Airtac SCT32-63 Multi-Position Tandem Air Cylinder SCT63X25X100S
The AirTAC Airtac SCT32-63 Multi-Position Tandem Air Cylinder SCT63X25X100S is a genuine double-acting MULTI-POSITION (tandem) air cylinder: two piston sections of 25mm and 100mm give 4 controllable stop positions across a 125mm total travel, with a Ø63mm bore, PT1/4 ports and adjustable end cushioning.
- BoreØ63 mm
- Stroke 125 mm
- Stroke 2100 mm
- Total travel125 mm
- Positions4 stops
- Port sizePT1/4
About the Airtac SCT32-63 Multi-Position Tandem Air Cylinder SCT63X25X100S
The SCT63X25X100S is a double-acting tandem cylinder that delivers four fixed rod positions: fully retracted (0 mm), 25 mm, 100 mm, and the combined total travel of 125 mm. Each piston section provides a push force of 1559 N at 0.5 MPa, scaling to 2805 N at the maximum operating pressure of 0.9 MPa.
This 63 mm bore unit features a 20 mm diameter piston rod with an M16x1.5 male thread and PT1/4 ports. The built-in magnet, denoted by the 'S' suffix, allows for direct mounting of CMSG, DMSG, or EMSG sensors along the tie-rod barrel for contactless position feedback. The body length A is 249 mm, and each end includes a 28 mm adjustable air cushion for smooth deceleration.
Airtac SCT32-63 Multi-Position Tandem Air Cylinder SCT63X25X100S Technical Specifications
| Model | Airtac SCT32-63 Multi-Position Tandem Air Cylinder SCT63X25X100S |
|---|---|
| Series | SCT multi-position tie-rod cylinder |
| Bore size | Ø63 mm |
| Stroke 1 / Stroke 2 | 25 / 100 mm |
| Total travel | 125 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) | 100 mm |
| P3 (both extended) | 125 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 SCT63X25X100S
| SCT | Multi-position (tandem) tie-rod cylinder series. |
|---|---|
| 63 | Bore size in mm (SCT range 32–100). |
| ×25 | Stroke 1 (section 1) in mm. |
| ×100 | 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 SCT63X25X100S Is Used
Two-Stage Sorting Gate
Uses the 25 mm and 100 mm stops to divert packages to two separate lanes from a single conveyor line, with sensor confirmation at each position via the built-in magnet.
Dual-Depth Pressing
Provides a 25 mm pre-press position and a 100 mm full-press stroke, allowing for a two-stage forming operation with a single compact actuator.
Multi-Stop Part Transfer
Shifts a workpiece carrier to three distinct stations (0, 25, 100 mm) along a linear guide, with the 125 mm position used for a safe park location during maintenance.
Is the Airtac SCT32-63 Multi-Position Tandem Air Cylinder SCT63X25X100S the Right Cylinder?
Select the SCT63X25X100S when an application requires a short initial advance and a longer secondary stroke, avoiding the complexity of two independent cylinders and external stops. The four distinct positions (0, 25, 100, 125 mm) are ideal for two-step feeding or sorting tasks. If higher force is needed, consider stepping up to the 80 mm bore, which provides 2513 N of push per section at 0.5 MPa.
For a direct replacement, match the 63 mm bore, both the 25 mm and 100 mm section strokes, PT port thread, and the S suffix for the integrated magnet. The basic mounting configuration accepts standard SCT accessories like foot mounts (LB) or flanges (FA/FB) if pivoting or panel mounting is later required.
Multi-position checklist
- ✓ Need 4 repeatable stops?
- ✓ Section strokes 25 + 100 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 SCT63X25X100S FAQ
This tandem cylinder provides four discrete mechanical stops: 0 mm (fully retracted), 25 mm (first section extended), 100 mm (second section extended), and 125 mm (both sections extended). The positions are fixed by the two internal piston strokes and are not infinitely adjustable.
The SCT combines two strokes on a single common rod, guaranteeing concentricity and reducing mounting space compared to two individual cylinders. It provides three or four precise, repeatable hard stops without needing external brackets or alignment fixtures, simplifying the machine design for sequenced linear movements.
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