Airtac SCT32-63 Multi-Position Tandem Air Cylinder SCT40X12X12
The AirTAC Airtac SCT32-63 Multi-Position Tandem Air Cylinder SCT40X12X12 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 SCT40X12X12
The SCT40X12X12 is a tandem multi-position pneumatic cylinder that delivers three precise, repeatable stop positions along its 24 mm total stroke. By pressurising either or both of its two 12 mm piston sections, the rod locates at 0 mm (fully retracted), 12 mm, or 24 mm (fully extended), making it ideal for short-throw sorting or diverting tasks. Each section provides a push force of 628 N at 0.5 MPa, driven through a 16 mm diameter piston rod.
This 40 mm bore tie-rod cylinder uses PT1/4 ports and features an adjustable air cushion with a 21 mm cushion length to decelerate the load smoothly at end of travel. The body length A(SCT) is a compact 235 mm. Note that the 12 mm section strokes are non-standard, made-to-order lengths, confirming this unit is built for a very specific, short-stroke multi-stop application.
Airtac SCT32-63 Multi-Position Tandem Air Cylinder SCT40X12X12 Technical Specifications
| Model | Airtac SCT32-63 Multi-Position Tandem Air Cylinder SCT40X12X12 |
|---|---|
| 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 SCT40X12X12
| 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 SCT40X12X12 Is Used
Miniature Part Diverting
Uses the three fixed positions (0, 12, 24 mm) to guide small components down different chutes or lanes on a high-speed assembly line.
Two-Stage Eject Mechanism
Provides a partial advance to 12 mm for inspection, then a full 24 mm stroke to eject a part, all from a single compact cylinder body.
Short-Throw Stamping
Delivers two distinct pressing depths in a confined space, using the 12 mm and 24 mm stops for a two-level forming or staking operation.
Is the Airtac SCT32-63 Multi-Position Tandem Air Cylinder SCT40X12X12 the Right Cylinder?
Select the SCT tandem cylinder when your machine needs two or three fixed stopping points from a single rod axis, avoiding the complexity and cost of two separate cylinders with external stops. For this 40 mm bore, the per-section push force is 628 N at 0.5 MPa. If your load requires more force, stepping up to a 50 mm bore SCT provides 982 N of push per section at the same pressure. To replace this exact model, match the 40 mm bore, both 12 mm strokes, PT port thread, and basic mounting configuration. A unit without a magnet sensor is specified here, but a -S variant is available if position feedback is needed.
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 SCT40X12X12 FAQ
This model provides 3 distinct stop positions because the two stroke sections are equal (12 mm each). The rod can be reliably positioned at 0 mm (fully retracted), 12 mm (first section extended), and 24 mm (both sections extended for total travel).
Yes, it is designed for that purpose. It replaces a dual-cylinder setup for two-position or three-position tasks, saving space and simplifying plumbing. Ensure the replacement matches the 40 mm bore, both 12 mm strokes, PT port thread, and basic mounting. The force output is per-section, not additive.
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