Airtac SCT32-63 Multi-Position Tandem Air Cylinder SCT40X50X20
The AirTAC Airtac SCT32-63 Multi-Position Tandem Air Cylinder SCT40X50X20 is a genuine double-acting MULTI-POSITION (tandem) air cylinder: two piston sections of 50mm and 20mm give 4 controllable stop positions across a 70mm total travel, with a Ø40mm bore, PT1/4 ports and adjustable end cushioning.
- BoreØ40 mm
- Stroke 150 mm
- Stroke 220 mm
- Total travel70 mm
- Positions4 stops
- Port sizePT1/4
About the Airtac SCT32-63 Multi-Position Tandem Air Cylinder SCT40X50X20
The SCT40X50X20 is a double-acting multi-position cylinder that delivers four distinct rod positions from a single tie-rod body: fully retracted (0 mm), 50 mm, 20 mm, and the combined total travel of 70 mm. Each 40 mm bore section generates 628 N of push force at 0.5 MPa, driven by a 16 mm diameter piston rod through PT1/4 ports.
With a 21 mm adjustable air cushion on each end and a body length of 235 mm, this tandem unit replaces complex two-cylinder setups in a compact footprint. It operates on filtered air from 0.15 to 1.0 MPa, reaching 1130 N of thrust per section at the maximum 0.9 MPa operating pressure.
Airtac SCT32-63 Multi-Position Tandem Air Cylinder SCT40X50X20 Technical Specifications
| Model | Airtac SCT32-63 Multi-Position Tandem Air Cylinder SCT40X50X20 |
|---|---|
| Series | SCT multi-position tie-rod cylinder |
| Bore size | Ø40 mm |
| Stroke 1 / Stroke 2 | 50 / 20 mm |
| Total travel | 70 mm |
| Stop positions | 4 positions |
| Acting type | Double acting (tandem, multi-position) |
| Port size | PT1/4 |
| Rod thread | M12×1.25 |
| 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) | 50 mm |
| P2 (section 2) | 20 mm |
| P3 (both extended) | 70 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 (Ø40mm)
| Pressure | Push force | Pull force |
|---|---|---|
| 0.5 MPa | 628 N | 528 N |
| 0.7 MPa | 880 N | — |
| Max (@1.0 MPa) | 128 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 SCT40X50X20
| SCT | Multi-position (tandem) tie-rod cylinder series. |
|---|---|
| 40 | Bore size in mm (SCT range 32–100). |
| ×50 | 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 SCT40X50X20 Is Used
Two-Stop Diverter Gate
Actuates a sorting gate to three positions—retracted, 20 mm for one lane, and 50 mm for a second lane—using simple pneumatic controls.
Multi-Depth Pressing
Provides two distinct pressing depths (20 mm and 50 mm) in a light assembly fixture, with the 70 mm total stroke used for part ejection.
Staged Part Feeding
Advances components in two controlled steps: a 20 mm singulation move followed by a 50 mm transfer stroke, all from one compact cylinder body.
Is the Airtac SCT32-63 Multi-Position Tandem Air Cylinder SCT40X50X20 the Right Cylinder?
Choose the SCT40X50X20 when your process needs two different extension lengths—here 50 mm and 20 mm—plus the full 70 mm reach, all from one actuator. This saves mounting space and eliminates the need to synchronize two separate cylinders. If your load requires more force, stepping up to the 50 mm bore SCT provides 982 N of push per section at 0.5 MPa.
For a drop-in replacement, match the 40 mm bore, both strokes (50 mm and 20 mm), PT port thread, and basic mounting. If your application uses magnetic sensors, specify the -S suffix to add a built-in magnet for CMSG/DMSG/EMSG switch mounting.
Multi-position checklist
- ✓ Need 4 repeatable stops?
- ✓ Section strokes 50 + 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 SCT40X50X20 FAQ
It provides four discrete rod positions: 0 mm (fully retracted), 50 mm (section one extended), 20 mm (section two extended), and 70 mm (both sections extended, total travel).
Yes, if your application requires two different fixed extension lengths. The SCT40X50X20 combines both strokes in one tie-rod body, reducing mounting hardware and eliminating timing issues. Ensure the 40 mm bore force (628 N push at 0.5 MPa) meets your load requirements.
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