Airtac SCT32-63 Multi-Position Tandem Air Cylinder SCT40X125X125S
The AirTAC Airtac SCT32-63 Multi-Position Tandem Air Cylinder SCT40X125X125S is a genuine double-acting MULTI-POSITION (tandem) air cylinder: two piston sections of 125mm and 125mm give 3 controllable stop positions across a 250mm total travel, with a Ø40mm bore, PT1/4 ports and adjustable end cushioning.
- BoreØ40 mm
- Stroke 1125 mm
- Stroke 2125 mm
- Total travel250 mm
- Positions3 stops
- Port sizePT1/4
About the Airtac SCT32-63 Multi-Position Tandem Air Cylinder SCT40X125X125S
The SCT40X125X125S is a double-acting, multi-position tandem cylinder that delivers three fixed rod positions: fully retracted (0 mm), an intermediate stop at 125 mm, and full extension at 250 mm. By pressurizing the two 40 mm bore sections independently or together, you gain simple, repeatable discrete positioning without complex servo controls. Each piston section provides 628 N of push force at 0.5 MPa, rising to 1130 N at the maximum operating pressure of 0.9 MPa.
This model includes a built-in magnet (-S suffix), allowing CMSG, DMSG, or EMSG sensors to clamp directly onto the tie-rod barrel for reliable end-of-stroke or mid-position sensing. The 16 mm diameter piston rod and PT1/4 ports are standard for the 40 mm bore, while the 21 mm adjustable air cushion at each end decelerates the load smoothly. The body length A(SCT) is 235 mm, making it a compact solution for multi-stop tasks.
Airtac SCT32-63 Multi-Position Tandem Air Cylinder SCT40X125X125S Technical Specifications
| Model | Airtac SCT32-63 Multi-Position Tandem Air Cylinder SCT40X125X125S |
|---|---|
| Series | SCT multi-position tie-rod cylinder |
| Bore size | Ø40 mm |
| Stroke 1 / Stroke 2 | 125 / 125 mm |
| Total travel | 250 mm |
| Stop positions | 3 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 (3)
| Position | Rod extension |
|---|---|
| P0 (retracted) | 0 mm |
| P1 (section 1) | 125 mm |
| P2 (both extended) | 250 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 SCT40X125X125S
| SCT | Multi-position (tandem) tie-rod cylinder series. |
|---|---|
| 40 | Bore size in mm (SCT range 32–100). |
| ×125 | 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 SCT40X125X125S Is Used
Two-Position Diverter Gate
Actuate a gate to three distinct positions—closed, divert to lane A at 125 mm, and divert to lane B at 250 mm—for sorting packages on a conveyor line.
Multi-Level Part Staging
Stop a workpiece carrier at an intermediate inspection station (125 mm) and a final assembly station (250 mm) in a single linear move, reducing cycle time.
Two-Depth Pressing Operation
Use the 125 mm stroke for a pre-forming press action and the full 250 mm extension for the final coining stroke, ensuring consistent depth control for each stage.
Is the Airtac SCT32-63 Multi-Position Tandem Air Cylinder SCT40X125X125S the Right Cylinder?
Choose the SCT tandem cylinder when your application requires two or three repeatable mechanical stops without the cost and complexity of two separate cylinders and external brackets. For the 40 mm bore, each section delivers 628 N of push force at 0.5 MPa. If you need more force, stepping up to the 50 mm bore (SCT50) provides 982 N per section. A direct replacement must match the 40 mm bore, both 125 mm strokes, PT port thread, and the -S magnet option. Since the total stroke is 250 mm, ensure the rod is adequately guided if significant side loads are present.
Multi-position checklist
- ✓ Need 3 repeatable stops?
- ✓ Section strokes 125 + 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 SCT40X125X125S FAQ
This tandem cylinder provides 3 discrete mechanical stops. The rod positions are 0 mm (fully retracted), 125 mm (first section extended), and 250 mm (both sections extended, total stroke). The positions are achieved by pressurizing the individual cylinder sections.
Yes, if your sequence requires fixed stops at 0, 125, and 250 mm. The SCT40X125X125S integrates both strokes on one common rod line, which saves space and eliminates the need to synchronize two separate cylinders. Ensure the replacement matches the 40 mm bore, PT ports, and the -S magnet if you are using sensors.
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