Airtac SCT32-63 Multi-Position Tandem Air Cylinder SCT40X250X270
The AirTAC Airtac SCT32-63 Multi-Position Tandem Air Cylinder SCT40X250X270 is a genuine double-acting MULTI-POSITION (tandem) air cylinder: two piston sections of 250mm and 270mm give 4 controllable stop positions across a 520mm total travel, with a Ø40mm bore, PT1/4 ports and adjustable end cushioning.
- BoreØ40 mm
- Stroke 1250 mm
- Stroke 2270 mm
- Total travel520 mm
- Positions4 stops
- Port sizePT1/4
About the Airtac SCT32-63 Multi-Position Tandem Air Cylinder SCT40X250X270
The AirTAC SCT40X250X270 is a tie-rod tandem cylinder delivering four distinct, repeatable rod positions: 0 mm (fully retracted), 250 mm, 270 mm, and the total travel of 520 mm. By pressurizing either or both of its two piston sections, this double-acting multi-position actuator replaces complex setups involving multiple cylinders and external hard stops. Each 40 mm bore section generates a push force of 628 N at 0.5 MPa, scaling up to a thrust of 1130 N at the maximum operating pressure of 0.9 MPa.
Designed with a 16 mm diameter piston rod and PT1/4 ports, the cylinder body has an A(SCT) dimension of 235 mm and features an adjustable pneumatic cushion of 21 mm at each end to absorb energy smoothly. The standard TPU seals provide reliable operation in ambient temperatures from -20 to +70 °C. This basic configuration has no mounting brackets, offering a clean barrel profile for custom fixture designs.
Airtac SCT32-63 Multi-Position Tandem Air Cylinder SCT40X250X270 Technical Specifications
| Model | Airtac SCT32-63 Multi-Position Tandem Air Cylinder SCT40X250X270 |
|---|---|
| Series | SCT multi-position tie-rod cylinder |
| Bore size | Ø40 mm |
| Stroke 1 / Stroke 2 | 250 / 270 mm |
| Total travel | 520 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) | 250 mm |
| P2 (section 2) | 270 mm |
| P3 (both extended) | 520 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 SCT40X250X270
| SCT | Multi-position (tandem) tie-rod cylinder series. |
|---|---|
| 40 | Bore size in mm (SCT range 32–100). |
| ×250 | Stroke 1 (section 1) in mm. |
| ×270 | 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 SCT40X250X270 Is Used
Four-Position Sorting Gate
Direct packages to four different conveyor lanes by stopping the cylinder rod at 0, 250, 270, and 520 mm. Each distinct stop aligns a diverter arm with a specific chute, simplifying multi-lane sorting with a single pneumatic device.
Two-Depth Pressing Station
Perform a shallow pre-press at the 250 mm stroke and a deeper final press at the 520 mm total travel. The intermediate 270 mm position can be used for a separate part-ejection step, all within one compact tandem cylinder.
Multi-Step Assembly Fixture
Control a tooling plate through four distinct heights for a sequential assembly process. The 40 mm bore provides 628 N of push force per section, sufficient for clamping, inserting, and staking operations in a small footprint.
Is the Airtac SCT32-63 Multi-Position Tandem Air Cylinder SCT40X250X270 the Right Cylinder?
Select the SCT40X250X270 when an application requires a 40 mm bore actuator to stop precisely at four predetermined locations along a 520 mm stroke, eliminating the cost and control complexity of servo positioning. If your force requirement is lower, stepping down to a 32 mm bore reduces the per-section push force to 402 N at 0.5 MPa; for heavier loads, a 50 mm bore provides 982 N per section. As a direct replacement, match this exact model code to preserve the non-equal stroke combination (250 mm and 270 mm), the PT port thread, and the basic mounting style.
Given the extended 250 mm and 270 mm section strokes, ensure the external load is guided to prevent excessive side-loading and rod bending, especially when the rod is near full extension. If the tandem cylinder is used vertically, an external mechanical lock or pilot-operated check valve is necessary to securely hold a position when air pressure is exhausted or lost.
Multi-position checklist
- ✓ Need 4 repeatable stops?
- ✓ Section strokes 250 + 270 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 SCT40X250X270 FAQ
This tandem cylinder provides four discrete mechanical stops. The rod positions are 0 mm (fully retracted), 250 mm (first section extended), 270 mm (second section extended), and 520 mm (both sections extended for total travel). These positions are fixed by the two piston strokes and are not infinitely adjustable.
Yes, it is designed to do exactly that in a more compact package. The SCT40X250X270 integrates two strokes on a single common rod, providing four fixed positions without the alignment issues and extra mounting hardware required by two independent cylinders. For a drop-in replacement, ensure the new SCT matches the 40 mm bore, the 250 mm and 270 mm strokes, and the PT port thread.
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