Airtac SCT80~100 Multi-Position Tandem Cylinder SCT80X25X5S
The AirTAC Airtac SCT80~100 Multi-Position Tandem Cylinder SCT80X25X5S is a genuine double-acting MULTI-POSITION (tandem) air cylinder: two piston sections of 25mm and 5mm give 4 controllable stop positions across a 30mm total travel, with a Ø80mm bore, PT3/8 ports and adjustable end cushioning.
- BoreØ80 mm
- Stroke 125 mm
- Stroke 25 mm
- Total travel30 mm
- Positions4 stops
- Port sizePT3/8
About the Airtac SCT80~100 Multi-Position Tandem Cylinder SCT80X25X5S
The SCT80X25X5S is a tandem multi-position pneumatic cylinder that delivers four fixed rod positions from two independently controlled piston sections. With strokes of 25 mm and 5 mm, the reachable stops are 0 mm (fully retracted), 5 mm, 25 mm, and the combined total travel of 30 mm. This compact sequence is ideal for short-throw sorting or shuttling where a fine 5 mm differential step is required alongside a longer 25 mm transfer.
Each 80 mm bore section generates a push force of 2513 N at 0.5 MPa and up to 4523 N at the maximum operating pressure of 0.9 MPa, moving a 25 mm diameter rod. The body length A is 296 mm, and the cylinder features a built-in magnet (denoted by the -S suffix), allowing direct mounting of CMSG/DMSG/EMSG sensors for end-of-stroke or mid-position confirmation without extra brackets.
Airtac SCT80~100 Multi-Position Tandem Cylinder SCT80X25X5S Technical Specifications
| Model | Airtac SCT80~100 Multi-Position Tandem Cylinder SCT80X25X5S |
|---|---|
| Series | SCT multi-position tie-rod cylinder |
| Bore size | Ø80 mm |
| Stroke 1 / Stroke 2 | 25 / 5 mm |
| Total travel | 30 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) | 5 mm |
| P3 (both extended) | 30 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 SCT80X25X5S
| SCT | Multi-position (tandem) tie-rod cylinder series. |
|---|---|
| 80 | Bore size in mm (SCT range 32–100). |
| ×25 | 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 SCT80X25X5S Is Used
Two-Lane Diverter Gate
The 25 mm and 5 mm strokes create a four-position gate for diverting small parts into two lanes, using the 5 mm offset for a fine alignment correction before the main 25 mm shift.
Sequential Part Ejection
Pneumatically sequence a two-step ejector: a 5 mm pre-eject to break stiction, followed by a 25 mm full-eject stroke, with sensors confirming each discrete position.
Short-Stroke Stamping Feed
Advance a stamping feed mechanism in a precise 5 mm increment for thin-gauge material, then use the 25 mm stroke for a rapid return or a secondary coarse-feed step.
Is the Airtac SCT80~100 Multi-Position Tandem Cylinder SCT80X25X5S the Right Cylinder?
This four-position unit replaces setups that would otherwise require two separate cylinders and a mounting plate, simplifying the bill of materials and saving space. When specifying a replacement, match the 80 mm bore, both the 25 mm and 5 mm section strokes, the PT port thread, and the integrated magnet. If the 80 mm bore provides more force than needed, stepping down to a 63 mm bore reduces the per-section push force to 1559 N at 0.5 MPa while maintaining the same multi-position logic.
Multi-position checklist
- ✓ Need 4 repeatable stops?
- ✓ Section strokes 25 + 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 SCT80X25X5S FAQ
This cylinder provides four discrete mechanical stops: 0 mm (home), 5 mm (section 2 extended), 25 mm (section 1 extended), and 30 mm (both sections extended). The positions are fixed by the two stroke lengths and are not infinitely adjustable.
No. Like all standard pneumatic cylinders, the SCT80X25X5S will drift or drop if pressure is exhausted. The air cushion and multi-position stops do not act as a mechanical lock. If the load must be held at a mid-position without live pressure, an external rod brake or pilot-operated check valve is required.
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