Airtac SCT32-63 Multi-Position Tandem Air Cylinder SCT50X25X125S
The AirTAC Airtac SCT32-63 Multi-Position Tandem Air Cylinder SCT50X25X125S is a genuine double-acting MULTI-POSITION (tandem) air cylinder: two piston sections of 25mm and 125mm give 4 controllable stop positions across a 150mm total travel, with a Ø50mm bore, PT1/4 ports and adjustable end cushioning.
- BoreØ50 mm
- Stroke 125 mm
- Stroke 2125 mm
- Total travel150 mm
- Positions4 stops
- Port sizePT1/4
About the Airtac SCT32-63 Multi-Position Tandem Air Cylinder SCT50X25X125S
The SCT50X25X125S is a double-acting, multi-position tandem cylinder that delivers four fixed rod positions from two independent piston sections on a common rod line. With strokes of 25 mm and 125 mm, the reachable stops are 0 mm (fully retracted), 25 mm, 125 mm, and the combined total travel of 150 mm. Each 50 mm bore section generates 982 N of push force at 0.5 MPa, making it suitable for light sorting or diverting tasks where multiple mechanical stops are needed without complex servo controls.
This model includes a built-in magnet (suffix -S), allowing direct mounting of CMSG, DMSG, or EMSG reed and solid-state sensors along the tie-rod barrel for reliable end-of-stroke or intermediate position detection. The 20 mm diameter piston rod and PT1/4 ports provide a robust flow path, while the 21 mm adjustable air cushion at each section's end decelerates the load smoothly. The body length A(SCT) is 243 mm, keeping the assembly compact for its 150 mm total travel.
Airtac SCT32-63 Multi-Position Tandem Air Cylinder SCT50X25X125S Technical Specifications
| Model | Airtac SCT32-63 Multi-Position Tandem Air Cylinder SCT50X25X125S |
|---|---|
| Series | SCT multi-position tie-rod cylinder |
| Bore size | Ø50 mm |
| Stroke 1 / Stroke 2 | 25 / 125 mm |
| Total travel | 150 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) | 25 mm |
| P2 (section 2) | 125 mm |
| P3 (both extended) | 150 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 SCT50X25X125S
| SCT | Multi-position (tandem) tie-rod cylinder series. |
|---|---|
| 50 | Bore size in mm (SCT range 32–100). |
| ×25 | Stroke 1 (section 1) in mm. |
| ×125 | 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 SCT50X25X125S Is Used
Four-Way Part Diverting
Use the four discrete stops (0, 25, 125, 150 mm) to guide parts into four separate lanes on a conveyor, selecting the lane by pressurizing the appropriate cylinder sections.
Multi-Level Pallet Stops
Deploy a pallet stop at two different heights. The 25 mm stroke provides a low-profile stop, while the 125 mm stroke offers a taller barrier, both from a single compact actuator.
Two-Depth Pressing or Stamping
Achieve a shallow 25 mm engagement for a light mark and a deeper 125 mm stroke for a full form, with the 150 mm total travel acting as a safe retracted home position.
Is the Airtac SCT32-63 Multi-Position Tandem Air Cylinder SCT50X25X125S the Right Cylinder?
Choose the SCT50X25X125S when your application requires four distinct mechanical stop positions without the cost and complexity of a servo-electric actuator. This tandem cylinder is more compact and easier to plumb than two separate cylinders with external stop collars, as the two strokes are factory-set and aligned on a single rod. For higher thrust at the same pressure, step up to the 63 mm bore (1559 N push at 0.5 MPa); for a lighter, faster-moving load, the 40 mm bore provides 628 N. To replace this unit, match the 50 mm bore, both the 25 mm and 125 mm strokes, PT port thread, basic mounting, and the -S magnet option. With a combined stroke of 150 mm, rod bending is not a primary concern under axial loads, but always guide the load if significant side forces are present.
Multi-position checklist
- ✓ Need 4 repeatable stops?
- ✓ Section strokes 25 + 125 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 SCT50X25X125S FAQ
This tandem cylinder provides four discrete mechanical stops: 0 mm (fully retracted), 25 mm (section 1 extended), 125 mm (section 2 extended), and 150 mm (both sections extended for total travel).
Yes. The -S suffix denotes a built-in magnet along the barrel, which is required for mounting CMSG, DMSG, or EMSG sensors. Without the magnet, magnetic field sensors cannot detect the piston position.
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