Airtac SCT32-63 Multi-Position Tandem Air Cylinder SCT63X75X25
The AirTAC Airtac SCT32-63 Multi-Position Tandem Air Cylinder SCT63X75X25 is a genuine double-acting MULTI-POSITION (tandem) air cylinder: two piston sections of 75mm and 25mm give 4 controllable stop positions across a 100mm total travel, with a Ø63mm bore, PT1/4 ports and adjustable end cushioning.
- BoreØ63 mm
- Stroke 175 mm
- Stroke 225 mm
- Total travel100 mm
- Positions4 stops
- Port sizePT1/4
About the Airtac SCT32-63 Multi-Position Tandem Air Cylinder SCT63X75X25
The SCT63X75X25 is a double-acting multi-position pneumatic cylinder that provides four fixed rod positions: 0 mm (fully retracted), 25 mm, 75 mm, and 100 mm total travel. Each 63 mm bore piston section generates 1559 N of push force at 0.5 MPa, offering robust thrust for mid-range automation tasks. The cylinder body has a base length of 249 mm and uses a 20 mm diameter rod with M16x1.5 threads.
This tandem cylinder integrates two piston sections on a common rod, eliminating the complexity of two separate actuators and external stops. The 28 mm adjustable air cushion at each end section decelerates the load smoothly. As a genuine AirTAC product, it is built with a tie-rod construction and standard PT1/4 ports, ready for reliable industrial use.
Airtac SCT32-63 Multi-Position Tandem Air Cylinder SCT63X75X25 Technical Specifications
| Model | Airtac SCT32-63 Multi-Position Tandem Air Cylinder SCT63X75X25 |
|---|---|
| Series | SCT multi-position tie-rod cylinder |
| Bore size | Ø63 mm |
| Stroke 1 / Stroke 2 | 75 / 25 mm |
| Total travel | 100 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) | 25 mm |
| P3 (both extended) | 100 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 SCT63X75X25
| SCT | Multi-position (tandem) tie-rod cylinder series. |
|---|---|
| 63 | Bore size in mm (SCT range 32–100). |
| ×75 | Stroke 1 (section 1) in mm. |
| ×25 | 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 SCT63X75X25 Is Used
Two-Stage Sorting Gate
Uses the 25 mm and 75 mm positions to divert parts into two separate lanes, with 0 mm and 100 mm serving as home and a third lane, controlling flow in a compact conveyor junction.
Dual-Depth Pressing
Provides a shallow 25 mm pre-press and a deeper 75 mm final press stroke. The 100 mm total extension clears the tooling, all from a single actuator body.
Multi-Stop Clamping Fixture
Positions a clamp jaw at 25 mm for thin workpieces and 75 mm for thick ones. The 0 mm and 100 mm positions handle part loading and full release, streamlining changeovers.
Is the Airtac SCT32-63 Multi-Position Tandem Air Cylinder SCT63X75X25 the Right Cylinder?
Choose the SCT63X75X25 when your process requires four distinct mechanical positions without electronic feedback. It simplifies setups that would otherwise need two individual cylinders and a mounting bracket, reducing alignment work and potential drift. For lighter loads, stepping down to a 50 mm bore provides 982 N of push per section at 0.5 MPa; for heavier demands, an 80 mm bore delivers 2513 N.
To replace an existing SCT63X75X25, match the 63 mm bore, both the 75 mm and 25 mm strokes, and the PT port thread. Since the strokes are relatively short, rod deflection is minimal, but always align the load axially to prevent side-loading on the 20 mm rod.
Multi-position checklist
- ✓ Need 4 repeatable stops?
- ✓ Section strokes 75 + 25 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 SCT63X75X25 FAQ
This model provides four discrete positions: 0 mm (fully retracted), 25 mm (stroke 2 extended), 75 mm (stroke 1 extended), and 100 mm (both strokes extended). The positions are fixed by the two stroke lengths and are not infinitely adjustable.
It combines two strokes on a single common rod, guaranteeing fixed mechanical spacing between positions without external brackets or sensors. This reduces installation time and ensures the 25 mm and 75 mm stops maintain their relationship, unlike two independent cylinders that can drift out of sync.
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