Airtac SCT32-63 Multi-Position Tandem Air Cylinder SCT63X125X175
The AirTAC Airtac SCT32-63 Multi-Position Tandem Air Cylinder SCT63X125X175 is a genuine double-acting MULTI-POSITION (tandem) air cylinder: two piston sections of 125mm and 175mm give 4 controllable stop positions across a 300mm total travel, with a Ø63mm bore, PT1/4 ports and adjustable end cushioning.
- BoreØ63 mm
- Stroke 1125 mm
- Stroke 2175 mm
- Total travel300 mm
- Positions4 stops
- Port sizePT1/4
About the Airtac SCT32-63 Multi-Position Tandem Air Cylinder SCT63X125X175
The SCT63X125X175 is a double-acting tandem cylinder that delivers four fixed rod positions from two independent piston sections on a common 20 mm rod. With strokes of 125 mm and 175 mm, the reachable stops are 0 mm (fully retracted), 125 mm, 175 mm, and the total travel of 300 mm. Each 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 63 mm bore tie-rod cylinder uses PT1/4 ports and features a 28 mm adjustable air cushion at each end to decelerate the load smoothly. The body length A(SCT) is 249 mm plus the combined stroke length. It operates on filtered air from 0.15 to 1.0 MPa across a standard temperature range of -20 to +70 °C with its TPU seals.
Airtac SCT32-63 Multi-Position Tandem Air Cylinder SCT63X125X175 Technical Specifications
| Model | Airtac SCT32-63 Multi-Position Tandem Air Cylinder SCT63X125X175 |
|---|---|
| Series | SCT multi-position tie-rod cylinder |
| Bore size | Ø63 mm |
| Stroke 1 / Stroke 2 | 125 / 175 mm |
| Total travel | 300 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) | 175 mm |
| P3 (both extended) | 300 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 SCT63X125X175
| SCT | Multi-position (tandem) tie-rod cylinder series. |
|---|---|
| 63 | Bore size in mm (SCT range 32–100). |
| ×125 | Stroke 1 (section 1) in mm. |
| ×175 | 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 SCT63X125X175 Is Used
Three-Way Part Sorting
Use the four discrete stop positions to direct parts to three separate conveyor lanes. Retract to lane 1, extend to 125 mm for lane 2, 175 mm for lane 3, or fully extend to 300 mm for a reject chute.
Two-Depth Pressing Station
Program a press with two distinct insertion depths. The 125 mm stroke performs a shallow pre-press, while the 175 mm stroke completes the full-depth seat, with the 300 mm total travel used for part ejection.
Multi-Stop Glue Dispensing
Position a dispensing head at three precise heights over a pallet. The 125 mm and 175 mm stops align with different component tiers, and the fully retracted 0 mm position clears the pallet for indexing.
Is the Airtac SCT32-63 Multi-Position Tandem Air Cylinder SCT63X125X175 the Right Cylinder?
Choose the SCT63X125X175 when your process needs a single actuator to index between four distinct mechanical stops, eliminating the complexity and plumbing of two separate cylinders with external hard stops. If your load requires higher force, stepping up to the 80 mm bore SCT80 series provides 2513 N of push per section at 0.5 MPa. For a lighter, more compact solution, the 50 mm bore SCT50 delivers 982 N.
A direct replacement must match the 63 mm bore, both the 125 mm and 175 mm section strokes, PT port threads, and basic mounting. Since the longer 175 mm section stroke approaches mid-range extension, ensure the guided load is aligned to prevent side-loading and rod bending, especially when the rod is near full extension.
Multi-position checklist
- ✓ Need 4 repeatable stops?
- ✓ Section strokes 125 + 175 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 SCT63X125X175 FAQ
This tandem cylinder provides four discrete mechanical stops: 0 mm (fully retracted), 125 mm (section 1 extended), 175 mm (section 2 extended), and 300 mm (both sections extended). The positions are fixed by the two stroke lengths and are not infinitely variable.
The force per actuated piston section is identical to a single SC63 cylinder—1559 N push at 0.5 MPa. The SCT does not combine force from both sections; it simply provides the thrust of one 63 mm bore at multiple discrete stroke positions from a single, compact actuator body.
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