Airtac SCT32-63 Multi-Position Tandem Air Cylinder SCT50X40X3S
The AirTAC Airtac SCT32-63 Multi-Position Tandem Air Cylinder SCT50X40X3S is a genuine double-acting MULTI-POSITION (tandem) air cylinder: two piston sections of 40mm and 3mm give 4 controllable stop positions across a 43mm total travel, with a Ø50mm bore, PT1/4 ports and adjustable end cushioning.
- BoreØ50 mm
- Stroke 140 mm
- Stroke 23 mm
- Total travel43 mm
- Positions4 stops
- Port sizePT1/4
About the Airtac SCT32-63 Multi-Position Tandem Air Cylinder SCT50X40X3S
The SCT50X40X3S is a double-acting multi-position cylinder that delivers four distinct rod positions from its tandem piston layout: fully retracted (0 mm), 3 mm, 40 mm, and the combined total travel of 43 mm. Each 50 mm bore section generates a push force of 982 N at 0.5 MPa, rising to 1767 N at the maximum operating pressure of 0.9 MPa, driven through a rigid 20 mm diameter piston rod.
This model includes a built-in magnet (-S suffix), allowing direct mounting of CMSG, DMSG, or EMSG sensors on the tie-rod barrel for non-contact position sensing. The cylinder body has an A-length of 243 mm and uses PT1/4 ports with an M16x1.5 rod thread. Adjustable pneumatic cushioning at both ends, with a 21 mm cushion length, ensures smooth deceleration across the 30-800 mm/s speed range.
Airtac SCT32-63 Multi-Position Tandem Air Cylinder SCT50X40X3S Technical Specifications
| Model | Airtac SCT32-63 Multi-Position Tandem Air Cylinder SCT50X40X3S |
|---|---|
| Series | SCT multi-position tie-rod cylinder |
| Bore size | Ø50 mm |
| Stroke 1 / Stroke 2 | 40 / 3 mm |
| Total travel | 43 mm |
| Stop positions | 4 positions |
| Acting type | Double acting (tandem, multi-position) |
| Port size | PT1/4 |
| Rod thread | M16×1.5 |
| 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) | 40 mm |
| P2 (section 2) | 3 mm |
| P3 (both extended) | 43 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 (Ø50mm)
| Pressure | Push force | Pull force |
|---|---|---|
| 0.5 MPa | 982 N | 825 N |
| 0.7 MPa | 1374 N | — |
| Max (@1.0 MPa) | 200 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 SCT50X40X3S
| SCT | Multi-position (tandem) tie-rod cylinder series. |
|---|---|
| 50 | Bore size in mm (SCT range 32–100). |
| ×40 | Stroke 1 (section 1) in mm. |
| ×3 | 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 SCT50X40X3S Is Used
Two-Depth Press Insertion
The 3 mm and 40 mm stops allow a press tool to first locate a component with a light 3 mm touch before executing the full 40 mm insertion stroke, protecting delicate parts from impact damage.
Dual-Stop Part Sorting
A diverter gate driven by this cylinder can move to a 3 mm bypass position for one product stream and a 40 mm position for another, enabling compact, high-speed lane sorting.
Calibrated Gap Setting
Use the precise 3 mm and 40 mm discrete stops to set two fixed nozzle-to-part distances in a dispensing or gluing station, ensuring repeatable bead profiles without manual adjustment.
Is the Airtac SCT32-63 Multi-Position Tandem Air Cylinder SCT50X40X3S the Right Cylinder?
Selecting the SCT50X40X3S provides a compact solution for applications needing a short 3 mm positioning step alongside a longer 40 mm stroke, replacing the complexity of two separate cylinders and external hard stops. If higher force is required, stepping up to the 63 mm bore provides 1559 N of push per section at 0.5 MPa, while the 40 mm bore offers 628 N for lighter, faster moves. The built-in magnet simplifies adding end-of-stroke or mid-position confirmation without bulky external brackets.
For a direct replacement, match the 50 mm bore, the exact 40 mm and 3 mm stroke pair, PT port thread, and the -S magnet option. This basic mount configuration requires the cylinder body to be supported directly on the machine frame; consider adding an FA or LB mounting accessory if panel or foot mounting is preferred.
Multi-position checklist
- ✓ Need 4 repeatable stops?
- ✓ Section strokes 40 + 3 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 SCT50X40X3S FAQ
This tandem cylinder provides four discrete mechanical stops: 0 mm (fully retracted), 3 mm (section two extended), 40 mm (section one extended), and 43 mm (both sections extended, total travel). The positions are fixed by the two internal piston strokes and are not infinitely adjustable.
No, like all standard pneumatic cylinders, the SCT does not mechanically lock at any position. If air pressure is exhausted or a directional valve centers, the piston rod can drift or drop under load. A pilot-operated check valve or an external rod brake must be added to hold the load without live pressure.
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