Airtac SCT32-63 Multi-Position Tandem Air Cylinder SCT50X40X20S
The AirTAC Airtac SCT32-63 Multi-Position Tandem Air Cylinder SCT50X40X20S is a genuine double-acting MULTI-POSITION (tandem) air cylinder: two piston sections of 40mm and 20mm give 4 controllable stop positions across a 60mm total travel, with a Ø50mm bore, PT1/4 ports and adjustable end cushioning.
- BoreØ50 mm
- Stroke 140 mm
- Stroke 220 mm
- Total travel60 mm
- Positions4 stops
- Port sizePT1/4
About the Airtac SCT32-63 Multi-Position Tandem Air Cylinder SCT50X40X20S
The SCT50X40X20S is a 50 mm bore tandem multi-position cylinder that delivers four distinct rod positions from two unequal strokes: 0 mm (fully retracted), 40 mm, 20 mm, and the total travel of 60 mm. Each piston section provides a push force of 982 N at 0.5 MPa, making it suitable for diverting or sorting tasks that require two different intermediate stop points without complex external hard stops.
This model includes a built-in magnet (-S suffix), allowing standard CMSG, DMSG, or EMSG sensors to be clamped directly onto the tie-rod barrel for reliable end-of-stroke or mid-position sensing. The 20 mm diameter piston rod and 21 mm adjustable air cushion at each end ensure smooth deceleration, while the compact 243 mm body length (A dimension) simplifies machine integration.
Airtac SCT32-63 Multi-Position Tandem Air Cylinder SCT50X40X20S Technical Specifications
| Model | Airtac SCT32-63 Multi-Position Tandem Air Cylinder SCT50X40X20S |
|---|---|
| Series | SCT multi-position tie-rod cylinder |
| Bore size | Ø50 mm |
| Stroke 1 / Stroke 2 | 40 / 20 mm |
| Total travel | 60 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) | 20 mm |
| P3 (both extended) | 60 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 SCT50X40X20S
| SCT | Multi-position (tandem) tie-rod cylinder series. |
|---|---|
| 50 | Bore size in mm (SCT range 32–100). |
| ×40 | Stroke 1 (section 1) in mm. |
| ×20 | 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 SCT50X40X20S Is Used
Two-Stage Part Diverting
Uses the 20 mm and 40 mm stroke positions to route parts to two different conveyor lanes from a single infeed point, controlled by pressurizing the cylinder sections independently.
Multi-Depth Labeling
Provides two distinct pressing depths (20 mm and 40 mm) for applying labels or stamps to products at different heights on the same production line.
Sequential Clamping
Executes a two-step clamping operation: a light 20 mm approach stroke followed by a full 40 mm power stroke, all from one cylinder with sensor feedback at each position.
Is the Airtac SCT32-63 Multi-Position Tandem Air Cylinder SCT50X40X20S the Right Cylinder?
Choose the SCT50X40X20S when your application needs four fixed stopping positions from a single compact cylinder body, eliminating the cost and complexity of two separate actuators with external stops. The unequal strokes (40 mm and 20 mm) are ideal for two-step feeding or ejection sequences. If higher force is required, consider stepping up to the 63 mm bore SCT63 series, which provides 1559 N of push per section at 0.5 MPa. For a direct replacement, match the 50 mm bore, both strokes (40 mm and 20 mm), PT port thread, and the -S magnet option; the basic mounting style requires no additional brackets.
Multi-position checklist
- ✓ Need 4 repeatable stops?
- ✓ Section strokes 40 + 20 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 SCT50X40X20S FAQ
It has four discrete stopping positions: 0 mm (fully retracted), 40 mm (first section extended), 20 mm (second section extended), and 60 mm (both sections extended). The positions are fixed by the two stroke lengths and are not infinitely adjustable.
Yes, in applications requiring two different fixed stroke lengths from a single mounting point. The SCT50X40X20S provides 40 mm and 20 mm strokes in one body, saving space and plumbing. Ensure the per-section force of 982 N at 0.5 MPa meets your load requirements, as the force does not double when both sections are pressurized.
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