Airtac SCT32-63 Multi-Position Tandem Air Cylinder SCT50X75X50
The AirTAC Airtac SCT32-63 Multi-Position Tandem Air Cylinder SCT50X75X50 is a genuine double-acting MULTI-POSITION (tandem) air cylinder: two piston sections of 75mm and 50mm give 4 controllable stop positions across a 125mm total travel, with a Ø50mm bore, PT1/4 ports and adjustable end cushioning.
- BoreØ50 mm
- Stroke 175 mm
- Stroke 250 mm
- Total travel125 mm
- Positions4 stops
- Port sizePT1/4
About the Airtac SCT32-63 Multi-Position Tandem Air Cylinder SCT50X75X50
The SCT50X75X50 is a tandem double-acting pneumatic cylinder that provides four fixed rod positions without external hard stops. By pressurising one or both of its 50 mm bore sections, the rod locates at 0 mm (fully retracted), 50 mm, 75 mm, or the full combined travel of 125 mm. Each actuated section generates 982 N of push force at 0.5 MPa, rising to 1767 N at the 0.9 MPa maximum operating pressure.
This tie-rod cylinder uses a 20 mm diameter piston rod and M16x1.5 rod-end threads. The PT1/4 ports are standard, and the adjustable air cushion on each section is 21 mm long, helping to decelerate the load smoothly at each end-of-stroke position. The body length A is 243 mm, making it a compact solution for multi-stop linear tasks where a single-stroke cylinder would need additional mechanical stops.
Airtac SCT32-63 Multi-Position Tandem Air Cylinder SCT50X75X50 Technical Specifications
| Model | Airtac SCT32-63 Multi-Position Tandem Air Cylinder SCT50X75X50 |
|---|---|
| Series | SCT multi-position tie-rod cylinder |
| Bore size | Ø50 mm |
| Stroke 1 / Stroke 2 | 75 / 50 mm |
| Total travel | 125 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, 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) | 75 mm |
| P2 (section 2) | 50 mm |
| P3 (both extended) | 125 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 (Ø50mm)
| Pressure | Push force | Pull force |
|---|---|---|
| 0.5 MPa | 982 N | 825 N |
| 0.7 MPa | 1374 N | — |
| Max (@1.0 MPa) | 200 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 SCT50X75X50
| SCT | Multi-position (tandem) tie-rod cylinder series. |
|---|---|
| 50 | Bore size in mm (SCT range 32–100). |
| ×75 | Stroke 1 (section 1) in mm. |
| ×50 | 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 SCT50X75X50 Is Used
Two-Stage Diverter Gate
Operates a conveyor diverter with four positions: home (0 mm), a 50 mm partial divert, a 75 mm secondary path, and full 125 mm extension for a third lane, all from one compact actuator.
Multi-Depth Pressing
Drives a pressing tool to two distinct depths in sequence. The 75 mm stroke sets the first depth, the 50 mm stroke adds a second, shallower depth, and both together provide the full 125 mm travel for part ejection.
Sequential Part Staging
Positions a workpiece pallet at four stations along a short transfer line. The cylinder's discrete 50 mm, 75 mm, and 125 mm stops align the pallet precisely with drilling, tapping, and inspection heads.
Is the Airtac SCT32-63 Multi-Position Tandem Air Cylinder SCT50X75X50 the Right Cylinder?
Choose the SCT50X75X50 when your process requires four distinct linear positions without the complexity of two separate cylinders and a coupling bracket. It is a simpler, more rigid alternative to an SC50 with external adjustable stops, giving you repeatable discrete positions controlled purely by your directional valve logic. If your load requires slightly less force, the 40 mm bore SCT40X75X50 offers 628 N push per section at 0.5 MPa; for higher force demands, the 63 mm bore SCT63X75X50 provides 1559 N per section.
For a direct replacement, match the 50 mm bore, both strokes (75 mm and 50 mm), PT port thread, and basic mounting configuration. If your application involves a long unsupported load, consider adding an external guide rod assembly to protect the 20 mm rod from side-loading and bending, especially when the rod is fully extended to the 125 mm position.
Multi-position checklist
- ✓ Need 4 repeatable stops?
- ✓ Section strokes 75 + 50 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 SCT50X75X50 FAQ
This cylinder has four discrete rod positions: 0 mm (fully retracted), 50 mm (section 2 extended), 75 mm (section 1 extended), and 125 mm (both sections extended, total travel). The positions are fixed by the two stroke lengths and are selected by pressurising the appropriate cylinder sections.
The SCT50X75X50 integrates two piston sections on a single common rod, providing four fixed positions in a self-contained, pre-aligned unit. This eliminates the need for a coupling bracket, saves space, and simplifies the mounting and plumbing compared to two individual SC50 cylinders. The force output per section is identical to a standard SC50 (982 N push at 0.5 MPa).
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