Airtac SCT32-63 Multi-Position Tandem Air Cylinder SCT50X180X20
The AirTAC Airtac SCT32-63 Multi-Position Tandem Air Cylinder SCT50X180X20 is a genuine double-acting MULTI-POSITION (tandem) air cylinder: two piston sections of 180mm and 20mm give 4 controllable stop positions across a 200mm total travel, with a Ø50mm bore, PT1/4 ports and adjustable end cushioning.
- BoreØ50 mm
- Stroke 1180 mm
- Stroke 220 mm
- Total travel200 mm
- Positions4 stops
- Port sizePT1/4
About the Airtac SCT32-63 Multi-Position Tandem Air Cylinder SCT50X180X20
The SCT50X180X20 is a tandem double-acting pneumatic cylinder that provides four fixed rod positions from its two integrated piston sections. By pressurising the 20 mm section, the 180 mm section, or both together, the rod locates precisely at 0 mm (retracted), 20 mm, 180 mm, or the full combined travel of 200 mm. Each 50 mm bore section generates 982 N of push force at 0.5 MPa, rising to 1767 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. The adjustable pneumatic cushion at each end cap provides 21 mm of deceleration to manage inertial loads quietly. The body length A(SCT) is 243 mm plus the two stroke lengths, making it a compact solution for sequencing tasks that would otherwise require two separate cylinders and external stops.
Airtac SCT32-63 Multi-Position Tandem Air Cylinder SCT50X180X20 Technical Specifications
| Model | Airtac SCT32-63 Multi-Position Tandem Air Cylinder SCT50X180X20 |
|---|---|
| Series | SCT multi-position tie-rod cylinder |
| Bore size | Ø50 mm |
| Stroke 1 / Stroke 2 | 180 / 20 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, 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) | 180 mm |
| P2 (section 2) | 20 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 (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 SCT50X180X20
| SCT | Multi-position (tandem) tie-rod cylinder series. |
|---|---|
| 50 | Bore size in mm (SCT range 32–100). |
| ×180 | Stroke 1 (section 1) in mm. |
| ×20 | 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 SCT50X180X20 Is Used
Two-Stage Sorting Gate
The 180 mm stroke diverts parts to a primary lane, while the additional 20 mm stroke shifts a secondary gate flap for precise three-lane sorting on a conveyor line.
Dual-Depth Pressing
Use the 20 mm position for a light pre-press or component location check, then engage the full 200 mm travel for the main pressing operation, all from one compact actuator.
Sequential Clamping
The rod advances 180 mm to close a safety guard, then makes a final 20 mm movement to engage a locking pin, ensuring a two-step safety interlock before a machine cycle starts.
Is the Airtac SCT32-63 Multi-Position Tandem Air Cylinder SCT50X180X20 the Right Cylinder?
Choose the SCT50X180X20 when your application needs a long primary advance of 180 mm followed by a short 20 mm positioning stroke, or vice-versa, without the complexity of mounting and plumbing two independent actuators. The four discrete positions are ideal for two-step feeding or sorting mechanisms. If the 982 N push force per section at 0.5 MPa is insufficient, stepping up to a 63 mm bore provides 1559 N per section. For a direct replacement, match the 50 mm bore, both the 180 mm and 20 mm strokes, PT port thread, and basic mounting configuration. When extending the rod to the full 200 mm travel, ensure the load is guided to prevent side-loading and rod deflection.
Multi-position checklist
- ✓ Need 4 repeatable stops?
- ✓ Section strokes 180 + 20 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 SCT50X180X20 FAQ
This tandem cylinder has four discrete rod positions: 0 mm (fully retracted), 20 mm (short stroke section extended), 180 mm (long stroke section extended), and 200 mm (both sections extended, total travel). The positions are fixed by the two stroke lengths and are not infinitely adjustable.
No, the air cushion and multi-position feature do not provide load holding. If air pressure is lost or a directional valve is centered, the piston can drift. To securely hold a load at any of the four positions, you must add an external rod lock, a mechanical brake, or a pilot-operated check valve in the circuit.
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