Airtac SCT32-63 Multi-Position Tandem Air Cylinder SCT40X25X125S
The AirTAC Airtac SCT32-63 Multi-Position Tandem Air Cylinder SCT40X25X125S 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 Ø40mm bore, PT1/4 ports and adjustable end cushioning.
- BoreØ40 mm
- Stroke 125 mm
- Stroke 2125 mm
- Total travel150 mm
- Positions4 stops
- Port sizePT1/4
About the Airtac SCT32-63 Multi-Position Tandem Air Cylinder SCT40X25X125S
The SCT40X25X125S is a tandem multi-position cylinder that delivers four fixed rod positions: 0 mm (fully retracted), 25 mm, 125 mm, and 150 mm (total travel). Each of its two 40 mm bore sections generates a push force of 628 N at 0.5 MPa, making it suitable for light sorting and diverting tasks where a single actuator must serve multiple hard stops.
This model includes a built-in magnet (-S suffix), allowing CMSG, DMSG, or EMSG sensors to be clamped directly onto the tie-rod barrel for non-contact position confirmation. The 16 mm diameter rod and 21 mm adjustable air cushion at each end help manage end-of-stroke impact, while the PT1/4 ports and M12x1.25 rod thread keep it compatible with standard AirTAC fittings and rod-end accessories.
Airtac SCT32-63 Multi-Position Tandem Air Cylinder SCT40X25X125S Technical Specifications
| Model | Airtac SCT32-63 Multi-Position Tandem Air Cylinder SCT40X25X125S |
|---|---|
| Series | SCT multi-position tie-rod cylinder |
| Bore size | Ø40 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 | PT1/4 |
| 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) | 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 (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 SCT40X25X125S
| SCT | Multi-position (tandem) tie-rod cylinder series. |
|---|---|
| 40 | 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 SCT40X25X125S Is Used
Two-Way Part Sorting
Uses the 25 mm and 125 mm stops to divert parts into two separate lanes from a single conveyor, simplifying pneumatic control for light-weight items.
Dual-Depth Labeling
Applies labels at two different heights on a product. The 25 mm stroke handles shallow placements, while the 125 mm stroke reaches deeper recesses on the same assembly station.
Staged Clamping
Provides a light initial clamp at 25 mm for alignment, then a full-power clamp at 125 mm, all from one cylinder body, reducing fixture complexity.
Is the Airtac SCT32-63 Multi-Position Tandem Air Cylinder SCT40X25X125S the Right Cylinder?
Select the SCT40X25X125S when a single pneumatic circuit must reach two distinct extended positions without the complexity of two separate cylinders and external hard stops. The 25 mm and 125 mm strokes create a compact 150 mm total envelope, ideal for space-constrained multi-stop feeds. If you need more force per section, stepping up to the 50 mm bore provides 982 N of push at 0.5 MPa. For direct replacement, match the 40 mm bore, both 25 mm and 125 mm strokes, PT port thread, and the -S magnet option; this SCT cylinder is a tie-rod design and is not interchangeable with ISO 15552 profiles.
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 SCT40X25X125S FAQ
This tandem cylinder provides four discrete rod positions: 0 mm (fully retracted), 25 mm (first section extended), 125 mm (second section extended), and 150 mm (both sections extended). The positions are fixed by the two stroke lengths and are not infinitely adjustable.
Yes, the -S suffix indicates a built-in magnet, so you can mount CMSG reed switches or DMSG/EMSG solid-state sensors directly on the cylinder's tie-rod barrel to detect each of the four positions.
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