Airtac SCT80~100 Multi-Position Tandem Cylinder SCT100X40X40S
The AirTAC Airtac SCT80~100 Multi-Position Tandem Cylinder SCT100X40X40S 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 Ø100mm bore, PT1/2 ports and adjustable end cushioning.
- BoreØ100 mm
- Stroke 140 mm
- Stroke 240 mm
- Total travel80 mm
- Positions3 stops
- Port sizePT1/2
About the Airtac SCT80~100 Multi-Position Tandem Cylinder SCT100X40X40S
The SCT100X40X40S is a double-acting, multi-position tie-rod cylinder that delivers three fixed rod positions: 0 mm (fully retracted), 40 mm, and 80 mm total travel. Each of its two piston sections generates 3927 N of push force at 0.5 MPa, scaling up to 7068 N at the maximum operating pressure of 0.9 MPa, making it suitable for heavy-duty sorting or diverting tasks.
This model features a built-in magnet, allowing direct mounting of CMSG, DMSG, or EMSG sensors along the barrel for reliable end-of-stroke or mid-position detection. It uses a 25 mm diameter rod, PT1/2 ports, and an M20x1.5 rod thread, with a 29 mm adjustable air cushion in each section to decelerate the 513 kgf theoretical max load smoothly.
Airtac SCT80~100 Multi-Position Tandem Cylinder SCT100X40X40S Technical Specifications
| Model | Airtac SCT80~100 Multi-Position Tandem Cylinder SCT100X40X40S |
|---|---|
| Series | SCT multi-position tie-rod cylinder |
| Bore size | Ø100 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 | PT1/2 |
| 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, 29 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 (Ø100mm)
| Pressure | Push force | Pull force |
|---|---|---|
| 0.5 MPa | 3927 N | 3682 N |
| 0.7 MPa | 5498 N | — |
| Max (@1.0 MPa) | 801 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 SCT100X40X40S
| SCT | Multi-position (tandem) tie-rod cylinder series. |
|---|---|
| 100 | 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 SCT100X40X40S Is Used
3-Position Diverter Gate
Controls a flap or gate to three distinct angles for routing packages on a conveyor line. The 0, 40, and 80 mm rod positions correspond to left, center, and right divert paths.
Multi-Stop Pallet Stopper
Provides a raised, lowered, and an intermediate hold position for pallets in a gravity flow rack. The 3927 N push force per section securely lifts and stages heavy loads at each discrete stop.
Two-Depth Pressing Station
Actuates a platen to two different pressing depths in a single cycle. The 40 mm stroke per section sets a partial-engage and a full-engage position, with sensor confirmation via the built-in magnet.
Is the Airtac SCT80~100 Multi-Position Tandem Cylinder SCT100X40X40S the Right Cylinder?
Choose the SCT100X40X40S when a single actuator must provide three distinct mechanical stops without the complexity of two separate cylinders and external hard stops. For applications needing a lighter force class, stepping down to the 80 mm bore provides 2513 N of push per section at 0.5 MPa, while maintaining the same 40 mm stroke increments. This cylinder is a direct replacement for an existing AirTAC SCT100X40X40S with a magnet and PT threads; verify that both section strokes, the 100 mm bore, and the sensor mounting requirement match exactly.
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 SCT100X40X40S FAQ
It provides 3 distinct mechanical stop positions because both stroke sections are equal at 40 mm. The rod can be positioned at 0 mm (fully retracted), 40 mm, and the total extended length of 80 mm.
No. Like all standard pneumatic cylinders, the SCT100X40X40S will drift or drop if air pressure is exhausted or lost. To hold a load at the 40 mm position without live pressure, you must add an external rod lock or a pilot-operated check valve.
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