Airtac SCT80~100 Multi-Position Tandem Cylinder SCT80X25X30S
The AirTAC Airtac SCT80~100 Multi-Position Tandem Cylinder SCT80X25X30S is a genuine double-acting MULTI-POSITION (tandem) air cylinder: two piston sections of 25mm and 30mm give 4 controllable stop positions across a 55mm total travel, with a Ø80mm bore, PT3/8 ports and adjustable end cushioning.
- BoreØ80 mm
- Stroke 125 mm
- Stroke 230 mm
- Total travel55 mm
- Positions4 stops
- Port sizePT3/8
About the Airtac SCT80~100 Multi-Position Tandem Cylinder SCT80X25X30S
The SCT80X25X30S tandem cylinder provides four distinct working positions—0, 25, 30, and 55 mm—by combining two piston sections on a common 25 mm diameter rod. Each section generates a push force of 2513 N at 0.5 MPa, making it suitable for compact sorting or diverting stations that need more than a standard 3-position stop pattern.
A built-in magnet allows CMSG, DMSG, or EMSG sensors to clamp directly onto the tie-rod barrel for non-contact position sensing at every stop. The 80 mm bore body has an A-length of 296 mm and uses PT3/8 ports, with an adjustable air cushion of 28 mm at each end to manage end-of-stroke impact across the 30–800 mm/s speed range.
Airtac SCT80~100 Multi-Position Tandem Cylinder SCT80X25X30S Technical Specifications
| Model | Airtac SCT80~100 Multi-Position Tandem Cylinder SCT80X25X30S |
|---|---|
| Series | SCT multi-position tie-rod cylinder |
| Bore size | Ø80 mm |
| Stroke 1 / Stroke 2 | 25 / 30 mm |
| Total travel | 55 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) | 25 mm |
| P2 (section 2) | 30 mm |
| P3 (both extended) | 55 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 SCT80X25X30S
| SCT | Multi-position (tandem) tie-rod cylinder series. |
|---|---|
| 80 | Bore size in mm (SCT range 32–100). |
| ×25 | Stroke 1 (section 1) in mm. |
| ×30 | 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 SCT80X25X30S Is Used
Two-Stage Diverter Gate
Uses the 25 mm and 30 mm strokes to shift a chute or gate into four distinct lanes, directing product flow without needing two separate actuators.
Multi-Depth Label Press
Positions a tamp pad at 0, 25, 30, or 55 mm to apply labels onto packages of varying heights on a mixed-product conveyor line.
Staggered Part Ejection
Controls an ejector blade to four precise positions for sorting machined components by height into different collection bins.
Is the Airtac SCT80~100 Multi-Position Tandem Cylinder SCT80X25X30S the Right Cylinder?
Choose this 4-position model when your sequence requires two unequal short strokes that a single cylinder with external stops cannot reliably repeat. If you need higher force per section, step up to the 100 mm bore (3927 N push at 0.5 MPa); for a lighter, more compact actuator, the 63 mm bore delivers 1559 N. This specific SCT80X25X30S is a direct replacement for any SCT80 with 25 mm and 30 mm strokes, PT thread, and the -S magnet option.
Multi-position checklist
- ✓ Need 4 repeatable stops?
- ✓ Section strokes 25 + 30 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 SCT80X25X30S FAQ
It provides four discrete mechanical stops: 0 mm (fully retracted), 25 mm (section one extended), 30 mm (section two extended), and 55 mm (both sections extended, total travel).
Yes, in applications where you need four fixed positions along a single linear path. It replaces two SC80 cylinders and their mounting hardware with one tandem unit, simplifying the air circuit. Ensure the replacement matches the 25 mm and 30 mm strokes, PT3/8 ports, and the -S magnet option.
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