
The AirTAC Airtac SCT32-63 Multi-Position Tandem Air Cylinder SCT50X25X200 is a genuine double-acting MULTI-POSITION (tandem) air cylinder: two piston sections of 25mm and 200mm give 4 controllable stop positions across a 225mm total travel, with a Ø50mm bore, PT1/4 ports and adjustable end cushioning.
The AirTAC SCT50X25X200 tandem cylinder provides four fixed rod positions—0 mm, 25 mm, 200 mm, and 225 mm total travel—by independently pressurising its two piston sections. 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, making it suitable for multi-stop material handling tasks that require distinct, repeatable stopping points.
This double-acting unit uses a 20 mm diameter rod with M16x1.5 threads and PT1/4 ports. The body length A is 243 mm, and each end features a 21 mm adjustable air cushion to decelerate the piston smoothly. The standard TPU seals suit ambient temperatures from -20 to +70 °C.
| Model | Airtac SCT32-63 Multi-Position Tandem Air Cylinder SCT50X25X200 |
|---|---|
| Series | SCT multi-position tie-rod cylinder |
| Bore size | Ø50 mm |
| Stroke 1 / Stroke 2 | 25 / 200 mm |
| Total travel | 225 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.
| Position | Rod extension |
|---|---|
| P0 (retracted) | 0 mm |
| P1 (section 1) | 25 mm |
| P2 (section 2) | 200 mm |
| P3 (both extended) | 225 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 | 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.
| SCT | Multi-position (tandem) tie-rod cylinder series. |
|---|---|
| 50 | Bore size in mm (SCT range 32–100). |
| ×25 | Stroke 1 (section 1) in mm. |
| ×200 | 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.
Actuates a press tool to a light contact position at 25 mm for alignment, then drives fully to 225 mm for the forming stroke, ensuring consistent part registration.
Positions a diverter gate at a neutral 0 mm, a partial-open 25 mm for sampling, or a full-open 225 mm position to route product flow on a packaging line.
Stops a transfer shuttle at a home position, a 25 mm pre-stage location for inspection, and a 225 mm advanced position to hand off a part to the next station.
Choose the SCT when an application needs a short initial advance and a longer secondary stroke without the complexity of two separate cylinders and external stops. For higher force at the same pressure, the 63 mm bore version provides 1559 N of push per section at 0.5 MPa. A direct replacement must match the 50 mm bore, both the 25 mm and 200 mm section strokes, PT port threads, and the basic mounting configuration. For strokes over 300 mm total, assess the rod for side-loading and consider an external guide to prevent bending.
Multi-position checklist
This model provides four discrete mechanical stops: fully retracted at 0 mm, the first section extended at 25 mm, the second section extended at 200 mm, and both sections extended for a total travel of 225 mm.
The SCT50X25X200 uses a single common rod and body, which simplifies mounting and guarantees the relative position between the two strokes. It eliminates the alignment and sequencing logic required to coordinate two independent actuators for a fixed multi-stop sequence.
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