Airtac SCT32-63 Multi-Position Tandem Air Cylinder SCT40X25X50S
The AirTAC Airtac SCT32-63 Multi-Position Tandem Air Cylinder SCT40X25X50S is a genuine double-acting MULTI-POSITION (tandem) air cylinder: two piston sections of 25mm and 50mm give 4 controllable stop positions across a 75mm total travel, with a Ø40mm bore, PT1/4 ports and adjustable end cushioning.
- BoreØ40 mm
- Stroke 125 mm
- Stroke 250 mm
- Total travel75 mm
- Positions4 stops
- Port sizePT1/4
About the Airtac SCT32-63 Multi-Position Tandem Air Cylinder SCT40X25X50S
The SCT40X25X50S is a tandem multi-position cylinder that delivers four fixed rod positions—0 mm, 25 mm, 50 mm, and the combined 75 mm total travel—by pressurising its two piston sections independently or together. Each section provides 628 N of push force at 0.5 MPa (1130 N at 0.9 MPa), driven by a 16 mm diameter rod through PT1/4 ports.
This model includes a built-in magnet (-S suffix), allowing direct mounting of CMSG, DMSG, or EMSG sensors along the tie-rod barrel for non-contact position feedback. The adjustable air cushion at each end (21 mm length) ensures smooth deceleration, making it well-suited for compact sorting or diverting tasks where distinct stop points are required.
Airtac SCT32-63 Multi-Position Tandem Air Cylinder SCT40X25X50S Technical Specifications
| Model | Airtac SCT32-63 Multi-Position Tandem Air Cylinder SCT40X25X50S |
|---|---|
| Series | SCT multi-position tie-rod cylinder |
| Bore size | Ø40 mm |
| Stroke 1 / Stroke 2 | 25 / 50 mm |
| Total travel | 75 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) | 25 mm |
| P2 (section 2) | 50 mm |
| P3 (both extended) | 75 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 SCT40X25X50S
| SCT | Multi-position (tandem) tie-rod cylinder series. |
|---|---|
| 40 | Bore size in mm (SCT range 32–100). |
| ×25 | 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 SCT40X25X50S Is Used
Two-Way Diverter Gate
Actuates a flap to three distinct angles—closed (0 mm), partial divert (25 mm), and full divert (75 mm)—routing packages on a conveyor line without needing multiple actuators.
Multi-Depth Insertion
Pushes components to two different insertion depths (25 mm and 50 mm) in an assembly fixture, with the 75 mm position used for part ejection, all from one compact cylinder.
Staged Clamping
Provides a light pre-clamp at 25 mm stroke and full clamping force at 75 mm total travel, protecting delicate parts during a two-step machining operation.
Is the Airtac SCT32-63 Multi-Position Tandem Air Cylinder SCT40X25X50S the Right Cylinder?
Choose the SCT tandem cylinder when your application needs up to four defined mechanical stops without the complexity of two separate cylinders and external hard stops. For higher thrust at each position, consider stepping up to the 50 mm bore SCT50 series, which provides 982 N of push force per section at 0.5 MPa. When replacing an existing unit, match the 40 mm bore, both strokes (25 mm and 50 mm), the PT port thread, the built-in magnet, and the basic mounting style to ensure a direct physical and functional swap.
Multi-position checklist
- ✓ Need 4 repeatable stops?
- ✓ Section strokes 25 + 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 SCT40X25X50S FAQ
This model provides four discrete mechanical stop positions: fully retracted (0 mm), first section extended (25 mm), second section extended (50 mm), and both sections extended for full travel (75 mm).
Yes, in many cases. The SCT40X25X50S integrates two strokes into one tandem body, saving space and eliminating the need to synchronise two separate actuators. Ensure the combined envelope and the four fixed positions match your sequence requirements.
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