Airtac SCT32-63 Multi-Position Tandem Air Cylinder SCT40X305.5X305.5
The AirTAC Airtac SCT32-63 Multi-Position Tandem Air Cylinder SCT40X305.5X305.5 is a genuine double-acting MULTI-POSITION (tandem) air cylinder: two piston sections of 305.5mm and 305.5mm give 3 controllable stop positions across a 611.0mm total travel, with a Ø40mm bore, PT1/4 ports and adjustable end cushioning.
- BoreØ40 mm
- Stroke 1305.5 mm
- Stroke 2305.5 mm
- Total travel611.0 mm
- Positions3 stops
- Port sizePT1/4
About the Airtac SCT32-63 Multi-Position Tandem Air Cylinder SCT40X305.5X305.5
The SCT40X305.5X305.5 is a double-acting multi-position tandem cylinder that delivers three distinct rod positions: fully retracted (0 mm), an intermediate stop at 305.5 mm, and full extension at 611 mm. Each piston section generates 628 N of push force at 0.5 MPa, rising to 1130 N at 0.9 MPa, driven through a 16 mm diameter rod with PT1/4 ports.
Built on a durable tie-rod design with a 235 mm body length A(SCT), this cylinder uses adjustable pneumatic cushioning to decelerate the load at each end of the 305.5 mm stroke sections. The standard TPU seals and PT thread configuration suit general industrial environments operating between -20 and +70 °C.
Airtac SCT32-63 Multi-Position Tandem Air Cylinder SCT40X305.5X305.5 Technical Specifications
| Model | Airtac SCT32-63 Multi-Position Tandem Air Cylinder SCT40X305.5X305.5 |
|---|---|
| Series | SCT multi-position tie-rod cylinder |
| Bore size | Ø40 mm |
| Stroke 1 / Stroke 2 | 305.5 / 305.5 mm |
| Total travel | 611.0 mm |
| Stop positions | 3 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 (3)
| Position | Rod extension |
|---|---|
| P0 (retracted) | 0 mm |
| P1 (section 1) | 305.5 mm |
| P2 (both extended) | 611.0 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 SCT40X305.5X305.5
| SCT | Multi-position (tandem) tie-rod cylinder series. |
|---|---|
| 40 | Bore size in mm (SCT range 32–100). |
| ×305.5 | Stroke 1 (section 1) in mm. |
| ×305.5 | 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 SCT40X305.5X305.5 Is Used
Three-Position Diverter
Operates a gate or chute with three defined positions—retracted, mid-point, and extended—to route packages or materials to separate lanes on a conveyor.
Multi-Stop Pusher
Advances a product carrier to two distinct workstations along a linear slide, stopping precisely at 305.5 mm for inspection and 611 mm for ejection.
Dual-Depth Pressing
Provides two controlled pressing depths in a single cycle, using the intermediate 305.5 mm stop for a pre-forming operation before the final 611 mm stroke.
Is the Airtac SCT32-63 Multi-Position Tandem Air Cylinder SCT40X305.5X305.5 the Right Cylinder?
Choose this SCT model when your process needs a repeatable three-stop sequence without the complexity of two independent cylinders and external hard stops. The 40 mm bore provides a balanced force profile for light-to-medium transfer and sorting tasks. If higher thrust is required, stepping up to the 50 mm bore delivers 982 N of push force per section at 0.5 MPa.
For a direct replacement, match the 40 mm bore, both 305.5 mm strokes, PT port thread, and basic mounting configuration. With each section stroke exceeding 300 mm, ensure the external load is guided or supported to prevent excessive side-loading and rod bending, especially when approaching the 611 mm total extension.
Multi-position checklist
- ✓ Need 3 repeatable stops?
- ✓ Section strokes 305.5 + 305.5 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 SCT40X305.5X305.5 FAQ
It provides three discrete mechanical stops: 0 mm (fully retracted), 305.5 mm (first section extended), and 611 mm (both sections extended). Because both stroke sections are equal, the mid-position is exactly halfway through the total travel.
Yes, it is a common replacement when you need a compact, pre-aligned three-position actuator. To match it, you need an SCT with a 40 mm bore, both strokes set to 305.5 mm, PT ports, and basic mounting. The tandem design eliminates the alignment and control complexity of two separate cylinders.
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