Airtac SCT32-63 Multi-Position Tandem Air Cylinder SCT63X50X75S
The AirTAC Airtac SCT32-63 Multi-Position Tandem Air Cylinder SCT63X50X75S is a genuine double-acting MULTI-POSITION (tandem) air cylinder: two piston sections of 50mm and 75mm give 4 controllable stop positions across a 125mm total travel, with a Ø63mm bore, PT1/4 ports and adjustable end cushioning.
- BoreØ63 mm
- Stroke 150 mm
- Stroke 275 mm
- Total travel125 mm
- Positions4 stops
- Port sizePT1/4
About the Airtac SCT32-63 Multi-Position Tandem Air Cylinder SCT63X50X75S
The SCT63X50X75S is a tandem multi-position cylinder that delivers four fixed rod positions from two piston sections on a common rod line. With strokes of 50 mm and 75 mm, the reachable stops are 0 mm (fully retracted), 50 mm, 75 mm, and the combined total travel of 125 mm. Each 63 mm bore section generates 1559 N of push force at 0.5 MPa, rising to 2805 N at the maximum operating pressure of 0.9 MPa.
This model includes a built-in magnet (-S suffix), allowing direct mounting of CMSG, DMSG, or EMSG reed and solid-state sensors on the tie-rod barrel for position confirmation at any of the four stops. The cylinder uses a 20 mm diameter piston rod with an M16x1.5 male thread, PT1/4 ports, and an adjustable air cushion length of 28 mm at each end cap to manage end-of-stroke deceleration.
Airtac SCT32-63 Multi-Position Tandem Air Cylinder SCT63X50X75S Technical Specifications
| Model | Airtac SCT32-63 Multi-Position Tandem Air Cylinder SCT63X50X75S |
|---|---|
| Series | SCT multi-position tie-rod cylinder |
| Bore size | Ø63 mm |
| Stroke 1 / Stroke 2 | 50 / 75 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) | 50 mm |
| P2 (section 2) | 75 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 SCT63X50X75S
| SCT | Multi-position (tandem) tie-rod cylinder series. |
|---|---|
| 63 | Bore size in mm (SCT range 32–100). |
| ×50 | Stroke 1 (section 1) in mm. |
| ×75 | 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 SCT63X50X75S Is Used
Two-Stage Sorting Gate
Operate a diverter gate with four positions: home, partial divert for small items, partial divert for large items, and full bypass. The 50 mm and 75 mm strokes provide the distinct mechanical stops for each lane.
Multi-Depth Pressing
Control a press platen to two different insertion depths. The first 50 mm stroke provides a pre-press position, while the combined 125 mm travel delivers the final seating depth, all without adjusting hard stops.
Sequential Part Feeding
Advance a workpiece through a multi-station fixture. The cylinder moves to 50 mm for a drilling operation, retracts to 75 mm for a tapping station, and extends to 125 mm for part ejection.
Is the Airtac SCT32-63 Multi-Position Tandem Air Cylinder SCT63X50X75S the Right Cylinder?
Select the SCT63X50X75S when your application requires four distinct mechanical stop positions without the complexity of servo control or multiple separate actuators. This tandem unit is more compact and cost-effective than installing two individual SC63 cylinders with external hard stops to create a multi-step sequence. If your load requires slightly less force, consider stepping down to the 50 mm bore SCT series, which provides 982 N of push per section at 0.5 MPa.
For a direct replacement, match the 63 mm bore, both stroke lengths (50 mm and 75 mm), the PT port thread, and the built-in magnet feature. Since the longest section stroke here is 75 mm, rod buckling and side-load concerns are minimal; however, always guide the load externally if significant radial forces are present.
Multi-position checklist
- ✓ Need 4 repeatable stops?
- ✓ Section strokes 50 + 75 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 SCT63X50X75S FAQ
This tandem cylinder provides four discrete mechanical stops: 0 mm (fully retracted), 50 mm (first section extended), 75 mm (second section extended), and 125 mm (both sections extended for full travel). You select the position by pressurizing the appropriate combination of the two piston sections.
Yes, if you need fixed 50 mm and 75 mm strokes from a single rod. The SCT63X50X75S integrates both strokes into one tie-rod body, saving space and eliminating the need to synchronize two separate actuators. Ensure the port thread (PT), bore (63 mm), and magnet sensor option match your existing setup.
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