Airtac SCT32-63 Multi-Position Tandem Air Cylinder SCT40X70X50S
The AirTAC Airtac SCT32-63 Multi-Position Tandem Air Cylinder SCT40X70X50S is a genuine double-acting MULTI-POSITION (tandem) air cylinder: two piston sections of 70mm and 50mm give 4 controllable stop positions across a 120mm total travel, with a Ø40mm bore, PT1/4 ports and adjustable end cushioning.
- BoreØ40 mm
- Stroke 170 mm
- Stroke 250 mm
- Total travel120 mm
- Positions4 stops
- Port sizePT1/4
About the Airtac SCT32-63 Multi-Position Tandem Air Cylinder SCT40X70X50S
The SCT40X70X50S delivers four fixed rod positions—0 mm, 50 mm, 70 mm, and 120 mm total travel—by pressurising two 40 mm bore sections in sequence. Each section provides 628 N of push force at 0.5 MPa, and the 16 mm diameter rod with M12x1.25 threads handles light to medium multi-stop tasks without deflection.
A built-in magnet allows CMSG, DMSG, or EMSG sensors to clamp directly onto the tie-rod barrel for end-of-stroke or mid-position confirmation. The cylinder body length A(SCT) is 235 mm, and the 21 mm air cushion at each end absorbs energy quietly, making this unit a space-efficient alternative to two separate actuators for three-depth sorting or two-step clamping.
Airtac SCT32-63 Multi-Position Tandem Air Cylinder SCT40X70X50S Technical Specifications
| Model | Airtac SCT32-63 Multi-Position Tandem Air Cylinder SCT40X70X50S |
|---|---|
| Series | SCT multi-position tie-rod cylinder |
| Bore size | Ø40 mm |
| Stroke 1 / Stroke 2 | 70 / 50 mm |
| Total travel | 120 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) | 70 mm |
| P2 (section 2) | 50 mm |
| P3 (both extended) | 120 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 SCT40X70X50S
| SCT | Multi-position (tandem) tie-rod cylinder series. |
|---|---|
| 40 | Bore size in mm (SCT range 32–100). |
| ×70 | Stroke 1 (section 1) in mm. |
| ×50 | 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 SCT40X70X50S Is Used
3-Way Diverter Gate
Use the 0, 50, 70, and 120 mm positions to route packages to three separate conveyor lanes from a single infeed point, eliminating the need for two independent actuators.
Two-Depth Pressing Station
Set a partial insertion at 50 mm for pre-forming and a full insertion at 120 mm for final crimping. The 70 mm stop serves as an intermediate safety check position.
Multi-Stop Glue Dispensing
Move a nozzle to four precise heights for applying adhesive beads at different Z-levels on a stepped component. The built-in magnet confirms arrival at each discrete stop.
Is the Airtac SCT32-63 Multi-Position Tandem Air Cylinder SCT40X70X50S the Right Cylinder?
Choose this 4-position model when your process needs three distinct extended stops beyond the home position, such as a diverter gate with a partial-open bypass. The unequal strokes (70 mm and 50 mm) create four unique landing points, which would otherwise require two cylinders and a mechanical coupling. If you need higher force per section, step up to the 50 mm bore SCT50 series, which pushes 982 N at the same 0.5 MPa pressure.
For direct replacement, match the 40 mm bore, the exact 70 mm and 50 mm strokes, the PT port thread, and the built-in magnet (-S suffix). This basic configuration has no mounting bracket, so verify that your existing fixture uses the standard tie-rod end nuts. If a load must hold at the 50 mm or 70 mm mid-position without live air pressure, add an external rod lock or a pilot-operated check valve in the circuit.
Multi-position checklist
- ✓ Need 4 repeatable stops?
- ✓ Section strokes 70 + 50 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 SCT40X70X50S FAQ
It provides four discrete mechanical stops: 0 mm (fully retracted), 50 mm (section 2 extended), 70 mm (section 1 extended), and 120 mm (both sections extended). The positions are fixed by the two stroke lengths and are not infinitely adjustable.
No. Like all standard pneumatic cylinders, the SCT40X70X50S will drift or drop if pressure is exhausted. To hold a load at a mid-position without live pressure, you must add an external rod brake, a mechanical lock, or a pilot-operated check valve.
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