Airtac SCT32-63 Multi-Position Tandem Air Cylinder SCT63X25X125S
The AirTAC Airtac SCT32-63 Multi-Position Tandem Air Cylinder SCT63X25X125S is a genuine double-acting MULTI-POSITION (tandem) air cylinder: two piston sections of 25mm and 125mm give 4 controllable stop positions across a 150mm total travel, with a Ø63mm bore, PT1/4 ports and adjustable end cushioning.
- BoreØ63 mm
- Stroke 125 mm
- Stroke 2125 mm
- Total travel150 mm
- Positions4 stops
- Port sizePT1/4
About the Airtac SCT32-63 Multi-Position Tandem Air Cylinder SCT63X25X125S
The SCT63X25X125S is a tandem multi-position pneumatic cylinder that delivers four fixed rod positions from its two piston sections: fully retracted (0 mm), first extension (25 mm), second extension (125 mm), and full combined travel (150 mm). Each 63 mm bore 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, driven through a rigid 20 mm diameter rod.
This model includes a factory-integrated magnet, allowing CMSG, DMSG, or EMSG solid-state sensors to be clamped directly onto the tie-rod barrel for non-contact position feedback at each stop. The cylinder body has an A-length of 249 mm and uses a 28 mm adjustable air cushion on each section to decelerate the load smoothly, making it suitable for sorting gates or multi-depth pressing tasks that require reliable, repeatable stopping points.
Airtac SCT32-63 Multi-Position Tandem Air Cylinder SCT63X25X125S Technical Specifications
| Model | Airtac SCT32-63 Multi-Position Tandem Air Cylinder SCT63X25X125S |
|---|---|
| Series | SCT multi-position tie-rod cylinder |
| Bore size | Ø63 mm |
| Stroke 1 / Stroke 2 | 25 / 125 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) | 25 mm |
| P2 (section 2) | 125 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 SCT63X25X125S
| SCT | Multi-position (tandem) tie-rod cylinder series. |
|---|---|
| 63 | Bore size in mm (SCT range 32–100). |
| ×25 | Stroke 1 (section 1) in mm. |
| ×125 | 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 SCT63X25X125S Is Used
Four-Position Diverter Gate
Routes packages or parts to four separate conveyor lanes by stopping the rod at 0, 25, 125, or 150 mm, with sensor confirmation at each position via the built-in magnet.
Multi-Depth Pressing & Staking
Provides two distinct pressing depths (25 mm and 125 mm) plus a full-retract home and a 150 mm clearance position, ideal for assemblies requiring staged insertion forces.
Staged Part Feeding
Advances components in three controlled steps from a vibratory bowl or magazine, using the 25 mm, 125 mm, and 150 mm stops to separate and stage parts for a pick-and-place.
Is the Airtac SCT32-63 Multi-Position Tandem Air Cylinder SCT63X25X125S the Right Cylinder?
Select the SCT63X25X125S when your application needs four distinct mechanical stops without the complexity of servo controls or multiple single-stroke cylinders and external hard stops. This tandem unit is more compact and simpler to plumb than two separate SC63 cylinders, as it shares a common rod line. If your force requirement is lower, stepping down to a 50 mm bore reduces per-section push to 982 N at 0.5 MPa, while stepping up to an 80 mm bore increases it to 2513 N. For replacement, match the 63 mm bore, both strokes of 25 mm and 125 mm, the PT port thread, and the integrated magnet (-S suffix).
Multi-position checklist
- ✓ Need 4 repeatable stops?
- ✓ Section strokes 25 + 125 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 SCT63X25X125S FAQ
This tandem cylinder provides four discrete mechanical stops: 0 mm (fully retracted), 25 mm (first section extended), 125 mm (second section extended), and 150 mm (both sections extended, total travel). The stops are fixed by the two stroke lengths and are not infinitely adjustable.
Yes, it is designed to replace two single-rod cylinders used in a push-pull or two-stop sequence, provided the required strokes are 25 mm and 125 mm. Ensure the replacement matches the 63 mm bore, PT ports, and the -S magnet option for sensor compatibility. The SCT uses a single rod, saving space and simplifying mounting.
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