Airtac SCT80~100 Multi-Position Tandem Cylinder SCT80X40X40S
The AirTAC Airtac SCT80~100 Multi-Position Tandem Cylinder SCT80X40X40S is a genuine double-acting MULTI-POSITION (tandem) air cylinder: two piston sections of 40mm and 40mm give 3 controllable stop positions across a 80mm total travel, with a Ø80mm bore, PT3/8 ports and adjustable end cushioning.
- BoreØ80 mm
- Stroke 140 mm
- Stroke 240 mm
- Total travel80 mm
- Positions3 stops
- Port sizePT3/8
About the Airtac SCT80~100 Multi-Position Tandem Cylinder SCT80X40X40S
The SCT80X40X40S is a double-acting multi-position tandem cylinder that provides three fixed rod positions: fully retracted (0 mm), 40 mm, and the total travel of 80 mm. Each 80 mm bore section generates a push force of 2513 N at 0.5 MPa, making it suitable for medium-duty sorting or diverting tasks where two distinct extended stops are required.
Equipped with a built-in magnet, this model accepts CMSG, DMSG, or EMSG sensors directly on the tie-rod barrel for non-contact position sensing. The cylinder uses a 25 mm diameter rod with PT3/8 ports, features a 28 mm adjustable air cushion at each end, and has a body length A of 296 mm.
Airtac SCT80~100 Multi-Position Tandem Cylinder SCT80X40X40S Technical Specifications
| Model | Airtac SCT80~100 Multi-Position Tandem Cylinder SCT80X40X40S |
|---|---|
| Series | SCT multi-position tie-rod cylinder |
| Bore size | Ø80 mm |
| Stroke 1 / Stroke 2 | 40 / 40 mm |
| Total travel | 80 mm |
| Stop positions | 3 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 (3)
| Position | Rod extension |
|---|---|
| P0 (retracted) | 0 mm |
| P1 (section 1) | 40 mm |
| P2 (both extended) | 80 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 SCT80X40X40S
| SCT | Multi-position (tandem) tie-rod cylinder series. |
|---|---|
| 80 | Bore size in mm (SCT range 32–100). |
| ×40 | 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 SCT80X40X40S Is Used
Two-Way Diverter Gate
Actuates a diverter chute to three fixed positions—home, mid-point, and full extension—for routing packages on a conveyor line.
Multi-Stop Clamping
Provides two distinct clamping pressures or depths for holding parts of varying thicknesses during an automated assembly sequence.
Staged Part Ejection
Pushes a finished component to an intermediate inspection station at 40 mm, then to the final ejection point at the full 80 mm stroke.
Is the Airtac SCT80~100 Multi-Position Tandem Cylinder SCT80X40X40S the Right Cylinder?
This 3-position SCT unit replaces the complexity of two separate cylinders with external stops, simplifying the pneumatic circuit and reducing alignment overhead. For applications needing higher force, consider stepping up to the SCT100 series, which provides 3927 N of push per section at 0.5 MPa. A direct replacement must match the 80 mm bore, both 40 mm strokes, PT port thread, and the S magnet option.
Multi-position checklist
- ✓ Need 3 repeatable stops?
- ✓ Section strokes 40 + 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 SCT80X40X40S FAQ
It has three discrete mechanical stops: 0 mm (fully retracted), 40 mm (first section extended), and 80 mm (both sections extended).
No, it cannot. Like all standard pneumatic cylinders, it will drift if pressure is exhausted. You must add an external rod brake or a pilot-operated check valve to safely hold a load without live pressure.
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Related AirTAC SCT Multi-Position Cylinders
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