Airtac SCT32-63 Multi-Position Tandem Air Cylinder SCT40X320X80S
The AirTAC Airtac SCT32-63 Multi-Position Tandem Air Cylinder SCT40X320X80S is a genuine double-acting MULTI-POSITION (tandem) air cylinder: two piston sections of 320mm and 80mm give 4 controllable stop positions across a 400mm total travel, with a Ø40mm bore, PT1/4 ports and adjustable end cushioning.
- BoreØ40 mm
- Stroke 1320 mm
- Stroke 280 mm
- Total travel400 mm
- Positions4 stops
- Port sizePT1/4
About the Airtac SCT32-63 Multi-Position Tandem Air Cylinder SCT40X320X80S
The SCT40X320X80S is a tandem multi-position cylinder that delivers four fixed rod positions—0 mm, 80 mm, 320 mm, and the full 400 mm travel—by pressurizing its two piston sections independently or together. Each section provides a push force of 628 N at 0.5 MPa (1130 N at 0.9 MPa), driven through a 16 mm diameter rod with PT1/4 ports.
This model includes a built-in magnet (-S suffix), allowing direct mounting of CMSG, DMSG, or EMSG sensors on the tie-rod barrel for reliable end-of-stroke or mid-position detection. The 320 mm stroke section requires attention to side-load alignment to prevent rod bending during extension.
Airtac SCT32-63 Multi-Position Tandem Air Cylinder SCT40X320X80S Technical Specifications
| Model | Airtac SCT32-63 Multi-Position Tandem Air Cylinder SCT40X320X80S |
|---|---|
| Series | SCT multi-position tie-rod cylinder |
| Bore size | Ø40 mm |
| Stroke 1 / Stroke 2 | 320 / 80 mm |
| Total travel | 400 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) | 320 mm |
| P2 (section 2) | 80 mm |
| P3 (both extended) | 400 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 SCT40X320X80S
| SCT | Multi-position (tandem) tie-rod cylinder series. |
|---|---|
| 40 | Bore size in mm (SCT range 32–100). |
| ×320 | Stroke 1 (section 1) in mm. |
| ×80 | 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 SCT40X320X80S Is Used
Two-Stage Part Diverting
Uses the 80 mm and 320 mm stops to route parts to two separate conveyor lanes from a single infeed point, with sensor confirmation at each position via the built-in magnet.
Dual-Depth Pressing
Provides a partial advance at 80 mm for a light pre-form operation and a full 320 mm stroke for the main press cycle, all within one compact tandem body.
Sequential Clamping
Applies a low-force clamp at the 80 mm position before engaging a high-force lock at 320 mm, with the 400 mm total travel used for part ejection.
Is the Airtac SCT32-63 Multi-Position Tandem Air Cylinder SCT40X320X80S the Right Cylinder?
Choose this four-position actuator when a process needs two distinct extended stops plus the retracted position, avoiding the complexity and air consumption of two separate cylinders with external hard stops. The 40 mm bore provides 628 N of push per section; if higher force is needed, stepping up to the 50 mm bore (SCT50) increases push to 982 N per section at the same 0.5 MPa pressure. For direct replacement, match the 40 mm bore, both strokes (320 mm and 80 mm), PT port thread, basic mounting, and the -S magnet option.
Multi-position checklist
- ✓ Need 4 repeatable stops?
- ✓ Section strokes 320 + 80 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 SCT40X320X80S FAQ
This tandem cylinder provides four discrete rod positions: 0 mm (fully retracted), 80 mm (section 2 extended), 320 mm (section 1 extended), and 400 mm (both sections extended, total travel).
Yes, if your application requires fixed stops at 80 mm and 320 mm. The SCT40X320X80S consolidates the function into one assembly, reducing mounting hardware and eliminating the need to synchronize two separate actuators, provided the per-section force of 628 N at 0.5 MPa is sufficient.
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