Airtac SCT32-63 Multi-Position Tandem Air Cylinder SCT63X50X250S
The AirTAC Airtac SCT32-63 Multi-Position Tandem Air Cylinder SCT63X50X250S is a genuine double-acting MULTI-POSITION (tandem) air cylinder: two piston sections of 50mm and 250mm give 4 controllable stop positions across a 300mm total travel, with a Ø63mm bore, PT1/4 ports and adjustable end cushioning.
- BoreØ63 mm
- Stroke 150 mm
- Stroke 2250 mm
- Total travel300 mm
- Positions4 stops
- Port sizePT1/4
About the Airtac SCT32-63 Multi-Position Tandem Air Cylinder SCT63X50X250S
The SCT63X50X250S is a double-acting, multi-position tandem cylinder that delivers four fixed rod positions from two independent piston sections on a common rod line. By pressurising the sections individually or together, the rod stops precisely at 0 mm (fully retracted), 50 mm, 250 mm, or the combined total travel of 300 mm. Each 63 mm bore section generates 1559 N of push force at 0.5 MPa, rising to 2805 N at the maximum operating pressure of 0.9 MPa, making it a robust actuator for sequenced, multi-stop workflows.
This model includes a built-in magnet (-S suffix), allowing direct clamping of CMSG, DMSG, or EMSG sensors to the tie-rod barrel for non-contact position feedback at each stop. The 20 mm diameter piston rod and PT1/4 ports handle standard pneumatic connections, while the 28 mm adjustable air cushion in each section decelerates the load smoothly at stroke ends. The body length A(SCT) is 249 mm, providing a compact tandem assembly for its 300 mm total travel.
Airtac SCT32-63 Multi-Position Tandem Air Cylinder SCT63X50X250S Technical Specifications
| Model | Airtac SCT32-63 Multi-Position Tandem Air Cylinder SCT63X50X250S |
|---|---|
| Series | SCT multi-position tie-rod cylinder |
| Bore size | Ø63 mm |
| Stroke 1 / Stroke 2 | 50 / 250 mm |
| Total travel | 300 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) | 50 mm |
| P2 (section 2) | 250 mm |
| P3 (both extended) | 300 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 SCT63X50X250S
| SCT | Multi-position (tandem) tie-rod cylinder series. |
|---|---|
| 63 | Bore size in mm (SCT range 32–100). |
| ×50 | Stroke 1 (section 1) in mm. |
| ×250 | 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 SCT63X50X250S Is Used
Two-Stage Part Diverting
Uses the 50 mm stroke to lower a diverter gate into a conveyor stream and the 250 mm stroke to fully extend it across a second lane, sorting packages to three different chutes from one actuator.
Multi-Depth Pressing
Provides a light touch at the 50 mm stop for component placement, a partial press at 250 mm, and a full-depth 300 mm press when both sections are activated, all from a single clean cylinder assembly.
Sequential Clamping & Feeding
Advances a clamp jaw 50 mm to contact a delicate part, then uses the 250 mm stroke for a controlled, low-speed feed into a machining nest, with sensor confirmation at each discrete position via the built-in magnet.
Is the Airtac SCT32-63 Multi-Position Tandem Air Cylinder SCT63X50X250S the Right Cylinder?
Select the SCT63X50X250S when your application requires four distinct, repeatable stop positions without the complexity of servo control or the bulk of two separate cylinders with external hard stops. The 50 mm and 250 mm stroke combination is ideal for a short initial advance followed by a longer secondary feed. If higher force is needed, consider stepping up to the 80 mm bore (SCT80, 2513 N push at 0.5 MPa); for a lighter load, the 50 mm bore (SCT50, 982 N push) may reduce air consumption. To replace this cylinder, match the 63 mm bore, both strokes (50 mm and 250 mm), the PT port thread, and the integrated magnet (-S). For strokes of 250 mm, ensure the rod is adequately guided if significant side loads are present, as the extended rod length can increase the risk of bending under off-axis forces.
Multi-position checklist
- ✓ Need 4 repeatable stops?
- ✓ Section strokes 50 + 250 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 SCT63X50X250S FAQ
This tandem cylinder provides four discrete mechanical stops: 0 mm (fully retracted), 50 mm (first section extended), 250 mm (second section extended), and 300 mm (both sections extended, total travel). The positions are selected by pressurising the appropriate combination of the two piston sections.
Yes, it is designed to replace two independently mounted cylinders with strokes of 50 mm and 250 mm where a common rod line is acceptable. To be a direct functional replacement, ensure the replacement SCT matches the 63 mm bore, both strokes, PT port thread, and includes the -S magnet if your existing setup uses barrel-mounted sensors.
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