
The AirTAC Airtac SCT32-63 Multi-Position Tandem Air Cylinder SCT32X50X350S is a genuine double-acting MULTI-POSITION (tandem) air cylinder: two piston sections of 50mm and 350mm give 4 controllable stop positions across a 400mm total travel, with a Ø32mm bore, PT1/8 ports and adjustable end cushioning.
The SCT32X50X350S generates four fixed rod positions—0 mm, 50 mm, 350 mm, and the combined 400 mm total travel—by pressurizing two independent piston sections on a single 12 mm diameter rod line. Each section delivers 402 N of push force at 0.5 MPa (563 N at 0.7 MPa), making it suitable for light-duty diverting or multi-depth insertion tasks where pneumatic logic selects the stop.
This tandem cylinder includes a built-in magnet, allowing CMSG or DMSG sensors to clamp directly onto the tie-rod barrel for non-contact position feedback at each stop. The body length A is 233 mm, and the 21 mm adjustable air cushion at each end helps manage end-of-stroke impact without requiring external shock absorbers.
| Model | Airtac SCT32-63 Multi-Position Tandem Air Cylinder SCT32X50X350S |
|---|---|
| Series | SCT multi-position tie-rod cylinder |
| Bore size | Ø32 mm |
| Stroke 1 / Stroke 2 | 50 / 350 mm |
| Total travel | 400 mm |
| Stop positions | 4 positions |
| Acting type | Double acting (tandem, multi-position) |
| Port size | PT1/8 |
| Rod thread | M10×1.25 |
| 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.
| Position | Rod extension |
|---|---|
| P0 (retracted) | 0 mm |
| P1 (section 1) | 50 mm |
| P2 (section 2) | 350 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.
| Pressure | Push force | Pull force |
|---|---|---|
| 0.5 MPa | 402 N | 346 N |
| 0.7 MPa | 563 N | — |
| Max (@1.0 MPa) | 82 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.
| SCT | Multi-position (tandem) tie-rod cylinder series. |
|---|---|
| 32 | Bore size in mm (SCT range 32–100). |
| ×50 | Stroke 1 (section 1) in mm. |
| ×350 | 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.
Use the 50 mm stroke to divert parts to a primary chute and the full 400 mm travel to reach a secondary lane, all from one valve manifold.
Achieve a shallow 50 mm pre-insertion depth and a deep 350 mm final press stroke for components with stepped seating requirements.
Actuate a gate to a 50 mm partial-open position for small items and a 350 mm full-open position for large pallets, with sensor confirmation at each stop.
Choose the SCT32X50X350S when a single actuator must deliver two distinct working strokes without the complexity of dual cylinders and external hard stops. The 50 mm stroke handles a short feed or gate action, while the 350 mm stroke extends for a secondary transfer. If higher force is needed, stepping up to the SCT40 bore provides 628 N push per section at 0.5 MPa. For replacement, match the 32 mm bore, both 50 mm and 350 mm strokes, PT port thread, and the -S magnet option. Since the 350 mm section stroke is long relative to the 12 mm rod, ensure the load is guided or centered to prevent rod buckling under side loads.
Multi-position checklist
It provides four discrete mechanical stops: 0 mm (fully retracted), 50 mm (first section extended), 350 mm (second section extended), and 400 mm (both sections extended). The positions are fixed by the two stroke lengths and are not infinitely adjustable.
No, this cylinder does not have a mechanical locking or brake feature. If air pressure is exhausted or lost, the piston rod can drift or drop under load. To hold a position without live pressure, you must add an external rod lock or a pilot-operated check valve in the circuit.
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