Airtac SCT32-63 Multi-Position Tandem Air Cylinder SCT63X50X125S
The AirTAC Airtac SCT32-63 Multi-Position Tandem Air Cylinder SCT63X50X125S is a genuine double-acting MULTI-POSITION (tandem) air cylinder: two piston sections of 50mm and 125mm give 4 controllable stop positions across a 175mm total travel, with a Ø63mm bore, PT1/4 ports and adjustable end cushioning.
- BoreØ63 mm
- Stroke 150 mm
- Stroke 2125 mm
- Total travel175 mm
- Positions4 stops
- Port sizePT1/4
About the Airtac SCT32-63 Multi-Position Tandem Air Cylinder SCT63X50X125S
The SCT63X50X125S is a double-acting multi-position tandem cylinder that delivers four fixed rod positions from two independent piston sections on a common 20 mm rod. By pressurising the sections individually or together, the rod locates at 0 mm (retracted), 50 mm, 125 mm, or the full combined travel of 175 mm. Each section generates a push force of 1559 N at 0.5 MPa, rising to 2805 N at the maximum operating pressure of 0.9 MPa, making it suitable for sorting gates and multi-depth pressing fixtures.
The cylinder body has an A(SCT) length of 249 mm and uses an adjustable pneumatic cushion of 28 mm per end to decelerate the load smoothly. A built-in magnet band on the piston allows CMSG, DMSG, or EMSG solid-state sensors to clamp directly onto the tie-rod barrel for non-contact position feedback at each stop. PT1/4 ports and an M16x1.5 rod thread are standard on this 63 mm bore model.
Airtac SCT32-63 Multi-Position Tandem Air Cylinder SCT63X50X125S Technical Specifications
| Model | Airtac SCT32-63 Multi-Position Tandem Air Cylinder SCT63X50X125S |
|---|---|
| Series | SCT multi-position tie-rod cylinder |
| Bore size | Ø63 mm |
| Stroke 1 / Stroke 2 | 50 / 125 mm |
| Total travel | 175 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) | 50 mm |
| P2 (section 2) | 125 mm |
| P3 (both extended) | 175 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 SCT63X50X125S
| SCT | Multi-position (tandem) tie-rod cylinder series. |
|---|---|
| 63 | Bore size in mm (SCT range 32–100). |
| ×50 | 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 SCT63X50X125S Is Used
3-Way Diverter Gate
Use the four distinct stops to guide product into three separate lanes on a conveyor. Retract for lane one, extend to 50 mm for lane two, 125 mm for lane three, and full 175 mm stroke for a bypass position.
Multi-Depth Pressing
Control a forming tool to two different insertion depths in one cycle. The 50 mm and 125 mm stops set shallow and deep press positions, while the 175 mm total stroke provides a clear tool-change height.
Staged Part Ejection
Eject finished parts from a die in a controlled sequence. The first 50 mm movement breaks the part free, the 125 mm position presents it for pick-and-place, and full retraction clears the tooling area.
Is the Airtac SCT32-63 Multi-Position Tandem Air Cylinder SCT63X50X125S the Right Cylinder?
Choose the SCT when your process needs up to four positive mechanical stops without the complexity of servo control or the alignment challenges of two separate cylinders. This 63 mm bore unit provides 1559 N of push per section at standard plant pressure, which suits medium transfer and clamping tasks. If your load is lighter, stepping down to a 40 mm bore reduces the per-section force to 628 N and trims the body width; for heavier tooling, the 80 mm bore delivers 2513 N per section.
A direct replacement must match the 63 mm bore, both the 50 mm and 125 mm section strokes, PT port thread, and the built-in magnet (S suffix). Since the combined travel reaches 175 mm, ensure the rod is guided externally if the load applies significant side force, as the tandem construction lengthens the unsupported rod extension.
Multi-position checklist
- ✓ Need 4 repeatable stops?
- ✓ Section strokes 50 + 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 SCT63X50X125S FAQ
This tandem cylinder provides four discrete mechanical stops: 0 mm (fully retracted), 50 mm (first section extended), 125 mm (second section extended), and 175 mm (both sections extended for total travel). The stops are fixed by the two stroke lengths and are not infinitely adjustable.
The SCT integrates two piston sections on a single rod line, guaranteeing coaxial alignment and reducing mounting footprint. It eliminates the need to synchronise two separate cylinders and their plumbing, providing three or four repeatable positions from one compact assembly. The built-in magnet (S suffix) also allows a single set of sensors to detect all positions.
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