Airtac SCT32-63 Multi-Position Tandem Air Cylinder SCT63X55X25
The AirTAC Airtac SCT32-63 Multi-Position Tandem Air Cylinder SCT63X55X25 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 Ø63mm bore, PT1/4 ports and adjustable end cushioning.
- BoreØ63 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 SCT63X55X25
The AirTAC SCT63X55X25 is a double-acting multi-position cylinder that delivers four distinct rod positions: 0 mm (fully retracted), 25 mm, 55 mm, and the combined total travel of 80 mm. By pressurizing the two piston sections independently or together, it provides fixed mechanical stops for tasks requiring repeatable intermediate positioning without complex servo controls. Each actuated section generates a push force of 1559 N at 0.5 MPa, rising to 2805 N at the maximum operating pressure of 0.9 MPa.
Built on a durable tie-rod construction with a 20 mm diameter piston rod and M16x1.5 rod thread, this 63 mm bore cylinder features a 28 mm adjustable air cushion for smooth end-of-stroke deceleration. The body length A(SCT) is 249 mm, and the standard PT1/4 ports ensure straightforward pneumatic integration. This basic configuration comes with TPU seals for a standard operating range of -20 to +70 °C.
Airtac SCT32-63 Multi-Position Tandem Air Cylinder SCT63X55X25 Technical Specifications
| Model | Airtac SCT32-63 Multi-Position Tandem Air Cylinder SCT63X55X25 |
|---|---|
| Series | SCT multi-position tie-rod cylinder |
| Bore size | Ø63 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 | 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, 28 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 (Ø63mm)
| Pressure | Push force | Pull force |
|---|---|---|
| 0.5 MPa | 1559 N | 1402 N |
| 0.7 MPa | 2182 N | — |
| Max (@1.0 MPa) | 318 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 SCT63X55X25
| SCT | Multi-position (tandem) tie-rod cylinder series. |
|---|---|
| 63 | 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 SCT63X55X25 Is Used
Two-Stage Sorting Gate
Uses the 25 mm and 55 mm positions to divert parts to two separate lanes from a single conveyor, with the 80 mm total travel providing a third divert path or a park position.
Multi-Depth Pressing
Achieves two controlled pressing depths (25 mm and 55 mm) in one compact unit, ideal for assembly operations requiring a shallow pre-insertion followed by a deeper final press.
Sequential Part Feeding
The 0, 25, 55, and 80 mm positions allow a single cylinder to meter and separate components from a magazine, feeding them into a machine in a precise, timed sequence.
Is the Airtac SCT32-63 Multi-Position Tandem Air Cylinder SCT63X55X25 the Right Cylinder?
Select the SCT63X55X25 when your application requires four fixed mechanical positions with a total travel of 80 mm, eliminating the complexity and cost of two separate cylinders with external stops. If your force requirements are lower, stepping down to a 50 mm bore reduces the per-section push force to 982 N at 0.5 MPa, while moving up to an 80 mm bore increases it to 2513 N. For a direct replacement, ensure the new unit matches the 63 mm bore, both strokes of 55 mm and 25 mm, PT port thread, and basic mounting configuration.
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 SCT63X55X25 FAQ
This tandem cylinder provides 4 discrete mechanical stop positions because its two strokes are different lengths. The reachable rod positions are 0 mm (fully retracted), 25 mm, 55 mm, and the total extended length of 80 mm.
Yes, it is designed to replace a setup using two separate cylinders and external hard stops to achieve three or four fixed positions. A replacement SCT must have the same 63 mm bore, 55 mm and 25 mm strokes, and matching port thread (PT) to be a drop-in fit.
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