Airtac SCT32-63 Multi-Position Tandem Air Cylinder SCT32X25X20S
The AirTAC Airtac SCT32-63 Multi-Position Tandem Air Cylinder SCT32X25X20S is a genuine double-acting MULTI-POSITION (tandem) air cylinder: two piston sections of 25mm and 20mm give 4 controllable stop positions across a 45mm total travel, with a Ø32mm bore, PT1/8 ports and adjustable end cushioning.
- BoreØ32 mm
- Stroke 125 mm
- Stroke 220 mm
- Total travel45 mm
- Positions4 stops
- Port sizePT1/8
About the Airtac SCT32-63 Multi-Position Tandem Air Cylinder SCT32X25X20S
The SCT32X25X20S is a compact tandem multi-position cylinder that delivers four fixed rod positions from a single body: fully retracted (0 mm), 25 mm, 20 mm, and the combined total travel of 45 mm. This discrete stop logic is achieved by pressurising one piston section, the other, or both, making it ideal for simple two-depth sorting or diverting tasks without complex servo controls.
Each 32 mm bore section generates 402 N of push force at 0.5 MPa (563 N at 0.7 MPa), driven through a 12 mm diameter rod. The built-in magnet (suffix -S) allows direct mounting of CMSG/DMSG/EMSG sensors on the tie-rod barrel for end-of-stroke or mid-position confirmation. The body length A is 233 mm with a 21 mm air cushion, and the PT1/8 ports keep the pneumatic footprint small.
Airtac SCT32-63 Multi-Position Tandem Air Cylinder SCT32X25X20S Technical Specifications
| Model | Airtac SCT32-63 Multi-Position Tandem Air Cylinder SCT32X25X20S |
|---|---|
| Series | SCT multi-position tie-rod cylinder |
| Bore size | Ø32 mm |
| Stroke 1 / Stroke 2 | 25 / 20 mm |
| Total travel | 45 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.
Stop Positions (4)
| Position | Rod extension |
|---|---|
| P0 (retracted) | 0 mm |
| P1 (section 1) | 25 mm |
| P2 (section 2) | 20 mm |
| P3 (both extended) | 45 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 (Ø32mm)
| 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.
Model Code: Airtac SCT32-63 Multi-Position Tandem Air Cylinder SCT32X25X20S
| SCT | Multi-position (tandem) tie-rod cylinder series. |
|---|---|
| 32 | Bore size in mm (SCT range 32–100). |
| ×25 | Stroke 1 (section 1) in mm. |
| ×20 | 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 SCT32X25X20S Is Used
Two-Way Part Diverting
Use the four discrete positions to guide small components into separate chutes at 25 mm and 45 mm extension, with a mid-stop at 20 mm for sensor verification.
Multi-Step Ejection
Eject a part in two stages: a 20 mm push to break a static seal, then a combined 45 mm stroke to clear the nest, all from one compact cylinder.
Dual-Depth Pressing
Apply a light 20 mm press for alignment, then a full 45 mm press for insertion, with the 25 mm intermediate stop available for a secondary operation.
Is the Airtac SCT32-63 Multi-Position Tandem Air Cylinder SCT32X25X20S the Right Cylinder?
Choose the SCT32X25X20S when your application needs four distinct mechanical stops in a space smaller than two separate cylinders and brackets would occupy. The 25 mm and 20 mm strokes give you asymmetric positioning—useful for a two-step eject-and-hold sequence. If you need higher force per section, step up to the 40 mm bore, which provides 628 N push at 0.5 MPa. For replacement, match the 32 mm bore, both the 25 mm and 20 mm strokes, PT port thread, and the -S magnet option; basic mounting means no additional brackets are included, so reuse your existing SCT-compatible feet or flanges if needed.
Multi-position checklist
- ✓ Need 4 repeatable stops?
- ✓ Section strokes 25 + 20 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 SCT32X25X20S FAQ
It provides four distinct mechanical stops: 0 mm (fully retracted), 25 mm, 20 mm, and 45 mm (total travel). The positions are fixed by the two section strokes and selected by pressurising the front, rear, or both piston sections.
Yes, in many cases. The SCT32X25X20S integrates two piston sections on a single rod line, saving mounting space and eliminating the need to synchronise two separate cylinders. Ensure the replacement matches the 32 mm bore, 25 mm and 20 mm strokes, PT ports, and the -S magnet if you use sensors.
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