Airtac SCT32-63 Multi-Position Tandem Air Cylinder SCT40X25X65
The AirTAC Airtac SCT32-63 Multi-Position Tandem Air Cylinder SCT40X25X65 is a genuine double-acting MULTI-POSITION (tandem) air cylinder: two piston sections of 25mm and 65mm give 4 controllable stop positions across a 90mm total travel, with a Ø40mm bore, PT1/4 ports and adjustable end cushioning.
- BoreØ40 mm
- Stroke 125 mm
- Stroke 265 mm
- Total travel90 mm
- Positions4 stops
- Port sizePT1/4
About the Airtac SCT32-63 Multi-Position Tandem Air Cylinder SCT40X25X65
The SCT40X25X65 is a tandem multi-position cylinder that provides four fixed rod positions: fully retracted (0 mm), 25 mm, 65 mm, and the combined total travel of 90 mm. Each 40 mm bore section generates 628 N of push force at 0.5 MPa, making it a compact solution for light sorting or diverting tasks that require more than two end-of-stroke locations.
Built on a durable tie-rod construction with a 16 mm diameter rod and M12x1.25 rod thread, this cylinder uses PT1/4 ports and features a 21 mm adjustable air cushion in each section for smooth deceleration. The body length A is 235 mm, and the unit operates reliably on filtered air from 0.15 to 1.0 MPa across a standard temperature range of -20 to +70 °C.
Airtac SCT32-63 Multi-Position Tandem Air Cylinder SCT40X25X65 Technical Specifications
| Model | Airtac SCT32-63 Multi-Position Tandem Air Cylinder SCT40X25X65 |
|---|---|
| Series | SCT multi-position tie-rod cylinder |
| Bore size | Ø40 mm |
| Stroke 1 / Stroke 2 | 25 / 65 mm |
| Total travel | 90 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) | 65 mm |
| P3 (both extended) | 90 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 SCT40X25X65
| SCT | Multi-position (tandem) tie-rod cylinder series. |
|---|---|
| 40 | Bore size in mm (SCT range 32–100). |
| ×25 | Stroke 1 (section 1) in mm. |
| ×65 | 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 SCT40X25X65 Is Used
Two-Way Part Diverting
Actuates a diverter gate to four distinct positions, routing parts to two separate lanes plus a neutral retracted position and a fourth bypass state at 90 mm total travel.
Multi-Depth Stop Gate
Provides three active stop heights (25 mm, 65 mm, 90 mm) for pallet or carton flow control in gravity conveyor sections, allowing sequenced release of different sized items.
Two-Stage Clamping Fixture
Offers a retracted position and three distinct clamping or pressing depths for assembly operations requiring different levels of engagement without changing tooling.
Is the Airtac SCT32-63 Multi-Position Tandem Air Cylinder SCT40X25X65 the Right Cylinder?
Choose the SCT tandem cylinder when a single actuator must reach multiple discrete positions without the complexity of two separate cylinders and external hard stops. This 40 mm bore model suits moderate force requirements; if you need higher thrust, stepping up to the 50 mm bore provides 982 N of push per section at 0.5 MPa. For a direct replacement, match the 40 mm bore, the 25 mm and 65 mm section strokes, PT port thread, and basic mounting configuration.
With a combined stroke of 90 mm, rod deflection is minimal under axial loads, but always ensure the load is guided if any significant side force is present to prevent premature seal and bearing wear on the 16 mm rod.
Multi-position checklist
- ✓ Need 4 repeatable stops?
- ✓ Section strokes 25 + 65 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 SCT40X25X65 FAQ
This tandem cylinder provides 4 discrete rod positions: 0 mm (fully retracted), 25 mm, 65 mm, and the combined total of 90 mm. The positions are achieved by pressurizing the first section, the second section, or both simultaneously.
Yes, in applications requiring fixed intermediate stops. The SCT40X25X65 integrates two piston sections on a common rod, giving you 25 mm and 65 mm strokes from a single, compact body. A direct replacement must match the 40 mm bore, both 25 mm and 65 mm strokes, PT ports, and the basic mounting style.
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