Airtac SCT80~100 Multi-Position Tandem Cylinder SCT80X80X40
The AirTAC Airtac SCT80~100 Multi-Position Tandem Cylinder SCT80X80X40 is a genuine double-acting MULTI-POSITION (tandem) air cylinder: two piston sections of 80mm and 40mm give 4 controllable stop positions across a 120mm total travel, with a Ø80mm bore, PT3/8 ports and adjustable end cushioning.
- BoreØ80 mm
- Stroke 180 mm
- Stroke 240 mm
- Total travel120 mm
- Positions4 stops
- Port sizePT3/8
About the Airtac SCT80~100 Multi-Position Tandem Cylinder SCT80X80X40
The SCT80X80X40 is an 80 mm bore tandem cylinder delivering four fixed rod positions: fully retracted (0 mm), 80 mm, 40 mm, and the total travel of 120 mm. This position set is achieved by pressurising the two piston sections independently or together, making it a compact alternative to complex multi-actuator setups for sequenced movements.
Each 80 mm bore section generates 2513 N of push force at 0.5 MPa, rising to 4523 N at the maximum operating pressure of 0.9 MPa. The unit features a 25 mm diameter piston rod, PT3/8 ports, and a 28 mm adjustable air cushion at each end. The tie-rod body has an A(SCT) length of 296 mm.
Airtac SCT80~100 Multi-Position Tandem Cylinder SCT80X80X40 Technical Specifications
| Model | Airtac SCT80~100 Multi-Position Tandem Cylinder SCT80X80X40 |
|---|---|
| Series | SCT multi-position tie-rod cylinder |
| Bore size | Ø80 mm |
| Stroke 1 / Stroke 2 | 80 / 40 mm |
| Total travel | 120 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) | 80 mm |
| P2 (section 2) | 40 mm |
| P3 (both extended) | 120 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 SCT80X80X40
| SCT | Multi-position (tandem) tie-rod cylinder series. |
|---|---|
| 80 | Bore size in mm (SCT range 32–100). |
| ×80 | Stroke 1 (section 1) in mm. |
| ×40 | 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 SCT80X80X40 Is Used
Two-Stage Sorting Gate
Uses the 40 mm and 80 mm stops to divert packages to three separate conveyor lanes from a single infeed point, simplifying gate control logic.
Multi-Depth Pressing
Provides two distinct pressing depths (40 mm and 80 mm) plus a full 120 mm retract for part loading, ideal for a two-step forming or insertion process.
Sequential Clamping Fixture
Applies a light 40 mm clamp for positioning, followed by a full 80 mm stroke for high-force locking, all from one compact tandem cylinder body.
Is the Airtac SCT80~100 Multi-Position Tandem Cylinder SCT80X80X40 the Right Cylinder?
Select the SCT80X80X40 when your application requires four distinct mechanical stop positions without the cost and plumbing of two separate cylinders and external hard stops. The 80 mm bore provides a robust force class suitable for medium-duty automation. If your load requires less force, stepping down to a 63 mm bore (1559 N push at 0.5 MPa per section) can reduce air consumption and footprint.
For direct replacement, match the 80 mm bore, both strokes (80 mm and 40 mm), PT port thread, and basic mounting configuration precisely. When a section stroke exceeds 300 mm, evaluate the rod for potential side-loading and consider adding an external guide or rod support to prevent bending.
Multi-position checklist
- ✓ Need 4 repeatable stops?
- ✓ Section strokes 80 + 40 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 SCT80X80X40 FAQ
This model provides four discrete mechanical stops: 0 mm (fully retracted), 80 mm (section 1 extended), 40 mm (section 2 extended), and 120 mm (both sections extended, total travel).
The SCT uses two pistons on a common rod, so the force output is per-section, not additive for positioning. Each 80 mm section provides 2513 N of push force at 0.5 MPa. It replaces the function of two cylinders for multi-stop positioning, not for doubling the force on a single load.
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