylinders where the application requires two distinct extension lengths plus a combined full stroke, provided the rod alignment and mounting are compatible. The replacement must match the 32 mm bore, the 25 mm and 125 mm stroke combination, the PT port thread, and the -S magnet option if sensors are used. The mounting style (basic in this case) must also be verified against the existing bracket layout.
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