Airtac SCT32-63 Multi-Position Tandem Air Cylinder SCT63X75X125S
The AirTAC Airtac SCT32-63 Multi-Position Tandem Air Cylinder SCT63X75X125S is a genuine double-acting MULTI-POSITION (tandem) air cylinder: two piston sections of 75mm and 125mm give 4 controllable stop positions across a 200mm total travel, with a Ø63mm bore, PT1/4 ports and adjustable end cushioning.
- BoreØ63 mm
- Stroke 175 mm
- Stroke 2125 mm
- Total travel200 mm
- Positions4 stops
- Port sizePT1/4
About the Airtac SCT32-63 Multi-Position Tandem Air Cylinder SCT63X75X125S
The SCT63X75X125S is a double-acting multi-position tandem cylinder that delivers four fixed rod positions: fully retracted (0 mm), 75 mm, 125 mm, and the total extended travel of 200 mm. Each 63 mm bore piston section generates 1559 N of push force at 0.5 MPa, rising to 2805 N at the maximum operating pressure of 0.9 MPa, making it a robust choice for sequenced material handling tasks.
This model includes a built-in magnet (-S suffix), allowing CMSG, DMSG, or EMSG solid-state or reed sensors to clamp directly onto the tie-rod barrel for end-of-stroke or intermediate position confirmation. It features a 20 mm diameter piston rod, PT1/4 ports, and an adjustable air cushion length of 28 mm to manage end-of-travel deceleration. The body length A(SCT) is 249 mm.
Airtac SCT32-63 Multi-Position Tandem Air Cylinder SCT63X75X125S Technical Specifications
| Model | Airtac SCT32-63 Multi-Position Tandem Air Cylinder SCT63X75X125S |
|---|---|
| Series | SCT multi-position tie-rod cylinder |
| Bore size | Ø63 mm |
| Stroke 1 / Stroke 2 | 75 / 125 mm |
| Total travel | 200 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) | 75 mm |
| P2 (section 2) | 125 mm |
| P3 (both extended) | 200 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 SCT63X75X125S
| SCT | Multi-position (tandem) tie-rod cylinder series. |
|---|---|
| 63 | Bore size in mm (SCT range 32–100). |
| ×75 | 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 SCT63X75X125S Is Used
3-Way Diverter Gate
Use the four discrete stops to guide packages to three separate conveyor lanes. The rod can park at 0 mm (home), extend to 75 mm for lane one, 125 mm for lane two, or fully extend to 200 mm for lane three.
Multi-Depth Pressing
Control a press platen to two distinct working depths in one cycle. The 75 mm and 125 mm stops allow a shallow pre-form and a deeper final form, with the 1559 N per-section force handling consistent pressing loads.
Sequenced Clamping Fixture
Operate a two-stage clamp for parts of varying heights. The cylinder first advances to 75 mm for a low-profile workpiece, then can move to 125 mm or the full 200 mm for taller assemblies, with sensor feedback at every position via the built-in magnet.
Is the Airtac SCT32-63 Multi-Position Tandem Air Cylinder SCT63X75X125S the Right Cylinder?
An SCT tandem cylinder is the right choice when a machine axis needs to stop reliably at more than two positions without the complexity and tuning of a servo drive. This 63 mm bore unit suits mid-range thrust requirements; if you need a lighter actuator, the 50 mm bore SCT provides 982 N of push per section, while stepping up to an 80 mm bore delivers 2513 N. The four discrete stops (0, 75, 125, 200 mm) are fixed by the two piston strokes, offering repeatable mechanical positioning.
For a drop-in replacement, match the 63 mm bore, both the 75 mm and 125 mm strokes, the PT port thread, and the built-in magnet (-S). This basic mount version has no attached brackets, giving you the flexibility to use any SCT-compatible foot (LB), flange (FA/FB), or clevis (CA/CB) mounting accessory. As the total travel is 200 mm, the rod is well-supported within the standard stroke range, and no additional external guiding is typically required for purely axial loads.
Multi-position checklist
- ✓ Need 4 repeatable stops?
- ✓ Section strokes 75 + 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 SCT63X75X125S FAQ
This tandem cylinder provides four discrete mechanical stop positions: 0 mm (fully retracted), 75 mm (first section extended), 125 mm (second section extended), and 200 mm (both sections extended). The positions are fixed by the two different stroke lengths and are selected by pressurizing the cylinder's sections individually or together.
Yes, it is designed to do exactly that in many applications. A single SCT63X75X125S with a built-in magnet can replace a setup with two standard 63 mm bore cylinders and external hard stops to achieve the same 75 mm and 125 mm intermediate positions, simplifying the machine layout, reducing the number of valves, and cutting plumbing costs.
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