Airtac SCT32-63 Multi-Position Tandem Air Cylinder SCT63X30X25
The AirTAC Airtac SCT32-63 Multi-Position Tandem Air Cylinder SCT63X30X25 is a genuine double-acting MULTI-POSITION (tandem) air cylinder: two piston sections of 30mm and 25mm give 4 controllable stop positions across a 55mm total travel, with a Ø63mm bore, PT1/4 ports and adjustable end cushioning.
- BoreØ63 mm
- Stroke 130 mm
- Stroke 225 mm
- Total travel55 mm
- Positions4 stops
- Port sizePT1/4
About the Airtac SCT32-63 Multi-Position Tandem Air Cylinder SCT63X30X25
The SCT63X30X25 is a tandem multi-position cylinder that delivers four distinct rod positions from two strokes on a single piston rod line. By pressurising one or both of its 63 mm bore sections, you can stop the rod at 0 mm (fully retracted), 30 mm, 25 mm, or the total travel of 55 mm. Each actuated section generates a push force of 1559 N at 0.5 MPa, making it suitable for sorting or diverting tasks that require short, repeatable intermediate stops.
Built on a durable tie-rod design with a 20 mm diameter rod and M16x1.5 rod thread, this cylinder uses PT1/4 ports and features a 28 mm adjustable air cushion for smooth end-of-stroke deceleration. The body length A(SCT) is 249 mm, providing a compact footprint for machinery needing multiple fixed positions without the complexity of servo controls. It operates on filtered air from 0.15 to 1.0 MPa across a temperature range of -20 to +70 °C with its standard TPU seals.
Airtac SCT32-63 Multi-Position Tandem Air Cylinder SCT63X30X25 Technical Specifications
| Model | Airtac SCT32-63 Multi-Position Tandem Air Cylinder SCT63X30X25 |
|---|---|
| Series | SCT multi-position tie-rod cylinder |
| Bore size | Ø63 mm |
| Stroke 1 / Stroke 2 | 30 / 25 mm |
| Total travel | 55 mm |
| Stop positions | 4 positions |
| Acting type | Double acting (tandem, multi-position) |
| Port size | PT1/4 |
| Rod thread | M16×1.5 |
| 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, 28 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) | 30 mm |
| P2 (section 2) | 25 mm |
| P3 (both extended) | 55 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 (Ø63mm)
| Pressure | Push force | Pull force |
|---|---|---|
| 0.5 MPa | 1559 N | 1402 N |
| 0.7 MPa | 2182 N | — |
| Max (@1.0 MPa) | 318 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 SCT63X30X25
| SCT | Multi-position (tandem) tie-rod cylinder series. |
|---|---|
| 63 | Bore size in mm (SCT range 32–100). |
| ×30 | Stroke 1 (section 1) in mm. |
| ×25 | 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 SCT63X30X25 Is Used
Two-Way Part Diverting
Use the four discrete stops to guide parts into two separate lanes on a conveyor, with the 30 mm and 55 mm positions acting as the diverting gates.
Multi-Level Stamping
Apply two distinct pressing depths in a single cycle by stopping the rod at 25 mm for a pre-form operation and 55 mm for the final form, using the 1559 N push force.
Sequential Part Feeding
Advance a component through three precise stages—25 mm, 30 mm, and 55 mm—for assembly or inspection stations without needing a multi-axis servo system.
Is the Airtac SCT32-63 Multi-Position Tandem Air Cylinder SCT63X30X25 the Right Cylinder?
Choose the SCT63X30X25 when your application needs four fixed mechanical stops in a compact stroke range, eliminating the cost and tuning of two separate cylinders with external hard stops. If your force requirements are lower, stepping down to a 50 mm bore reduces the per-section push to 982 N at 0.5 MPa; for higher thrust, the 80 mm bore provides 2513 N. This model is a direct replacement for another AirTAC SCT63X30X25 with basic mounting, PT ports, and no magnet.
For strokes under 300 mm like this one, rod bending from side loads is generally not a primary concern, but ensure the load is guided if any lateral force is present to prevent premature seal wear on the 20 mm rod.
Multi-position checklist
- ✓ Need 4 repeatable stops?
- ✓ Section strokes 30 + 25 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 SCT63X30X25 FAQ
It provides four distinct mechanical stop positions because its two strokes are unequal. The rod can be positioned at 0 mm (fully retracted), 30 mm (first section extended), 25 mm (second section extended), and 55 mm (both sections extended for total travel).
Yes, if your sequence requires two fixed intermediate stops plus a retracted and fully extended position. The SCT63X30X25 integrates both strokes into one tie-rod body, saving mounting space and simplifying your pneumatic circuit. Ensure the replacement matches the 63 mm bore, 30 mm and 25 mm strokes, PT1/4 ports, and basic mounting.
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