Airtac SCT32-63 Multi-Position Tandem Air Cylinder SCT40X125X25S
The AirTAC Airtac SCT32-63 Multi-Position Tandem Air Cylinder SCT40X125X25S is a genuine double-acting MULTI-POSITION (tandem) air cylinder: two piston sections of 125mm and 25mm give 4 controllable stop positions across a 150mm total travel, with a Ø40mm bore, PT1/4 ports and adjustable end cushioning.
- BoreØ40 mm
- Stroke 1125 mm
- Stroke 225 mm
- Total travel150 mm
- Positions4 stops
- Port sizePT1/4
About the Airtac SCT32-63 Multi-Position Tandem Air Cylinder SCT40X125X25S
The SCT40X125X25S is a double-acting tandem cylinder that delivers four fixed rod positions from its two piston sections: 0 mm (fully retracted), 25 mm, 125 mm, and the combined 150 mm total travel. This specific model includes a built-in magnet, allowing direct mounting of CMSG/DMSG/EMSG sensors for reliable end-of-stroke or intermediate position detection without external brackets.
Each piston section generates 628 N of push force at 0.5 MPa (879 N at 0.7 MPa), driven through a 16 mm diameter rod. The body length A(SCT) is 235 mm, and the adjustable pneumatic cushion at each end is 21 mm long, providing smooth deceleration across the 30-800 mm/s speed range.
Airtac SCT32-63 Multi-Position Tandem Air Cylinder SCT40X125X25S Technical Specifications
| Model | Airtac SCT32-63 Multi-Position Tandem Air Cylinder SCT40X125X25S |
|---|---|
| Series | SCT multi-position tie-rod cylinder |
| Bore size | Ø40 mm |
| Stroke 1 / Stroke 2 | 125 / 25 mm |
| Total travel | 150 mm |
| Stop positions | 4 positions |
| Acting type | Double acting (tandem, multi-position) |
| Port size | PT1/4 |
| Rod thread | M12×1.25 |
| 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) | 125 mm |
| P2 (section 2) | 25 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 (Ø40mm)
| Pressure | Push force | Pull force |
|---|---|---|
| 0.5 MPa | 628 N | 528 N |
| 0.7 MPa | 880 N | — |
| Max (@1.0 MPa) | 128 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 SCT40X125X25S
| SCT | Multi-position (tandem) tie-rod cylinder series. |
|---|---|
| 40 | Bore size in mm (SCT range 32–100). |
| ×125 | 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 SCT40X125X25S Is Used
Two-Stage Part Diverting
Uses the 25 mm stroke for a primary gate and the 125 mm stroke for a secondary divert path, sorting parts to three lanes from one conveyor line.
Multi-Depth Clamping
Applies a light 25 mm clamp stroke for delicate positioning, then a full 125 mm stroke for high-force holding, all from one compact cylinder body.
Sequential Press Operations
Performs a short 25 mm pre-press or locate stroke followed by a 125 mm main pressing stroke, ensuring accurate alignment before full force is applied.
Is the Airtac SCT32-63 Multi-Position Tandem Air Cylinder SCT40X125X25S the Right Cylinder?
Choose the SCT40X125X25S when a single actuator must reach two distinct extended stops plus retracted, eliminating the complexity and plumbing of two separate cylinders with external hard stops. The 125 mm and 25 mm strokes create a 150 mm total reach. If your application needs higher force per section, stepping up to the 50 mm bore provides 982 N of push at 0.5 MPa. For a drop-in replacement, match the 40 mm bore, both 125 mm and 25 mm strokes, PT port threads, basic mounting, and the -S magnet suffix to preserve sensor compatibility.
Multi-position checklist
- ✓ Need 4 repeatable stops?
- ✓ Section strokes 125 + 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 SCT40X125X25S FAQ
This cylinder 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). These are fixed by the two stroke lengths and are not infinitely adjustable.
Yes, it is designed for that. A single SCT40X125X25S with its two built-in strokes replaces the need for two individual SC cylinders, mounting brackets, and external hard stops, simplifying the pneumatic circuit and reducing overall envelope space.
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