
The AirTAC Airtac SCT32-63 Multi-Position Tandem Air Cylinder SCT32X55X100S is a genuine double-acting MULTI-POSITION (tandem) air cylinder: two piston sections of 55mm and 100mm give 4 controllable stop positions across a 155mm total travel, with a Ø32mm bore, PT1/8 ports and adjustable end cushioning.
The SCT32X55X100S is a double-acting multi-position cylinder that delivers four distinct rod positions — 0 mm, 55 mm, 100 mm, and 155 mm — by pressurising two independent piston sections on a single 12 mm rod. Each section generates 402 N of push force at 0.5 MPa, making it a compact solution for light-duty sorting or diverting tasks where two standard cylinders would consume more space.
This model includes a built-in magnet (-S suffix), allowing CMSG, DMSG, or EMSG sensors to mount directly on the tie-rod barrel for end-of-stroke or intermediate position confirmation. The body length A(SCT) is 233 mm, and the adjustable air cushion at each end is 21 mm long, helping to manage deceleration at all four stops.
| Model | Airtac SCT32-63 Multi-Position Tandem Air Cylinder SCT32X55X100S |
|---|---|
| Series | SCT multi-position tie-rod cylinder |
| Bore size | Ø32 mm |
| Stroke 1 / Stroke 2 | 55 / 100 mm |
| Total travel | 155 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) | 55 mm |
| P2 (section 2) | 100 mm |
| P3 (both extended) | 155 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). |
| ×55 | Stroke 1 (section 1) in mm. |
| ×100 | 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.
Uses the 55 mm and 100 mm strokes to guide parts down two separate chutes from a single feed lane, with the 155 mm total travel providing a third divert path.
Drives a tool to two controlled insertion depths (55 mm and 100 mm) plus a full-extension 155 mm position for part ejection, all from one compact actuator.
Applies a light clamp at the 55 mm stop and a full-force clamp at the 100 mm stop, with the 155 mm position used for clear part loading and unloading.
Choose the SCT32X55X100S when your application needs four fixed mechanical stops without the complexity of servo control. It replaces two separate 32 mm bore cylinders or an SC cylinder with external hard stops, saving installation time and reducing the number of valves. If higher force is required, step up to the 40 mm bore SCT40 series, which provides 628 N of push per section at 0.5 MPa. For replacement, match the 32 mm bore, both strokes (55 mm and 100 mm), PT port thread, and the -S magnet option.
Multi-position checklist
This model has four discrete positions because the two strokes are different (55 mm and 100 mm). The rod stops at 0 mm (fully retracted), 55 mm, 100 mm, and the total travel of 155 mm. The positions are fixed and selected by pressurising either or both cylinder sections.
No, the SCT cylinder does not lock or hold position when air pressure is lost or a valve is centered. The piston will drift if a load is applied. To hold a load at the 55 mm or 100 mm stop without live pressure, you must add an external rod brake or a pilot-operated check valve.
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