Airtac SCT32-63 Multi-Position Tandem Air Cylinder SCT50X40X25S
The AirTAC Airtac SCT32-63 Multi-Position Tandem Air Cylinder SCT50X40X25S is a genuine double-acting MULTI-POSITION (tandem) air cylinder: two piston sections of 40mm and 25mm give 4 controllable stop positions across a 65mm total travel, with a Ø50mm bore, PT1/4 ports and adjustable end cushioning.
- BoreØ50 mm
- Stroke 140 mm
- Stroke 225 mm
- Total travel65 mm
- Positions4 stops
- Port sizePT1/4
About the Airtac SCT32-63 Multi-Position Tandem Air Cylinder SCT50X40X25S
The SCT50X40X25S is a tandem multi-position pneumatic cylinder that delivers four fixed rod positions from two independent strokes: 0 mm (fully retracted), 40 mm, 25 mm, and the combined total travel of 65 mm. Each 50 mm bore piston section generates 982 N of push force at 0.5 MPa, making it suitable for sorting or diverting tasks that require distinct, repeatable stop points without complex servo controls.
This model includes a built-in magnet (-S suffix), allowing direct mounting of CMSG, DMSG, or EMSG reed and solid-state sensors along the tie-rod barrel for reliable end-of-stroke or mid-stroke position feedback. The 20 mm diameter piston rod and 21 mm adjustable air cushion at each end help manage kinetic energy, while the body length A(SCT) is 243 mm.
Airtac SCT32-63 Multi-Position Tandem Air Cylinder SCT50X40X25S Technical Specifications
| Model | Airtac SCT32-63 Multi-Position Tandem Air Cylinder SCT50X40X25S |
|---|---|
| Series | SCT multi-position tie-rod cylinder |
| Bore size | Ø50 mm |
| Stroke 1 / Stroke 2 | 40 / 25 mm |
| Total travel | 65 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) | 40 mm |
| P2 (section 2) | 25 mm |
| P3 (both extended) | 65 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 SCT50X40X25S
| SCT | Multi-position (tandem) tie-rod cylinder series. |
|---|---|
| 50 | Bore size in mm (SCT range 32–100). |
| ×40 | Stroke 1 (section 1) in mm. |
| ×25 | 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 SCT50X40X25S Is Used
Two-Way Part Diverting
Use the four distinct stop positions (0, 25, 40, 65 mm) to guide parts into two separate chutes or conveyor lanes from a single infeed point, with sensors confirming each position.
Multi-Level Stop Gate
Actuate a gate to three different heights for metering or releasing rows of products in a packaging line, using the 25 mm and 40 mm strokes for partial openings and 65 mm for full open.
Staged Clamping or Pressing
Apply a light clamp at the 25 mm stroke, a higher force pre-press at 40 mm, and a full press at the combined 65 mm travel, with the built-in magnet confirming each stage.
Is the Airtac SCT32-63 Multi-Position Tandem Air Cylinder SCT50X40X25S the Right Cylinder?
Choose the SCT when your application needs two or more fixed linear positions from a single compact assembly, eliminating the alignment and plumbing complexity of two separate cylinders with external stops. For this 50 mm bore, the per-section push force is 982 N at 0.5 MPa. If you need higher force, stepping up to a 63 mm bore provides 1559 N per section; for a lighter load, the 40 mm bore offers 628 N.
A direct replacement must match the 50 mm bore, both 40 mm and 25 mm strokes, PT port thread, basic mounting, and the integrated magnet for sensor compatibility. Since the longest section stroke is under 300 mm, standard guiding is usually sufficient, but always check for side loads if the rod is connected to a rigidly guided tool.
Multi-position checklist
- ✓ Need 4 repeatable stops?
- ✓ Section strokes 40 + 25 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 SCT50X40X25S FAQ
This tandem cylinder provides four discrete rod positions: 0 mm (fully retracted), 40 mm (first section extended), 25 mm (second section extended), and 65 mm (both sections extended for total travel). You select the position by pressurizing the appropriate combination of the two cylinder sections.
Yes, the -S suffix indicates a built-in magnet is installed along the barrel. This allows you to directly mount CMSG, DMSG, or EMSG series reed and solid-state sensors to detect the piston position at any of the four stops without needing external brackets.
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