Airtac SCT32-63 Multi-Position Tandem Air Cylinder SCT63X30X20S
The AirTAC Airtac SCT32-63 Multi-Position Tandem Air Cylinder SCT63X30X20S is a genuine double-acting MULTI-POSITION (tandem) air cylinder: two piston sections of 30mm and 20mm give 4 controllable stop positions across a 50mm total travel, with a Ø63mm bore, PT1/4 ports and adjustable end cushioning.
- BoreØ63 mm
- Stroke 130 mm
- Stroke 220 mm
- Total travel50 mm
- Positions4 stops
- Port sizePT1/4
About the Airtac SCT32-63 Multi-Position Tandem Air Cylinder SCT63X30X20S
The SCT63X30X20S is a tandem multi-position cylinder that provides four fixed rod positions: fully retracted (0 mm), 30 mm, 20 mm, and the total travel of 50 mm. Each of its two 63 mm bore sections delivers 1559 N of push force at 0.5 MPa, making it suitable for sorting or diverting tasks that need distinct, repeatable stops without complex servo controls.
This model includes a built-in magnet (-S suffix), allowing CMSG, DMSG, or EMSG sensors to clamp directly onto the tie-rod barrel for position feedback. The 20 mm diameter rod and 28 mm adjustable air cushion at each end ensure smooth deceleration, while the PT1/4 ports keep connections compact. The body length A(SCT) is 249 mm.
Airtac SCT32-63 Multi-Position Tandem Air Cylinder SCT63X30X20S Technical Specifications
| Model | Airtac SCT32-63 Multi-Position Tandem Air Cylinder SCT63X30X20S |
|---|---|
| Series | SCT multi-position tie-rod cylinder |
| Bore size | Ø63 mm |
| Stroke 1 / Stroke 2 | 30 / 20 mm |
| Total travel | 50 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) | 20 mm |
| P3 (both extended) | 50 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 SCT63X30X20S
| SCT | Multi-position (tandem) tie-rod cylinder series. |
|---|---|
| 63 | Bore size in mm (SCT range 32–100). |
| ×30 | Stroke 1 (section 1) in mm. |
| ×20 | 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 SCT63X30X20S Is Used
Two-Way Part Diverting
Use the 30 mm and 50 mm extended positions to guide parts onto two different conveyor lanes from a single infeed point.
Multi-Level Stop Gate
The 20 mm and 50 mm stops can act as a two-height gate for controlling the flow of small boxes or pallets on a gravity roller line.
Two-Depth Press Feeding
Advance a tool to a 20 mm pre-press position and then to the full 50 mm depth, ensuring consistent part insertion in assembly fixtures.
Is the Airtac SCT32-63 Multi-Position Tandem Air Cylinder SCT63X30X20S the Right Cylinder?
Choose the SCT when your application requires two or more discrete stop positions from a single pneumatic axis, avoiding the cost and complexity of two separate cylinders with external hard stops. For higher force at the same pressure, step up to the 80 mm bore SCT, which provides 2513 N of push per section at 0.5 MPa. A direct replacement must match the 63 mm bore, both 30 mm and 20 mm section strokes, PT thread, basic mounting, and the -S magnet option.
Multi-position checklist
- ✓ Need 4 repeatable stops?
- ✓ Section strokes 30 + 20 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 SCT63X30X20S FAQ
It provides four distinct rod positions: 0 mm (fully retracted), 30 mm (section 1 extended), 20 mm (section 2 extended), and 50 mm (both sections extended). The unequal strokes create four usable stops.
No, it cannot. Like all standard pneumatic cylinders, the piston will drift or drop if pressure is exhausted. To hold a load at one of the four positions without live air, you must add an external rod brake, a mechanical lock, or a pilot-operated check valve in the circuit.
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