Airtac SCT32-63 Multi-Position Tandem Air Cylinder SCT63X125X25S
The AirTAC Airtac SCT32-63 Multi-Position Tandem Air Cylinder SCT63X125X25S is a genuine double-acting MULTI-POSITION (tandem) air cylinder: two piston sections of 125mm and 25mm give 4 controllable stop positions across a 150mm total travel, with a Ø63mm bore, PT1/4 ports and adjustable end cushioning.
- BoreØ63 mm
- Stroke 1125 mm
- Stroke 225 mm
- Total travel150 mm
- Positions4 stops
- Port sizePT1/4
About the Airtac SCT32-63 Multi-Position Tandem Air Cylinder SCT63X125X25S
The SCT63X125X25S is a tandem multi-position cylinder that delivers four discrete rod stops: fully retracted (0 mm), 25 mm, 125 mm, and the combined total travel of 150 mm. Each piston section generates 1559 N of push force at 0.5 MPa, driven by a 20 mm diameter rod through PT1/4 ports.
Operating on standard filtered air, this double-acting unit features a 28 mm adjustable air cushion on each section for end-of-stroke deceleration. The integrated -S magnet allows direct mounting of CMSG/DMSG/EMSG sensors along the tie-rod barrel for position feedback, making it ready for multi-step sequencing without external switch rails.
Airtac SCT32-63 Multi-Position Tandem Air Cylinder SCT63X125X25S Technical Specifications
| Model | Airtac SCT32-63 Multi-Position Tandem Air Cylinder SCT63X125X25S |
|---|---|
| Series | SCT multi-position tie-rod cylinder |
| Bore size | Ø63 mm |
| Stroke 1 / Stroke 2 | 125 / 25 mm |
| Total travel | 150 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) | 125 mm |
| P2 (section 2) | 25 mm |
| P3 (both extended) | 150 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 SCT63X125X25S
| SCT | Multi-position (tandem) tie-rod cylinder series. |
|---|---|
| 63 | Bore size in mm (SCT range 32–100). |
| ×125 | 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 SCT63X125X25S Is Used
Two-Stage Part Diverter
Extend to 25 mm for a low-profile reject gate, or drive to 125 mm to divert parts onto a secondary conveyor lane, all from a single compact actuator.
Dual-Depth Pressing
Achieve a precise 25 mm pre-press position followed by a full 125 mm forming stroke, ensuring consistent material engagement in assembly or light stamping fixtures.
Multi-Stop Glue Dispensing
Position a dispensing head at 25 mm for edge bead application, then advance to 125 mm for a centre-line bead, with sensor confirmation at each stop via the built-in magnet.
Is the Airtac SCT32-63 Multi-Position Tandem Air Cylinder SCT63X125X25S the Right Cylinder?
Choose this 4-position SCT model when your process needs two distinct forward positions plus a home stop, avoiding the complexity and air consumption of two separate cylinders with external hard stops. If higher thrust is required, step up to the 80 mm bore, which provides 2513 N of push per section at the same 0.5 MPa pressure. For a direct replacement, match the 63 mm bore, the exact 125 mm and 25 mm section strokes, PT port thread, and the integrated magnet option; the basic mount configuration suits direct machine-face bolting. With the longer 125 mm stroke section, ensure the guided load is aligned to prevent side-loading and rod deflection during extension.
Multi-position checklist
- ✓ Need 4 repeatable stops?
- ✓ Section strokes 125 + 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 SCT63X125X25S FAQ
This tandem cylinder provides four distinct mechanical stops: 0 mm (fully retracted), 25 mm (section 2 extended), 125 mm (section 1 extended), and 150 mm (both sections extended). The positions are fixed by the two stroke lengths and are not infinitely adjustable.
Yes, it is designed to replace two separate cylinders used for two-position sequencing. A direct replacement must match the 63 mm bore, both the 125 mm and 25 mm strokes, PT port thread, and the -S magnet option. This SCT unit reduces plumbing and mounting hardware compared to a dual-cylinder setup.
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