Airtac SCT32-63 Multi-Position Tandem Air Cylinder SCT63X70X30S
The AirTAC Airtac SCT32-63 Multi-Position Tandem Air Cylinder SCT63X70X30S is a genuine double-acting MULTI-POSITION (tandem) air cylinder: two piston sections of 70mm and 30mm give 4 controllable stop positions across a 100mm total travel, with a Ø63mm bore, PT1/4 ports and adjustable end cushioning.
- BoreØ63 mm
- Stroke 170 mm
- Stroke 230 mm
- Total travel100 mm
- Positions4 stops
- Port sizePT1/4
About the Airtac SCT32-63 Multi-Position Tandem Air Cylinder SCT63X70X30S
The SCT63X70X30S is a double-acting multi-position tandem cylinder that delivers four fixed rod positions: fully retracted (0 mm), 30 mm, 70 mm, and the total travel of 100 mm. Each piston section generates a push force of 1559 N at 0.5 MPa, making it suitable for sorting or diverting tasks requiring two distinct intermediate stops. The built-in magnet allows direct mounting of CMSG or DMSG sensors for reliable end-of-stroke detection.
With a 20 mm diameter rod and PT1/4 ports, this tie-rod cylinder features a 28 mm adjustable air cushion on each section to manage end-of-stroke deceleration. The body length A(SCT) is 249 mm plus the combined stroke, offering a compact tandem solution. Operating pressure ranges from 0.15 to 1.0 MPa, with a maximum push thrust of 2805 N per section at 0.9 MPa.
Airtac SCT32-63 Multi-Position Tandem Air Cylinder SCT63X70X30S Technical Specifications
| Model | Airtac SCT32-63 Multi-Position Tandem Air Cylinder SCT63X70X30S |
|---|---|
| Series | SCT multi-position tie-rod cylinder |
| Bore size | Ø63 mm |
| Stroke 1 / Stroke 2 | 70 / 30 mm |
| Total travel | 100 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) | 70 mm |
| P2 (section 2) | 30 mm |
| P3 (both extended) | 100 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 SCT63X70X30S
| SCT | Multi-position (tandem) tie-rod cylinder series. |
|---|---|
| 63 | Bore size in mm (SCT range 32–100). |
| ×70 | Stroke 1 (section 1) in mm. |
| ×30 | 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 SCT63X70X30S Is Used
Two-Stage Part Diverter
Uses the 30 mm and 70 mm stops to route parts to three different conveyor lanes from a single infeed point, simplifying line design.
Multi-Depth Pressing
Provides two controlled pressing depths at 30 mm and 70 mm for assembly operations requiring a partial insert followed by a full seat.
Sequential Gate Control
Operates a gate with a 30 mm cracking position for small items and a full 100 mm opening for larger pallets, all from one cylinder.
Is the Airtac SCT32-63 Multi-Position Tandem Air Cylinder SCT63X70X30S the Right Cylinder?
Choose the SCT63X70X30S when a single actuator must achieve four discrete stop positions without the complexity of two separate cylinders and external hard stops. The 70 mm and 30 mm strokes provide an asymmetric position set ideal for two-step feeding or ejection. If higher force is required, consider stepping up to the 80 mm bore, which delivers 2513 N of push per section at 0.5 MPa. For a lighter load, the 50 mm bore offers 982 N.
This model is a direct replacement for another AirTAC SCT63X70X30S with a magnet and PT threads. Ensure the replacement matches the bore, both stroke lengths (70 mm and 30 mm), and the -S magnet option for sensor compatibility. For strokes where the rod extends beyond 300 mm in total, assess the application for potential side loading and consider adding an external guide or rod support to prevent bending.
Multi-position checklist
- ✓ Need 4 repeatable stops?
- ✓ Section strokes 70 + 30 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 SCT63X70X30S FAQ
This tandem cylinder provides 4 discrete mechanical stops. The rod positions are 0 mm (fully retracted), 30 mm, 70 mm, and the total extended length of 100 mm. These are fixed by the two stroke sections and are not infinitely adjustable.
No. Like all standard pneumatic cylinders, the SCT does not lock or hold its position upon loss of air pressure. The piston will drift if the load is not balanced. To securely hold a load at an intermediate stop, you must add an external rod lock or a pilot-operated check valve to trap air in the pressurized section.
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