Airtac SCT32-63 Multi-Position Tandem Air Cylinder SCT63X12X20S
The AirTAC Airtac SCT32-63 Multi-Position Tandem Air Cylinder SCT63X12X20S is a genuine double-acting MULTI-POSITION (tandem) air cylinder: two piston sections of 12mm and 20mm give 4 controllable stop positions across a 32mm total travel, with a Ø63mm bore, PT1/4 ports and adjustable end cushioning.
- BoreØ63 mm
- Stroke 112 mm
- Stroke 220 mm
- Total travel32 mm
- Positions4 stops
- Port sizePT1/4
About the Airtac SCT32-63 Multi-Position Tandem Air Cylinder SCT63X12X20S
The SCT63X12X20S is a double-acting multi-position cylinder that provides four fixed rod positions: 0 mm (fully retracted), 12 mm, 20 mm, and 32 mm (total travel). Each piston section generates 1559 N of push force at 0.5 MPa, making it suitable for light-duty sorting or diverting tasks where compact, repeatable stops are essential.
This model includes a built-in magnet, allowing direct mounting of CMSG, DMSG, or EMSG sensors on the tie-rod barrel for non-contact position feedback. The 63 mm bore uses a 20 mm diameter rod and PT1/4 ports, with a 28 mm air cushion at each end to decelerate the load smoothly.
Airtac SCT32-63 Multi-Position Tandem Air Cylinder SCT63X12X20S Technical Specifications
| Model | Airtac SCT32-63 Multi-Position Tandem Air Cylinder SCT63X12X20S |
|---|---|
| Series | SCT multi-position tie-rod cylinder |
| Bore size | Ø63 mm |
| Stroke 1 / Stroke 2 | 12 / 20 mm |
| Total travel | 32 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, 28 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) | 12 mm |
| P2 (section 2) | 20 mm |
| P3 (both extended) | 32 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 (Ø63mm)
| Pressure | Push force | Pull force |
|---|---|---|
| 0.5 MPa | 1559 N | 1402 N |
| 0.7 MPa | 2182 N | — |
| Max (@1.0 MPa) | 318 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 SCT63X12X20S
| SCT | Multi-position (tandem) tie-rod cylinder series. |
|---|---|
| 63 | Bore size in mm (SCT range 32–100). |
| ×12 | 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 SCT63X12X20S Is Used
Part Diverting Gate
Uses the 12 mm and 20 mm stops to direct small components into two different chutes from a single conveyor lane, with the 32 mm position acting as a bypass.
Multi-Stop Feeding
Advances a pusher plate to three distinct depths (12, 20, 32 mm) for staging different sized blanks into a stamping die.
Two-Depth Pressing
Provides a light touch at 12 mm and a full insertion at 32 mm, with the 20 mm position used for an intermediate pre-forming step.
Is the Airtac SCT32-63 Multi-Position Tandem Air Cylinder SCT63X12X20S the Right Cylinder?
Choose the SCT63X12X20S when your process requires four distinct mechanical stop points from a single compact actuator, eliminating the complexity of two separate cylinders and external hard stops. If you need higher force per section, consider stepping up to the 80 mm bore, which provides 2513 N of push at 0.5 MPa. For a direct replacement, match the 63 mm bore, both the 12 mm and 20 mm strokes, PT port thread, and the built-in magnet (-S suffix).
Multi-position checklist
- ✓ Need 4 repeatable stops?
- ✓ Section strokes 12 + 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 SCT63X12X20S FAQ
This tandem cylinder provides four discrete rod positions: 0 mm (retracted), 12 mm (section 1 extended), 20 mm (section 2 extended), and 32 mm (both sections extended for total travel).
Yes, the -S suffix indicates a built-in magnet, so you can directly clamp AirTAC CMSG, DMSG, or EMSG reed and solid-state sensors onto the cylinder's tie-rod barrel to detect each position.
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