Airtac SCT32-63 Multi-Position Tandem Air Cylinder SCT50X55X40
The AirTAC Airtac SCT32-63 Multi-Position Tandem Air Cylinder SCT50X55X40 is a genuine double-acting MULTI-POSITION (tandem) air cylinder: two piston sections of 55mm and 40mm give 4 controllable stop positions across a 95mm total travel, with a Ø50mm bore, PT1/4 ports and adjustable end cushioning.
- BoreØ50 mm
- Stroke 155 mm
- Stroke 240 mm
- Total travel95 mm
- Positions4 stops
- Port sizePT1/4
About the Airtac SCT32-63 Multi-Position Tandem Air Cylinder SCT50X55X40
The AirTAC SCT50X55X40 is a double-acting multi-position tandem cylinder that delivers four distinct rod positions from two integrated piston sections. With stroke1 set at 55 mm and stroke2 at 40 mm, the reachable stops are 0 mm (fully retracted), 40 mm, 55 mm, and the total travel of 95 mm. Each 50 mm bore section generates a push force of 982 N at 0.5 MPa, rising to 1767 N at the maximum operating pressure of 0.9 MPa, driven through a 20 mm diameter piston rod.
Built on a durable tie-rod construction with a 243 mm body length A(SCT), this cylinder uses adjustable pneumatic cushioning with a 21 mm cushion length to decelerate the load quietly at each end of the stroke. The standard PT1/4 ports and M16x1.5 rod thread make it straightforward to integrate into pneumatic circuits. It operates on filtered air across a pressure range of 0.15 to 1.0 MPa and a temperature span of -20 to +70 °C with its default TPU seals.
Airtac SCT32-63 Multi-Position Tandem Air Cylinder SCT50X55X40 Technical Specifications
| Model | Airtac SCT32-63 Multi-Position Tandem Air Cylinder SCT50X55X40 |
|---|---|
| Series | SCT multi-position tie-rod cylinder |
| Bore size | Ø50 mm |
| Stroke 1 / Stroke 2 | 55 / 40 mm |
| Total travel | 95 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) | 55 mm |
| P2 (section 2) | 40 mm |
| P3 (both extended) | 95 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 SCT50X55X40
| SCT | Multi-position (tandem) tie-rod cylinder series. |
|---|---|
| 50 | Bore size in mm (SCT range 32–100). |
| ×55 | Stroke 1 (section 1) in mm. |
| ×40 | 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 SCT50X55X40 Is Used
Two-Stage Sorting Gate
Uses the 40 mm and 55 mm positions to divert packages to two different conveyor lanes, with 0 mm as the home position and 95 mm for a third reject lane.
Multi-Depth Part Insertion
Pushes a component to a 40 mm press-fit depth for one product variant and a 55 mm depth for another, all within a single automated assembly cell.
Sequential Clamping Fixture
Applies a light clamp at the 40 mm stroke for delicate positioning, then a full-force clamp at 95 mm total travel, using the 55 mm stop for an intermediate release step.
Is the Airtac SCT32-63 Multi-Position Tandem Air Cylinder SCT50X55X40 the Right Cylinder?
Select the SCT50X55X40 when your application requires a compact, single-cylinder solution to achieve four fixed stopping points, eliminating the complexity and cost of mounting two separate cylinders with external hard stops. This model is ideal for sequences needing two intermediate positions between fully retracted and fully extended. If your force requirements are lower, stepping down to a 40 mm bore reduces the per-section push force to 628 N at 0.5 MPa, while an 80 mm bore increases it to 2513 N for heavier guided loads.
For a direct replacement, match an AirTAC SCT with a 50 mm bore and both the 55 mm and 40 mm section strokes, ensuring the port thread is PT and the mounting is basic. Since the longest section stroke here is 55 mm, rod buckling is not a primary concern, but always ensure the load is guided to prevent side-loading on the rod bearing.
Multi-position checklist
- ✓ Need 4 repeatable stops?
- ✓ Section strokes 55 + 40 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 SCT50X55X40 FAQ
This model provides 4 discrete mechanical stops. The rod positions are 0 mm (fully retracted), 40 mm (stroke2 only), 55 mm (stroke1 only), and the total extended length of 95 mm (both sections actuated).
Yes, if your sequence requires stops at 40 mm and 55 mm. The SCT tandem design integrates both strokes on a single rod line, saving mounting space and simplifying valving compared to using two individual SC cylinders with external stoppers. Ensure the porting and mounting style match your existing setup.
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