Airtac SCT80~100 Multi-Position Tandem Cylinder SCT80X280X120
The AirTAC Airtac SCT80~100 Multi-Position Tandem Cylinder SCT80X280X120 is a genuine double-acting MULTI-POSITION (tandem) air cylinder: two piston sections of 280mm and 120mm give 4 controllable stop positions across a 400mm total travel, with a Ø80mm bore, PT3/8 ports and adjustable end cushioning.
- BoreØ80 mm
- Stroke 1280 mm
- Stroke 2120 mm
- Total travel400 mm
- Positions4 stops
- Port sizePT3/8
About the Airtac SCT80~100 Multi-Position Tandem Cylinder SCT80X280X120
The SCT80X280X120 is an 80 mm bore multi-position tandem cylinder that delivers four distinct, repeatable rod positions without external stops: 0 mm (fully retracted), 120 mm, 280 mm, and the full 400 mm total travel. Each piston section generates 2513 N of push force at 0.5 MPa, rising to 4523 N at the maximum operating pressure of 0.9 MPa, making it suitable for diverting heavy packages or indexing large fixtures.
Built on a durable tie-rod construction with a 25 mm diameter piston rod and PT3/8 ports, this cylinder includes a 28 mm adjustable air cushion in each section for controlled end-of-stroke deceleration. The body length A(SCT) is 296 mm, providing a compact tandem envelope for its combined stroke capability. Standard TPU seals ensure reliable operation in ambient temperatures from -20 to +70 °C.
Airtac SCT80~100 Multi-Position Tandem Cylinder SCT80X280X120 Technical Specifications
| Model | Airtac SCT80~100 Multi-Position Tandem Cylinder SCT80X280X120 |
|---|---|
| Series | SCT multi-position tie-rod cylinder |
| Bore size | Ø80 mm |
| Stroke 1 / Stroke 2 | 280 / 120 mm |
| Total travel | 400 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) | 280 mm |
| P2 (section 2) | 120 mm |
| P3 (both extended) | 400 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 SCT80X280X120
| SCT | Multi-position (tandem) tie-rod cylinder series. |
|---|---|
| 80 | Bore size in mm (SCT range 32–100). |
| ×280 | Stroke 1 (section 1) in mm. |
| ×120 | 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 SCT80X280X120 Is Used
Multi-Lane Diverter
Positions a diverter gate at four distinct angles to route packages from a single infeed conveyor to three separate outfeed lanes plus a neutral bypass position.
Two-Depth Pressing
Executes a two-stage pressing operation: a rapid 280 mm approach stroke, a controlled 120 mm press depth, and a full 400 mm retract for part clearance.
Staggered Part Feeding
Advances components in a staggered pattern on an assembly line, using the 120 mm and 280 mm stops to create variable spacing between parts for different process stations.
Is the Airtac SCT80~100 Multi-Position Tandem Cylinder SCT80X280X120 the Right Cylinder?
Choose the SCT80X280X120 when your application requires four fixed mechanical stops without the complexity and alignment drift of two separate cylinders and external hard stops. The 280 mm and 120 mm strokes create an asymmetric position set ideal for a two-step feed followed by a shorter final placement. If your load demands more thrust, stepping up to the 100 mm bore provides 3927 N of push per section at 0.5 MPa.
For replacement, match the 80 mm bore, both the 280 mm and 120 mm strokes, PT port thread, and basic mounting configuration. Since the 280 mm section stroke is substantial, ensure the guided load is aligned to prevent side-loading and rod bending; consider an external guide rail if the rod is directly coupled to an offset mass.
Multi-position checklist
- ✓ Need 4 repeatable stops?
- ✓ Section strokes 280 + 120 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 SCT80X280X120 FAQ
This tandem cylinder provides four discrete mechanical stops: 0 mm (fully retracted), 120 mm (section 2 extended), 280 mm (section 1 extended), and 400 mm (both sections extended, total travel). The positions are fixed by the two stroke lengths and are selected by pressurizing the appropriate cylinder sections.
The SCT integrates two piston sections on a single common rod, guaranteeing fixed, repeatable intermediate positions without the need to align and synchronize two independent cylinders and external hard stops. It saves installation space and eliminates the risk of mechanical drift between separate actuators, though the force output per section is identical to a single SC80 cylinder.
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