Airtac SCT32-63 Multi-Position Tandem Air Cylinder SCT40X10X390SH
The AirTAC Airtac SCT32-63 Multi-Position Tandem Air Cylinder SCT40X10X390SH is a genuine double-acting MULTI-POSITION (tandem) air cylinder: two piston sections of 10mm and 390mm give 4 controllable stop positions across a 400mm total travel, with a Ø40mm bore, PT1/4 ports and adjustable end cushioning.
- BoreØ40 mm
- Stroke 110 mm
- Stroke 2390 mm
- Total travel400 mm
- Positions4 stops
- Port sizePT1/4
About the Airtac SCT32-63 Multi-Position Tandem Air Cylinder SCT40X10X390SH
The SCT40X10X390SH is a tandem multi-position cylinder that delivers four distinct rod stops: 0 mm (home), 10 mm, 390 mm, and a full 400 mm total travel. Each 40 mm bore section provides 628 N of push force at 0.5 MPa, with a 16 mm diameter piston rod and M12x1.25 rod-end threads for robust tooling attachment.
This variant is factory-equipped with a built-in magnet (S suffix) for direct mounting of CMSG/DMSG sensors and high-temperature Viton seals (H suffix), extending the operating range to 0–150 °C. The tie-rod body has a 21 mm adjustable air cushion and an A(SCT) length of 235 mm, making it suitable for hot-environment sorting or indexing where sensor feedback is critical.
Airtac SCT32-63 Multi-Position Tandem Air Cylinder SCT40X10X390SH Technical Specifications
| Model | Airtac SCT32-63 Multi-Position Tandem Air Cylinder SCT40X10X390SH |
|---|---|
| Series | SCT multi-position tie-rod cylinder |
| Bore size | Ø40 mm |
| Stroke 1 / Stroke 2 | 10 / 390 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) | 10 mm |
| P2 (section 2) | 390 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 SCT40X10X390SH
| SCT | Multi-position (tandem) tie-rod cylinder series. |
|---|---|
| 40 | Bore size in mm (SCT range 32–100). |
| ×10 | Stroke 1 (section 1) in mm. |
| ×390 | 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 SCT40X10X390SH Is Used
Hot-Environment Part Diverting
With Viton seals rated to 150°C, this cylinder reliably operates a four-position diverter gate on ovens or heated conveyor lines, directing parts to separate lanes at 0, 10, 390, and 400 mm.
Two-Depth Hot Pressing
Achieve a precise 10 mm pre-compression stop and a full 390 mm pressing stroke in a single actuator. The built-in magnet confirms each position, critical for consistent part quality in heated platen presses.
Multi-Stop Indexing Station
Use the four discrete positions to index a pallet through a multi-step assembly cell. Sensor feedback from the -S magnet confirms arrival at the 10 mm, 390 mm, and 400 mm stops before the next operation begins.
Is the Airtac SCT32-63 Multi-Position Tandem Air Cylinder SCT40X10X390SH the Right Cylinder?
This four-position unit replaces complex setups that would otherwise require two separate cylinders and external hard stops. When you need a very short first position (10 mm) and a long second travel (390 mm), the SCT tandem design keeps the overall envelope compact compared to a single long-stroke cylinder with an intermediate stop. If higher thrust is needed, stepping up to the 50 mm bore SCT50 series provides 982 N of push force per section at the same 0.5 MPa. For a direct replacement, match the 40 mm bore, both 10 mm and 390 mm strokes, the PT port thread, the built-in magnet, and the Viton seal specification. With a combined stroke of 400 mm, ensure the rod is adequately guided if the load applies significant side force to prevent buckling.
Multi-position checklist
- ✓ Need 4 repeatable stops?
- ✓ Section strokes 10 + 390 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 SCT40X10X390SH FAQ
This tandem cylinder provides four discrete rod positions: fully retracted (0 mm), the first section extended (10 mm), the second section extended (390 mm), and both sections extended for the total travel (400 mm). It is not infinitely adjustable; stops are fixed by the two stroke lengths.
No. Like all pneumatic cylinders, the SCT40X10X390SH will drift if air pressure is lost or the valve centers. The air cushion is for end-of-stroke deceleration, not position locking. To hold a load at the 10 mm or any intermediate stop without live pressure, you must add an external rod lock or a pilot-operated check valve.
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