Airtac SCT32-63 Multi-Position Tandem Air Cylinder SCT32X20X25S
The AirTAC Airtac SCT32-63 Multi-Position Tandem Air Cylinder SCT32X20X25S is a genuine double-acting MULTI-POSITION (tandem) air cylinder: two piston sections of 20mm and 25mm give 4 controllable stop positions across a 45mm total travel, with a Ø32mm bore, PT1/8 ports and adjustable end cushioning.
- BoreØ32 mm
- Stroke 120 mm
- Stroke 225 mm
- Total travel45 mm
- Positions4 stops
- Port sizePT1/8
About the Airtac SCT32-63 Multi-Position Tandem Air Cylinder SCT32X20X25S
This SCT32X20X25S multi-position cylinder delivers four fixed rod positions—0 mm, 20 mm, 25 mm, and 45 mm total travel—by pressurising its two tandem piston sections independently or together. Each section generates a push force of 402 N at 0.5 MPa, making it a compact solution for light sorting or diverting tasks where two distinct intermediate stops are needed without complex controls.
The 32 mm bore unit features a 12 mm diameter rod and M10x1.25 rod thread, with PT1/8 ports. An integrated magnet allows direct mounting of CMSG/DMSG/EMSG sensors on the tie-rod barrel for end-of-stroke or mid-position confirmation. Its adjustable air cushion on each section decelerates the load smoothly across all four stops.
Airtac SCT32-63 Multi-Position Tandem Air Cylinder SCT32X20X25S Technical Specifications
| Model | Airtac SCT32-63 Multi-Position Tandem Air Cylinder SCT32X20X25S |
|---|---|
| Series | SCT multi-position tie-rod cylinder |
| Bore size | Ø32 mm |
| Stroke 1 / Stroke 2 | 20 / 25 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) | 20 mm |
| P2 (section 2) | 25 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 SCT32X20X25S
| SCT | Multi-position (tandem) tie-rod cylinder series. |
|---|---|
| 32 | Bore size in mm (SCT range 32–100). |
| ×20 | 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 SCT32X20X25S Is Used
Two-Way Diverter Gate
Use the four discrete stops to direct small packages onto two different conveyor lanes. The 20 mm and 25 mm strokes provide precise gate angles for reliable sorting.
Multi-Stop Part Feeding
Advance components to a pick point in three controlled steps. The 402 N force per section is well-suited for feeding lightweight electronic or medical device parts.
Dual-Depth Light Pressing
Achieve two different insertion depths in an assembly process. The 12 mm rod and adjustable cushion protect delicate parts during the final 45 mm total stroke.
Is the Airtac SCT32-63 Multi-Position Tandem Air Cylinder SCT32X20X25S the Right Cylinder?
Choose this 4-position SCT when your application requires two different intermediate stopping points from a single compact actuator, replacing the need for two separate cylinders and a mounting bracket. If the 402 N push force per section is marginal, stepping up to the SCT40 bore provides 628 N per section at the same pressure. For replacement, match the 32 mm bore, both the 20 mm and 25 mm section strokes, the PT port thread, and the built-in magnet (-S suffix). Since the strokes are short, rod guiding is typically unnecessary unless the load is completely unsupported.
Multi-position checklist
- ✓ Need 4 repeatable stops?
- ✓ Section strokes 20 + 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 SCT32X20X25S FAQ
This tandem cylinder provides four discrete rod positions: fully retracted (0 mm), first section extended (20 mm), second section extended (25 mm), and both sections extended for the full 45 mm travel. The stops are fixed by the two stroke lengths, not infinitely variable.
No, like all standard pneumatic cylinders, the SCT32X20X25S will not lock or hold its position if air pressure is exhausted or lost. The piston can drift. If you need to hold a load at one of the four stops without live pressure, you must add an external rod lock or a pilot-operated check valve.
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