Airtac SCT32-63 Multi-Position Tandem Air Cylinder SCT63X150X125S
The AirTAC Airtac SCT32-63 Multi-Position Tandem Air Cylinder SCT63X150X125S is a genuine double-acting MULTI-POSITION (tandem) air cylinder: two piston sections of 150mm and 125mm give 4 controllable stop positions across a 275mm total travel, with a Ø63mm bore, PT1/4 ports and adjustable end cushioning.
- BoreØ63 mm
- Stroke 1150 mm
- Stroke 2125 mm
- Total travel275 mm
- Positions4 stops
- Port sizePT1/4
About the Airtac SCT32-63 Multi-Position Tandem Air Cylinder SCT63X150X125S
The SCT63X150X125S is a double-acting, multi-position tandem cylinder that provides four distinct rod stops: 0 mm (fully retracted), 125 mm, 150 mm, and the full combined travel of 275 mm. By pressurizing the two piston sections independently or together, you can index between these fixed mechanical positions without external hard stops. Each 63 mm bore section delivers 1559 N of push force at 0.5 MPa, rising to 2805 N at the maximum operating pressure of 0.9 MPa.
This model includes a built-in magnet (-S suffix), allowing standard CMSG, DMSG, or EMSG sensors to clamp directly onto the tie-rod barrel for non-contact position sensing at each stop. The 20 mm diameter piston rod is threaded M16x1.5, and the PT1/4 ports feed adjustable air cushions with a 28 mm cushion length to decelerate the load smoothly. The rigid tie-rod construction ensures a consistent body length A of 249 mm.
Airtac SCT32-63 Multi-Position Tandem Air Cylinder SCT63X150X125S Technical Specifications
| Model | Airtac SCT32-63 Multi-Position Tandem Air Cylinder SCT63X150X125S |
|---|---|
| Series | SCT multi-position tie-rod cylinder |
| Bore size | Ø63 mm |
| Stroke 1 / Stroke 2 | 150 / 125 mm |
| Total travel | 275 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) | 150 mm |
| P2 (section 2) | 125 mm |
| P3 (both extended) | 275 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 SCT63X150X125S
| SCT | Multi-position (tandem) tie-rod cylinder series. |
|---|---|
| 63 | Bore size in mm (SCT range 32–100). |
| ×150 | 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 SCT63X150X125S Is Used
Four-Position Diverter Gate
Use the four discrete stops to route packages to four separate conveyor lanes. The 275 mm total travel and 1559 N push force reliably shift a diverter chute between all positions with simple pneumatic controls.
Multi-Depth Pressing Station
Control a pressing tool to two different depths (125 mm and 150 mm) plus a full-extension position (275 mm) for part ejection. The fixed mechanical stops ensure consistent, repeatable depth control without a PLC.
Staged Part Transfer
Transfer parts between four stations on an assembly line. The cylinder's 20 mm rod and tie-rod design handle the repetitive cycling, while the built-in magnet provides sensor confirmation at each of the four positions.
Is the Airtac SCT32-63 Multi-Position Tandem Air Cylinder SCT63X150X125S the Right Cylinder?
Choose the SCT63X150X125S when your application needs four fixed positions without the complexity of servo controls or the alignment issues of two separate cylinders. This tandem unit is more compact and reliable than plumbing two individual 63 mm bore cylinders in series. If your force requirement is lower, stepping down to a 50 mm bore (982 N push at 0.5 MPa) can reduce air consumption. For a direct replacement, match the 63 mm bore, both strokes (150 mm and 125 mm), the PT port thread, the built-in magnet, and the basic mounting style.
With a 150 mm stroke on the first section, consider external guides if the rod is subjected to high side loads, as the extended length can increase the bending moment on the rod bearings.
Multi-position checklist
- ✓ Need 4 repeatable stops?
- ✓ Section strokes 150 + 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 SCT63X150X125S FAQ
This cylinder has four distinct mechanical stops: 0 mm (fully retracted), 125 mm (section 2 extended), 150 mm (section 1 extended), and 275 mm (both sections extended for total travel). The positions are fixed and selected by pressurizing the two air ports in different combinations.
Yes, if your goal is to achieve three or four fixed positions. The SCT63X150X125S is a direct, compact replacement for two cylinders mounted back-to-back, eliminating alignment issues and reducing plumbing. Ensure your replacement matches the 63 mm bore, 150/125 mm strokes, PT1/4 ports, and the -S magnet option for sensor compatibility.
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