Airtac SCT32-63 Multi-Position Tandem Air Cylinder SCT63X75X45
The AirTAC Airtac SCT32-63 Multi-Position Tandem Air Cylinder SCT63X75X45 is a genuine double-acting MULTI-POSITION (tandem) air cylinder: two piston sections of 75mm and 45mm give 4 controllable stop positions across a 120mm total travel, with a Ø63mm bore, PT1/4 ports and adjustable end cushioning.
- BoreØ63 mm
- Stroke 175 mm
- Stroke 245 mm
- Total travel120 mm
- Positions4 stops
- Port sizePT1/4
About the Airtac SCT32-63 Multi-Position Tandem Air Cylinder SCT63X75X45
The AirTAC SCT63X75X45 tandem cylinder delivers four fixed rod positions—0 mm, 45 mm, 75 mm, and the full 120 mm combined stroke—by pressurising its two piston sections independently. Each 63 mm bore section generates 1559 N of push force at 0.5 MPa, rising to 2805 N at the maximum 0.9 MPa operating pressure, making it a robust choice for multi-stop material handling.
Built on a tie-rod platform with a 20 mm diameter rod and M16x1.5 rod thread, this double-acting unit uses PT1/4 ports and features a 28 mm adjustable air cushion on each end. The body length A(SCT) is 249 mm plus the 120 mm total stroke, giving a compact envelope for a four-position actuator that eliminates the need for two separate cylinders and external hard stops.
Airtac SCT32-63 Multi-Position Tandem Air Cylinder SCT63X75X45 Technical Specifications
| Model | Airtac SCT32-63 Multi-Position Tandem Air Cylinder SCT63X75X45 |
|---|---|
| Series | SCT multi-position tie-rod cylinder |
| Bore size | Ø63 mm |
| Stroke 1 / Stroke 2 | 75 / 45 mm |
| Total travel | 120 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) | 45 mm |
| P3 (both extended) | 120 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 SCT63X75X45
| SCT | Multi-position (tandem) tie-rod cylinder series. |
|---|---|
| 63 | Bore size in mm (SCT range 32–100). |
| ×75 | Stroke 1 (section 1) in mm. |
| ×45 | 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 SCT63X75X45 Is Used
Two-Stage Part Diverting
Use the 45 mm and 75 mm intermediate stops to route parts to two separate conveyor lanes, with full retraction and the 120 mm extended position serving as home and a third lane.
Multi-Depth Press-Fit Assembly
Achieve two distinct press depths (45 mm and 75 mm) in one cycle for assembling components with stepped features, using the 120 mm total stroke for part ejection.
Sequential Gate Control
Operate a two-gate chute system where the 45 mm position opens a small gate for fines, the 75 mm position opens a main gate, and full retraction closes both.
Is the Airtac SCT32-63 Multi-Position Tandem Air Cylinder SCT63X75X45 the Right Cylinder?
Select the SCT63X75X45 when your process requires four distinct mechanical stops without the complexity of servo control or multiple single-stroke cylinders. If the 1559 N push force per section at 0.5 MPa is insufficient, stepping up to the 80 mm bore delivers 2513 N per section; for a lighter, more compact solution, the 50 mm bore provides 982 N. The discrete 45 mm and 75 mm intermediate positions are fixed by the cylinder's construction, offering high repeatability for sorting or diverting tasks.
For replacement, match the 63 mm bore, both the 75 mm and 45 mm section strokes, PT port thread, and basic mounting configuration. If your application involves a combined stroke of 120 mm or more with a side load, consider an external guide rod assembly to protect the 20 mm rod from bending moments.
Multi-position checklist
- ✓ Need 4 repeatable stops?
- ✓ Section strokes 75 + 45 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 SCT63X75X45 FAQ
It provides four distinct, repeatable rod positions: 0 mm (fully retracted), 45 mm (stroke 2 only), 75 mm (stroke 1 only), and 120 mm (both strokes extended). The positions are fixed by the cylinder's two internal piston sections and are not infinitely adjustable.
Yes, in many cases it can. A single SCT63X75X45 replaces the need for two individual cylinders with external stops to create intermediate positions, saving space and simplifying pneumatic circuitry. Ensure the replacement matches the 63 mm bore, 75 mm and 45 mm strokes, PT1/4 ports, and basic mounting.
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