Airtac SCT32-63 Multi-Position Tandem Air Cylinder SCT63X25X400S
The AirTAC Airtac SCT32-63 Multi-Position Tandem Air Cylinder SCT63X25X400S is a genuine double-acting MULTI-POSITION (tandem) air cylinder: two piston sections of 25mm and 400mm give 4 controllable stop positions across a 425mm total travel, with a Ø63mm bore, PT1/4 ports and adjustable end cushioning.
- BoreØ63 mm
- Stroke 125 mm
- Stroke 2400 mm
- Total travel425 mm
- Positions4 stops
- Port sizePT1/4
About the Airtac SCT32-63 Multi-Position Tandem Air Cylinder SCT63X25X400S
The SCT63X25X400S is a double-acting multi-position tandem cylinder that delivers four fixed rod positions: 0 mm (fully retracted), 25 mm, 400 mm, and 425 mm (total travel). Each piston section generates 1559 N of push force at 0.5 MPa, driven through a 20 mm diameter rod with PT1/4 ports. The 28 mm adjustable air cushion at each end provides smooth deceleration across the full speed range of 30-800 mm/s.
A built-in magnet allows CMSG, DMSG, or EMSG sensors to clamp directly onto the tie-rod barrel for non-contact position sensing. The body length A(SCT) is 249 mm, making it a compact solution for tasks requiring a short initial advance and a long secondary stroke. This model uses standard TPU seals for an operating temperature range of -20 to +70 °C and PT threads.
Airtac SCT32-63 Multi-Position Tandem Air Cylinder SCT63X25X400S Technical Specifications
| Model | Airtac SCT32-63 Multi-Position Tandem Air Cylinder SCT63X25X400S |
|---|---|
| Series | SCT multi-position tie-rod cylinder |
| Bore size | Ø63 mm |
| Stroke 1 / Stroke 2 | 25 / 400 mm |
| Total travel | 425 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) | 25 mm |
| P2 (section 2) | 400 mm |
| P3 (both extended) | 425 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 SCT63X25X400S
| SCT | Multi-position (tandem) tie-rod cylinder series. |
|---|---|
| 63 | Bore size in mm (SCT range 32–100). |
| ×25 | Stroke 1 (section 1) in mm. |
| ×400 | 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 SCT63X25X400S Is Used
Two-Stage Sorting Gate
Uses the 25 mm stroke to divert a part from a main lane and the 400 mm stroke to fully eject it onto a separate conveyor, all with sensor-confirmed positions.
Dual-Depth Press Feeding
Advances a workpiece 25 mm for a shallow pre-form operation, then extends to the full 425 mm position for a deep draw, providing two working depths from one cylinder.
Staggered Part Transfer
Picks a component at 0 mm, moves it 400 mm across a station, and uses the 25 mm intermediate stop for a mid-transfer inspection or orientation check.
Is the Airtac SCT32-63 Multi-Position Tandem Air Cylinder SCT63X25X400S the Right Cylinder?
This 4-position cylinder replaces complex setups using two separate cylinders or an SC cylinder with external hard stops, simplifying plumbing and control logic. The 25 mm stroke handles a precise short placement, while the 400 mm section provides the main transfer. If higher force is needed, stepping up to the SCT80 bore increases push force to 2513 N per section at 0.5 MPa. For a direct replacement, match the 63 mm bore, both 25 mm and 400 mm strokes, the PT port thread, and the built-in magnet (-S suffix). Given the 400 mm stroke on the second section, ensure the rod is adequately guided if significant side loads are present to prevent bending.
Multi-position checklist
- ✓ Need 4 repeatable stops?
- ✓ Section strokes 25 + 400 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 SCT63X25X400S FAQ
This tandem cylinder provides four discrete mechanical stops: 0 mm (fully retracted), 25 mm (first section extended), 400 mm (second section extended), and 425 mm (both sections extended). The positions are fixed by the two stroke lengths and are selected by pressurizing the appropriate air ports.
Yes, it can often replace two separate cylinders performing a two-step linear move, simplifying mounting and reducing the number of valves required. A direct replacement for another SCT63X25X400S must match the 63 mm bore, both the 25 mm and 400 mm strokes, the PT port thread, and the built-in magnet (-S) for sensor compatibility.
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