Airtac SCT32-63 Multi-Position Tandem Air Cylinder SCT40X55X25
The AirTAC Airtac SCT32-63 Multi-Position Tandem Air Cylinder SCT40X55X25 is a genuine double-acting MULTI-POSITION (tandem) air cylinder: two piston sections of 55mm and 25mm give 4 controllable stop positions across a 80mm total travel, with a Ø40mm bore, PT1/4 ports and adjustable end cushioning.
- BoreØ40 mm
- Stroke 155 mm
- Stroke 225 mm
- Total travel80 mm
- Positions4 stops
- Port sizePT1/4
About the Airtac SCT32-63 Multi-Position Tandem Air Cylinder SCT40X55X25
The SCT40X55X25 is a double-acting multi-position tandem cylinder that provides four distinct rod positions: fully retracted (0 mm), 25 mm, 55 mm, and the total extended travel of 80 mm. Each piston section delivers a push force of 628 N at 0.5 MPa, making it a compact solution for tasks requiring multiple fixed stops without complex servo controls.
Built on a robust tie-rod design with a 16 mm diameter rod and M12x1.25 rod thread, this cylinder features a 21 mm adjustable air cushion for smooth end-of-stroke deceleration. The PT1/4 port and a body length of 235 mm make it easy to integrate into pneumatic circuits requiring sequenced positioning.
Airtac SCT32-63 Multi-Position Tandem Air Cylinder SCT40X55X25 Technical Specifications
| Model | Airtac SCT32-63 Multi-Position Tandem Air Cylinder SCT40X55X25 |
|---|---|
| Series | SCT multi-position tie-rod cylinder |
| Bore size | Ø40 mm |
| Stroke 1 / Stroke 2 | 55 / 25 mm |
| Total travel | 80 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) | 55 mm |
| P2 (section 2) | 25 mm |
| P3 (both extended) | 80 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 SCT40X55X25
| SCT | Multi-position (tandem) tie-rod cylinder series. |
|---|---|
| 40 | Bore size in mm (SCT range 32–100). |
| ×55 | Stroke 1 (section 1) in mm. |
| ×25 | 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 SCT40X55X25 Is Used
Two-Stage Sorting Gate
Uses the 25 mm and 55 mm positions to divert packages to two separate conveyor lanes, with 0 mm as the home position and 80 mm for a reject chute.
Multi-Depth Insertion
Pushes components to two different insertion depths (25 mm and 55 mm) in an assembly fixture, ensuring precise placement without over-travel.
Sequenced Clamping
Applies a light clamp at the 25 mm stroke for alignment, followed by full clamping force at the 55 mm stroke, all from a single compact actuator.
Is the Airtac SCT32-63 Multi-Position Tandem Air Cylinder SCT40X55X25 the Right Cylinder?
Choose the SCT40X55X25 when your application needs four fixed mechanical stops from a single pneumatic unit, avoiding the cost and complexity of two separate cylinders with external hard stops. If your force requirements are lower, stepping down to a 32 mm bore provides 402 N of push force per section, while moving up to a 50 mm bore increases it to 982 N.
For a direct replacement, match the 40 mm bore, both strokes (55 mm and 25 mm), PT thread, and basic mounting configuration. If a section stroke exceeds 300 mm, consider adding external guide rods to manage side loads and prevent rod bending.
Multi-position checklist
- ✓ Need 4 repeatable stops?
- ✓ Section strokes 55 + 25 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 SCT40X55X25 FAQ
This model provides four discrete mechanical stop positions: 0 mm (fully retracted), 25 mm, 55 mm, and the combined total travel of 80 mm. Positions are selected by pressurizing the front section, rear section, or both simultaneously.
Yes, it is designed to replace setups that use two separate cylinders to achieve three or four fixed positions. Ensure the replacement matches the 40 mm bore, the specific 55 mm and 25 mm strokes, PT ports, and the basic mounting style to maintain identical mounting geometry and force output.
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