Airtac SCT32-63 Multi-Position Tandem Air Cylinder SCT40X12X12S
The AirTAC Airtac SCT32-63 Multi-Position Tandem Air Cylinder SCT40X12X12S is a genuine double-acting MULTI-POSITION (tandem) air cylinder: two piston sections of 12mm and 12mm give 3 controllable stop positions across a 24mm total travel, with a Ø40mm bore, PT1/4 ports and adjustable end cushioning.
- BoreØ40 mm
- Stroke 112 mm
- Stroke 212 mm
- Total travel24 mm
- Positions3 stops
- Port sizePT1/4
About the Airtac SCT32-63 Multi-Position Tandem Air Cylinder SCT40X12X12S
The SCT40X12X12 is a double-acting multi-position cylinder that delivers three fixed rod positions: 0 mm (fully retracted), 12 mm, and 24 mm (total travel). Each of the two tandem piston sections generates 628 N of push force and 528 N of pull force at 0.5 MPa, making it suitable for compact sorting or diverting tasks where short, repeatable strokes are essential. The 40 mm bore cylinder uses a 16 mm diameter rod and PT1/4 ports.
With a body length A(SCT) of 235 mm and an adjustable air cushion of 21 mm, this tie-rod cylinder decelerates the piston smoothly at each end of its travel. The standard TPU seals and PT threads keep it compatible with common pneumatic setups, while the operating pressure range of 0.15 to 1.0 MPa provides flexibility for light to moderate industrial applications.
Airtac SCT32-63 Multi-Position Tandem Air Cylinder SCT40X12X12S Technical Specifications
| Model | Airtac SCT32-63 Multi-Position Tandem Air Cylinder SCT40X12X12S |
|---|---|
| Series | SCT multi-position tie-rod cylinder |
| Bore size | Ø40 mm |
| Stroke 1 / Stroke 2 | 12 / 12 mm |
| Total travel | 24 mm |
| Stop positions | 3 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 (3)
| Position | Rod extension |
|---|---|
| P0 (retracted) | 0 mm |
| P1 (section 1) | 12 mm |
| P2 (both extended) | 24 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 SCT40X12X12S
| SCT | Multi-position (tandem) tie-rod cylinder series. |
|---|---|
| 40 | Bore size in mm (SCT range 32–100). |
| ×12 | Stroke 1 (section 1) in mm. |
| ×12 | 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 SCT40X12X12S Is Used
3-Position Diverter Gate
Uses the three discrete stops (0, 12, 24 mm) to route small parts between two conveyor lanes. The short 12 mm steps provide crisp, fast indexing for high-cycle diverting.
Two-Depth Pressing
Delivers a light touch at 12 mm extension and a full press at 24 mm. The 628 N per-section push force at 0.5 MPa handles consistent insertion or staking operations.
Multi-Stop Part Feeding
Advances components in precise 12 mm increments to a work station. The fixed mechanical stops ensure repeatable positioning without external sensors.
Is the Airtac SCT32-63 Multi-Position Tandem Air Cylinder SCT40X12X12S the Right Cylinder?
Select the SCT40X12X12 when your application needs two distinct extended positions without the complexity of mounting two separate cylinders. This tandem unit is more compact and ensures the rod line is shared, eliminating alignment issues between independent actuators. If your force requirement is lower, consider stepping down to the 32 mm bore, which provides 402 N of push force per section at 0.5 MPa. For a direct replacement, match the 40 mm bore, both 12 mm strokes, PT port thread, and basic mounting configuration.
Because both strokes are short (12 mm), side-loading and rod bending are minimal, allowing this cylinder to be used without an external guide in purely axial applications. Always ensure the load is aligned with the rod axis to prevent premature seal wear.
Multi-position checklist
- ✓ Need 3 repeatable stops?
- ✓ Section strokes 12 + 12 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 SCT40X12X12S FAQ
It provides 3 distinct mechanical stops: 0 mm (fully retracted), 12 mm (first section extended), and 24 mm (both sections extended). Because both strokes are equal, the mid-position at 12 mm is the only intermediate stop.
Yes, if your process requires two fixed stop positions at 12 mm and 24 mm. The SCT40X12X12 combines both strokes on a single rod line, saving space and eliminating the need to synchronize two actuators. Ensure the replacement matches the 40 mm bore, PT1/4 ports, and basic mounting.
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