Airtac SCT32-63 Multi-Position Tandem Air Cylinder SCT63X125X75
The AirTAC Airtac SCT32-63 Multi-Position Tandem Air Cylinder SCT63X125X75 is a genuine double-acting MULTI-POSITION (tandem) air cylinder: two piston sections of 125mm and 75mm give 4 controllable stop positions across a 200mm total travel, with a Ø63mm bore, PT1/4 ports and adjustable end cushioning.
- BoreØ63 mm
- Stroke 1125 mm
- Stroke 275 mm
- Total travel200 mm
- Positions4 stops
- Port sizePT1/4
About the Airtac SCT32-63 Multi-Position Tandem Air Cylinder SCT63X125X75
The SCT63X125X75 is a double-acting tandem cylinder that delivers four fixed rod positions without external stops. By pressurising one or both 63 mm bore sections, the rod locates at 0 mm (retracted), 75 mm, 125 mm, or the full combined travel of 200 mm. Each actuated section provides 1559 N of push force at 0.5 MPa, rising to 2805 N at 0.9 MPa, making it suitable for multi-step clamping or sorting tasks.
This tie-rod cylinder uses a 20 mm diameter rod with M16x1.5 threads and PT1/4 ports. The integral air cushion is 28 mm long per end, and the SCT body length A is 249 mm. Operating on filtered air from 0.15 to 1.0 MPa, it handles temperatures from -20 to +70 °C with its standard TPU seals.
Airtac SCT32-63 Multi-Position Tandem Air Cylinder SCT63X125X75 Technical Specifications
| Model | Airtac SCT32-63 Multi-Position Tandem Air Cylinder SCT63X125X75 |
|---|---|
| Series | SCT multi-position tie-rod cylinder |
| Bore size | Ø63 mm |
| Stroke 1 / Stroke 2 | 125 / 75 mm |
| Total travel | 200 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) | 125 mm |
| P2 (section 2) | 75 mm |
| P3 (both extended) | 200 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 SCT63X125X75
| SCT | Multi-position (tandem) tie-rod cylinder series. |
|---|---|
| 63 | Bore size in mm (SCT range 32–100). |
| ×125 | Stroke 1 (section 1) in mm. |
| ×75 | 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 SCT63X125X75 Is Used
Two-Stage Sorting Gate
Uses the 75 mm and 125 mm positions to divert packages to two separate conveyor lanes, with the 200 mm total travel acting as a third reject path, all from one compact cylinder.
Multi-Depth Pressing
Provides three distinct pressing depths for assembly operations. The 75 mm stop pre-forms a part, the 125 mm stop inserts a component, and the 200 mm full travel completes the final press.
Sequential Part Feeding
Advances a workpiece through three stations on a linear transfer line. The rod moves 75 mm to station one, retracts 50 mm to the 125 mm position for station two, then extends fully to 200 mm for station three.
Is the Airtac SCT32-63 Multi-Position Tandem Air Cylinder SCT63X125X75 the Right Cylinder?
Choose the SCT63X125X75 when a process needs four distinct, repeatable stop points without the complexity of two separate cylinders and external hard stops. If the 1559 N push force per section at 0.5 MPa is more than needed, stepping down to a 50 mm bore provides 982 N. For a direct replacement, match the 63 mm bore, both strokes of 125 mm and 75 mm, PT thread, and basic mounting. Always confirm the total 200 mm travel fits the machine envelope.
With the 125 mm section stroke, consider external guiding if the rod sees significant side loading. The rod's support is determined by the longest individual stroke, so a guide rail or rod alignment coupler prevents bending and seal wear in cantilevered applications.
Multi-position checklist
- ✓ Need 4 repeatable stops?
- ✓ Section strokes 125 + 75 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 SCT63X125X75 FAQ
This tandem cylinder provides four discrete rod positions: 0 mm (fully retracted), 75 mm (section two extended), 125 mm (section one extended), and 200 mm (both sections extended). The stops are fixed by the two stroke lengths and are not infinitely adjustable.
The SCT integrates two piston sections on a single common rod, guaranteeing a fixed spatial relationship between the 75 mm and 125 mm stops. This eliminates the need to synchronise two separate cylinders and align external hard stops, saving setup time and reducing the machine footprint.
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