Airtac SCT80~100 Multi-Position Tandem Cylinder SCT80X120X300
The AirTAC Airtac SCT80~100 Multi-Position Tandem Cylinder SCT80X120X300 is a genuine double-acting MULTI-POSITION (tandem) air cylinder: two piston sections of 120mm and 300mm give 4 controllable stop positions across a 420mm total travel, with a Ø80mm bore, PT3/8 ports and adjustable end cushioning.
- BoreØ80 mm
- Stroke 1120 mm
- Stroke 2300 mm
- Total travel420 mm
- Positions4 stops
- Port sizePT3/8
About the Airtac SCT80~100 Multi-Position Tandem Cylinder SCT80X120X300
The SCT80X120X300 tandem cylinder provides four fixed rod positions at 0, 120, 300, and 420 mm, giving designers a compact way to handle three distinct extend-and-retract tasks without multiple actuators. Each 80 mm bore piston section delivers 2513 N of push force at 0.5 MPa, rising to 4523 N at the maximum operating pressure of 0.9 MPa, while the 25 mm diameter rod and 28 mm air cushion at each end absorb energy for reliable cycle rates.
This tie-rod cylinder uses PT3/8 ports and comes with a body length A(SCT) of 296 mm in its basic configuration. The standard TPU seals suit ambient temperatures from -20 to +70 °C, and the adjustable pneumatic cushioning lets you fine-tune end-of-stroke deceleration. With a total travel of 420 mm, the unit is well-suited for multi-stop feeding or sorting stations where a single rod must reach two distinct extended positions under load.
Airtac SCT80~100 Multi-Position Tandem Cylinder SCT80X120X300 Technical Specifications
| Model | Airtac SCT80~100 Multi-Position Tandem Cylinder SCT80X120X300 |
|---|---|
| Series | SCT multi-position tie-rod cylinder |
| Bore size | Ø80 mm |
| Stroke 1 / Stroke 2 | 120 / 300 mm |
| Total travel | 420 mm |
| Stop positions | 4 positions |
| Acting type | Double acting (tandem, multi-position) |
| Port size | PT3/8 |
| Rod thread | M20×1.5 |
| 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) | 120 mm |
| P2 (section 2) | 300 mm |
| P3 (both extended) | 420 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 (Ø80mm)
| Pressure | Push force | Pull force |
|---|---|---|
| 0.5 MPa | 2513 N | 2268 N |
| 0.7 MPa | 3519 N | — |
| Max (@1.0 MPa) | 513 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 SCT80~100 Multi-Position Tandem Cylinder SCT80X120X300
| SCT | Multi-position (tandem) tie-rod cylinder series. |
|---|---|
| 80 | Bore size in mm (SCT range 32–100). |
| ×120 | Stroke 1 (section 1) in mm. |
| ×300 | 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 SCT80~100 Multi-Position Tandem Cylinder SCT80X120X300 Is Used
Two-Stop Diverter Gate
Use the 120 mm and 300 mm stops to route packages to two separate conveyor lanes from a single feed point, cycling between retracted, mid, and full extension.
Multi-Depth Pressing
Achieve two distinct pressing depths in a single cycle—a light pre-press at 120 mm and a full forming stroke at 300 mm—without resetting tooling.
Sequential Part Transfer
Pick a component at the retracted position, advance it 120 mm to an inspection station, then move it the full 300 mm to a downstream fixture.
Is the Airtac SCT80~100 Multi-Position Tandem Cylinder SCT80X120X300 the Right Cylinder?
Select the SCT80X120X300 when your process needs two separate extended stops (120 mm and 300 mm) plus a fully retracted and a fully extended position, all from one pneumatic circuit. This approach eliminates the cost and complexity of mounting two individual cylinders with external hard stops. If your thrust requirement is lower, stepping down to the 63 mm bore reduces per-section push force to 1559 N at 0.5 MPa, while moving up to the 100 mm bore increases it to 3927 N.
For replacement, match an AirTAC SCT with an 80 mm bore, 120 mm first stroke, 300 mm second stroke, PT3/8 ports, and the same basic mounting style. Because the 300 mm second stroke creates a long extended assembly, assess the application for side-loading and consider an external guide or rod support to prevent bending under offset loads.
Multi-position checklist
- ✓ Need 4 repeatable stops?
- ✓ Section strokes 120 + 300 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 SCT80~100 Multi-Position Tandem Cylinder SCT80X120X300 FAQ
It provides four discrete mechanical stops: fully retracted (0 mm), first section extended (120 mm), second section extended (300 mm), and both sections extended for full travel (420 mm). These are fixed by the cylinder's two internal stroke lengths.
Yes, if your application requires stops at 120 mm and 300 mm from a single rod line. The SCT tandem design integrates both strokes into one body, reducing mounting hardware and simplifying the pneumatic circuit. Ensure the per-section force of 2513 N at 0.5 MPa meets your load requirements at each stop.
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