Airtac SCT32-63 Multi-Position Tandem Air Cylinder SCT50X120X280S
The AirTAC Airtac SCT32-63 Multi-Position Tandem Air Cylinder SCT50X120X280S is a genuine double-acting MULTI-POSITION (tandem) air cylinder: two piston sections of 120mm and 280mm give 4 controllable stop positions across a 400mm total travel, with a Ø50mm bore, PT1/4 ports and adjustable end cushioning.
- BoreØ50 mm
- Stroke 1120 mm
- Stroke 2280 mm
- Total travel400 mm
- Positions4 stops
- Port sizePT1/4
About the Airtac SCT32-63 Multi-Position Tandem Air Cylinder SCT50X120X280S
The SCT50X120X280S is a double-acting tandem cylinder that delivers four fixed rod positions from a single body: 0 mm (fully retracted), 120 mm, 280 mm, and the total travel of 400 mm. Each 50 mm bore section generates 982 N of push force at 0.5 MPa, rising to 1767 N at the maximum operating pressure of 0.9 MPa, driven through a rigid 20 mm diameter piston rod.
This model includes a factory-installed magnet, allowing direct mounting of CMSG, DMSG, or EMSG sensors along the tie-rod barrel for non-contact position feedback at every stop. The cylinder uses a PT1/4 port, adjustable air cushioning with a 21 mm cushion length, and a body length A of 243 mm, making it a compact solution for multi-step actuation where electronic verification of position is required.
Airtac SCT32-63 Multi-Position Tandem Air Cylinder SCT50X120X280S Technical Specifications
| Model | Airtac SCT32-63 Multi-Position Tandem Air Cylinder SCT50X120X280S |
|---|---|
| Series | SCT multi-position tie-rod cylinder |
| Bore size | Ø50 mm |
| Stroke 1 / Stroke 2 | 120 / 280 mm |
| Total travel | 400 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, 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 (4)
| Position | Rod extension |
|---|---|
| P0 (retracted) | 0 mm |
| P1 (section 1) | 120 mm |
| P2 (section 2) | 280 mm |
| P3 (both extended) | 400 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 (Ø50mm)
| Pressure | Push force | Pull force |
|---|---|---|
| 0.5 MPa | 982 N | 825 N |
| 0.7 MPa | 1374 N | — |
| Max (@1.0 MPa) | 200 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 SCT50X120X280S
| SCT | Multi-position (tandem) tie-rod cylinder series. |
|---|---|
| 50 | Bore size in mm (SCT range 32–100). |
| ×120 | Stroke 1 (section 1) in mm. |
| ×280 | 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 SCT50X120X280S Is Used
Two-Stage Diverter Gate
Use the 120 mm stroke for a partial bypass position and the full 400 mm stroke to completely divert product flow, with sensor confirmation at each stop via the built-in magnet.
Multi-Level Part Rejection
Actuate a reject bin gate to three distinct heights (120, 280, 400 mm) to sort defective parts by type, using the cylinder's discrete stops for repeatable, air-piloted positioning.
Staged Clamping or Pressing
Apply a low-force pre-clamp at 120 mm, a secondary forming position at 280 mm, and a final high-force press at 400 mm, leveraging the 1767 N thrust available at 0.9 MPa.
Is the Airtac SCT32-63 Multi-Position Tandem Air Cylinder SCT50X120X280S the Right Cylinder?
Choose this 4-position SCT model when a process requires three distinct extended stops without the complexity of two separate cylinders and external hard stops. The 120 mm and 280 mm strokes provide an asymmetric position set ideal for applications like two-stage part rejection or a diverter gate with a partial-open bypass. If your load demands higher force, stepping up to the 63 mm bore SCT provides 1559 N of push per section at the same 0.5 MPa pressure.
For direct replacement, match the 50 mm bore, the exact stroke combination of 120 mm and 280 mm, the PT port thread, and the integrated magnet (-S suffix). The basic mounting configuration allows you to add the specific bracket your machine requires, such as an FA front flange for panel mounting or an LB foot mount for surface installation. With a combined stroke of 400 mm, ensure the rod is adequately guided if significant side loads are present to prevent bending.
Multi-position checklist
- ✓ Need 4 repeatable stops?
- ✓ Section strokes 120 + 280 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 SCT50X120X280S FAQ
This tandem cylinder provides four discrete mechanical stops: 0 mm (fully retracted), 120 mm, 280 mm, and the total extended length of 400 mm. The positions are achieved by pressurizing the first section, the second section, or both simultaneously.
Yes, it is a direct form-factor replacement for applications that previously used two SC50 cylinders with strokes of 120 mm and 280 mm mounted back-to-back. It provides the same three extended positions in a single, pre-aligned body with a common rod, reducing mounting hardware and alignment time.
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