Airtac SCT32-63 Multi-Position Tandem Air Cylinder SCT63X180X70
The AirTAC Airtac SCT32-63 Multi-Position Tandem Air Cylinder SCT63X180X70 is a genuine double-acting MULTI-POSITION (tandem) air cylinder: two piston sections of 180mm and 70mm give 4 controllable stop positions across a 250mm total travel, with a Ø63mm bore, PT1/4 ports and adjustable end cushioning.
- BoreØ63 mm
- Stroke 1180 mm
- Stroke 270 mm
- Total travel250 mm
- Positions4 stops
- Port sizePT1/4
About the Airtac SCT32-63 Multi-Position Tandem Air Cylinder SCT63X180X70
The AirTAC SCT63X180X70 is a double-acting multi-position tandem cylinder that delivers four distinct rod positions without external hard stops. By pressurising its two piston sections independently or together, the rod locates precisely at 0 mm (fully retracted), 70 mm, 180 mm, or the full combined travel of 250 mm. Each 63 mm bore section generates 1559 N of push force at 0.5 MPa, rising to 2805 N at the maximum operating pressure of 0.9 MPa.
This tie-rod cylinder uses a 20 mm diameter piston rod with an M16x1.5 male thread and PT1/4 ports. Its adjustable pneumatic cushioning absorbs end-of-stroke impact over a 28 mm cushion length, protecting the assembly at speeds up to 800 mm/s. The body length A(SCT) is 249 mm plus the two stroke lengths, making it a compact alternative to mounting two separate actuators for multi-stop tasks.
Airtac SCT32-63 Multi-Position Tandem Air Cylinder SCT63X180X70 Technical Specifications
| Model | Airtac SCT32-63 Multi-Position Tandem Air Cylinder SCT63X180X70 |
|---|---|
| Series | SCT multi-position tie-rod cylinder |
| Bore size | Ø63 mm |
| Stroke 1 / Stroke 2 | 180 / 70 mm |
| Total travel | 250 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) | 180 mm |
| P2 (section 2) | 70 mm |
| P3 (both extended) | 250 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 SCT63X180X70
| SCT | Multi-position (tandem) tie-rod cylinder series. |
|---|---|
| 63 | Bore size in mm (SCT range 32–100). |
| ×180 | Stroke 1 (section 1) in mm. |
| ×70 | 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 SCT63X180X70 Is Used
Two-Stage Part Diverting
Uses the 70 mm stroke to clear a gate and the 180 mm stroke to push a package fully onto a secondary conveyor lane, providing three active divert positions from one compact unit.
Multi-Depth Press Operations
Achieves a light touch at 70 mm for component placement, a partial press at 180 mm for initial forming, and a full-depth press at the combined 250 mm travel in a progressive assembly station.
Sequential Clamping & Feeding
Advances a workpiece 70 mm into a fixture for a first operation, then moves it the full 250 mm to a second machining station, all controlled by a single SCT cylinder and a pair of 5/3 valves.
Is the Airtac SCT32-63 Multi-Position Tandem Air Cylinder SCT63X180X70 the Right Cylinder?
Select the SCT63X180X70 when your application requires four fixed mechanical stops and you want to eliminate the complexity of dual-cylinder setups with external brackets. The 180 mm and 70 mm stroke combination is ideal for sequences where a short intermediate position is followed by a longer advance. If your force requirement is lower, consider stepping down to the 50 mm bore SCT series, which provides 982 N of push per section at 0.5 MPa. For a direct replacement, match the 63 mm bore, both the 180 mm and 70 mm strokes, PT port thread, and basic mounting configuration. Since the longer 180 mm section stroke approaches half a meter, ensure the rod is adequately guided if significant side loads are present during extension to prevent bending.
Multi-position checklist
- ✓ Need 4 repeatable stops?
- ✓ Section strokes 180 + 70 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 SCT63X180X70 FAQ
This tandem cylinder has four discrete rod positions: 0 mm (fully retracted), 70 mm (section 2 extended), 180 mm (section 1 extended), and 250 mm (both sections extended). The positions are fixed by the two stroke lengths and are not infinitely adjustable.
The SCT integrates both strokes onto a single common rod and piston assembly, which saves mounting space and eliminates the need to align two separate cylinder bodies. It also reduces the number of flow controls and bracketry required, though the per-section thrust remains identical to a standard SC63 cylinder at the same pressure.
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