Airtac SCT80~100 Multi-Position Tandem Cylinder SCT80X40X80
The AirTAC Airtac SCT80~100 Multi-Position Tandem Cylinder SCT80X40X80 is a genuine double-acting MULTI-POSITION (tandem) air cylinder: two piston sections of 40mm and 80mm give 4 controllable stop positions across a 120mm total travel, with a Ø80mm bore, PT3/8 ports and adjustable end cushioning.
- BoreØ80 mm
- Stroke 140 mm
- Stroke 280 mm
- Total travel120 mm
- Positions4 stops
- Port sizePT3/8
About the Airtac SCT80~100 Multi-Position Tandem Cylinder SCT80X40X80
The SCT80X40X80 tandem cylinder provides four distinct rod positions—0 mm, 40 mm, 80 mm, and the full 120 mm total travel—by pressurising its two 80 mm bore sections independently or together. Each 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 a robust choice for multi-stop material handling.
Built on a durable tie-rod body with a 25 mm diameter rod and PT3/8 ports, this cylinder features a 28 mm adjustable air cushion in each section for smooth deceleration. The body length A(SCT) is 296 mm, providing a compact envelope for a four-position actuator with this force class.
Airtac SCT80~100 Multi-Position Tandem Cylinder SCT80X40X80 Technical Specifications
| Model | Airtac SCT80~100 Multi-Position Tandem Cylinder SCT80X40X80 |
|---|---|
| Series | SCT multi-position tie-rod cylinder |
| Bore size | Ø80 mm |
| Stroke 1 / Stroke 2 | 40 / 80 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) | 40 mm |
| P2 (section 2) | 80 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 SCT80X40X80
| SCT | Multi-position (tandem) tie-rod cylinder series. |
|---|---|
| 80 | Bore size in mm (SCT range 32–100). |
| ×40 | 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 SCT80X40X80 Is Used
Sorting Gate Actuation
Operates a three-way diverter gate with positions for home, divert-left (40 mm), and divert-right (120 mm), using the 80 mm intermediate stop for a secondary reject bin.
Two-Depth Clamping
Provides two distinct clamping pressures or depths in a single fixture—a partial clamp at 40 mm extension for delicate parts and a full-power clamp at 120 mm for robust workpieces.
Multi-Stop Pusher
Pushes cartons to three different conveyor lanes. The rod extends to 40 mm for lane one, 80 mm for lane two, and the full 120 mm stroke reaches the furthest lane.
Is the Airtac SCT80~100 Multi-Position Tandem Cylinder SCT80X40X80 the Right Cylinder?
Select the SCT80X40X80 when your application requires four fixed stop points without the complexity of servo controls or multiple single-stroke cylinders. If higher force is needed, consider stepping up to the 100 mm bore (SCT100 series), which provides 3927 N of push per section at 0.5 MPa. For a lighter load, the 63 mm bore offers 1559 N.
This model is a direct replacement for an existing AirTAC SCT80 cylinder with 40 mm and 80 mm strokes, PT ports, and basic mounting. For strokes of this length, ensure the rod is adequately guided if side loads are present to prevent bending and premature seal wear.
Multi-position checklist
- ✓ Need 4 repeatable stops?
- ✓ Section strokes 40 + 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 SCT80X40X80 FAQ
It provides four discrete positions: 0 mm (fully retracted), 40 mm (first section extended), 80 mm (second section extended), and 120 mm (both sections extended). The positions are fixed by the two stroke lengths and are not infinitely adjustable.
Each of the two 80 mm bore piston sections delivers 2513 N of push force and 2268 N of pull force when operated at 0.5 MPa. The force does not double when both sections are pressurised for the 120 mm position; each section contributes its rated force independently to the rod's movement.
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