Airtac SCT80~100 Multi-Position Tandem Cylinder SCT80X20X5S
The AirTAC Airtac SCT80~100 Multi-Position Tandem Cylinder SCT80X20X5S is a genuine double-acting MULTI-POSITION (tandem) air cylinder: two piston sections of 20mm and 5mm give 4 controllable stop positions across a 25mm total travel, with a Ø80mm bore, PT3/8 ports and adjustable end cushioning.
- BoreØ80 mm
- Stroke 120 mm
- Stroke 25 mm
- Total travel25 mm
- Positions4 stops
- Port sizePT3/8
About the Airtac SCT80~100 Multi-Position Tandem Cylinder SCT80X20X5S
The SCT80X20X5S is a double-acting multi-position cylinder that delivers four fixed rod positions from two short strokes on a single axis: 0 mm (fully retracted), 20 mm, 5 mm, and the combined 25 mm total travel. Each piston section provides 2513 N of push force at 0.5 MPa, driven by a 25 mm diameter rod and cushioned by a 28 mm adjustable air cushion for smooth end-of-stroke deceleration.
This specific model includes a built-in magnet (-S suffix), allowing CMSG, DMSG, or EMSG solid-state sensors to clamp directly onto the tie-rod barrel for non-contact position sensing at each stop. The body length A(SCT) is 296 mm, and the standard PT3/8 ports keep pneumatic connections simple. It is a genuine AirTAC tandem unit, ideal for compact stations needing rapid, short-throw multi-stop actuation.
Airtac SCT80~100 Multi-Position Tandem Cylinder SCT80X20X5S Technical Specifications
| Model | Airtac SCT80~100 Multi-Position Tandem Cylinder SCT80X20X5S |
|---|---|
| Series | SCT multi-position tie-rod cylinder |
| Bore size | Ø80 mm |
| Stroke 1 / Stroke 2 | 20 / 5 mm |
| Total travel | 25 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) | 20 mm |
| P2 (section 2) | 5 mm |
| P3 (both extended) | 25 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 SCT80X20X5S
| SCT | Multi-position (tandem) tie-rod cylinder series. |
|---|---|
| 80 | Bore size in mm (SCT range 32–100). |
| ×20 | Stroke 1 (section 1) in mm. |
| ×5 | 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 SCT80X20X5S Is Used
Two-Level Part Ejection
Uses the 5 mm and 20 mm stops to push rejected parts into two different chutes based on a quality signal, keeping good parts on the main conveyor.
Multi-Depth Press-Fit Insertion
Drives a tool to two controlled insertion depths (5 mm and 20 mm) for installing components into a housing, with the 25 mm position used for a full retract clearing move.
Compact Diverter Gate Actuation
Positions a small diverter gate at 0°, 5°, and 20° angles to sort lightweight packages onto three lanes, with sensor confirmation at each stop via the built-in magnet.
Is the Airtac SCT80~100 Multi-Position Tandem Cylinder SCT80X20X5S the Right Cylinder?
Choose the SCT80X20X5S when your process needs four distinct, repeatable stop positions in a very compact stroke envelope—this model eliminates the complexity of two separate cylinders and external hard stops. If the 2513 N push force per section at 0.5 MPa is insufficient, stepping up to the SCT100 bore provides 3927 N per section; for a smaller footprint, the SCT63 bore offers 1559 N. The short strokes (20 mm and 5 mm) mean rod bending is not a concern here, so no external guide is needed for on-axis loads. To replace this unit, match the 80 mm bore, both strokes (20 mm and 5 mm), the PT3/8 port thread, the basic mounting configuration, and the integrated magnet (-S).
Multi-position checklist
- ✓ Need 4 repeatable stops?
- ✓ Section strokes 20 + 5 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 SCT80X20X5S FAQ
This tandem cylinder provides four discrete mechanical stops: 0 mm (home/retracted), 20 mm (section 1 extended), 5 mm (section 2 extended), and 25 mm (both sections extended). The positions are fixed by the two stroke lengths and are not infinitely adjustable.
Yes. The -S suffix on SCT80X20X5S indicates a built-in magnet band. You can mount CMSG (reed) or DMSG/EMSG (solid-state) sensors directly on the tie-rod barrel to detect piston position at any of the four stops.
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