Airtac SCT80~100 Multi-Position Tandem Cylinder SCT80X120X80
The AirTAC Airtac SCT80~100 Multi-Position Tandem Cylinder SCT80X120X80 is a genuine double-acting MULTI-POSITION (tandem) air cylinder: two piston sections of 120mm and 80mm give 4 controllable stop positions across a 200mm total travel, with a Ø80mm bore, PT3/8 ports and adjustable end cushioning.
- BoreØ80 mm
- Stroke 1120 mm
- Stroke 280 mm
- Total travel200 mm
- Positions4 stops
- Port sizePT3/8
About the Airtac SCT80~100 Multi-Position Tandem Cylinder SCT80X120X80
The SCT80X120X80 is a tandem multi-position pneumatic cylinder that delivers four distinct, repeatable rod positions without external hard stops. By pressurising its two 80 mm bore sections independently or together, the rod locates at 0 mm (fully retracted), 80 mm, 120 mm, or the full combined travel of 200 mm. Each actuated section generates a push force of 2513 N at 0.5 MPa, rising to 4523 N at the maximum operating pressure of 0.9 MPa.
This tie-rod cylinder uses a 25 mm diameter piston rod with an M20x1.5 male thread and PT3/8 ports. Its adjustable pneumatic cushioning absorbs end-of-stroke impact over a 28 mm length, promoting smooth deceleration. The body length A(SCT) is 296 mm, and the standard TPU seals suit ambient temperatures from -20 to +70 °C.
Airtac SCT80~100 Multi-Position Tandem Cylinder SCT80X120X80 Technical Specifications
| Model | Airtac SCT80~100 Multi-Position Tandem Cylinder SCT80X120X80 |
|---|---|
| Series | SCT multi-position tie-rod cylinder |
| Bore size | Ø80 mm |
| Stroke 1 / Stroke 2 | 120 / 80 mm |
| Total travel | 200 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) | 80 mm |
| P3 (both extended) | 200 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 SCT80X120X80
| SCT | Multi-position (tandem) tie-rod cylinder series. |
|---|---|
| 80 | Bore size in mm (SCT range 32–100). |
| ×120 | Stroke 1 (section 1) in mm. |
| ×80 | 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 SCT80X120X80 Is Used
Two-Station Diverter Gate
Actuate a packaging line diverter to three product lanes. Retract to 0 mm for lane one, extend to 80 mm for lane two, 120 mm for lane three, or fully extend to 200 mm for a reject chute.
Multi-Depth Pressing
Control a forming press to two different depths in one cycle. Use the 80 mm stop for a shallow pre-form and the 120 mm stop for a deeper final form, with 0 mm as the load/unload position.
Sequential Clamping Fixture
Operate a two-part clamping sequence on a CNC fixture. The first 80 mm stroke engages a low-profile clamp, and the subsequent 120 mm stroke locks a taller component, all from a single air supply circuit.
Is the Airtac SCT80~100 Multi-Position Tandem Cylinder SCT80X120X80 the Right Cylinder?
Choose the SCT80X120X80 when a single actuator must index a load to four fixed positions, eliminating the complexity and sequencing logic of two separate cylinders or an SC unit with external mechanical stops. If the 2513 N per-section push force at 0.5 MPa is more than required, stepping down to a 63 mm bore reduces the per-section force to 1559 N, while still offering the same four-position logic. For a direct replacement, match the 80 mm bore, both 120 mm and 80 mm strokes, PT3/8 ports, and basic mounting. If a section stroke exceeds 300 mm, consider external guide rods to protect the 25 mm rod from side-load deflection, though the 120 mm and 80 mm strokes here are well within standard cantilever limits.
Multi-position checklist
- ✓ Need 4 repeatable stops?
- ✓ Section strokes 120 + 80 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 SCT80X120X80 FAQ
This cylinder provides four discrete mechanical stops: 0 mm (fully retracted), 80 mm (first section extended), 120 mm (second section extended), and 200 mm (both sections extended, total travel). The positions are fixed by the two internal piston strokes and are not infinitely adjustable.
The force is generated per actuated piston section, not cumulatively. Each 80 mm bore section delivers 2513 N push and 2268 N pull at 0.5 MPa. When moving between the 0, 80, 120, and 200 mm stops, the driving force equals the output of one active section.
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