Airtac SCT80~100 Multi-Position Tandem Cylinder SCT80X40X25S
The AirTAC Airtac SCT80~100 Multi-Position Tandem Cylinder SCT80X40X25S is a genuine double-acting MULTI-POSITION (tandem) air cylinder: two piston sections of 40mm and 25mm give 4 controllable stop positions across a 65mm total travel, with a Ø80mm bore, PT3/8 ports and adjustable end cushioning.
- BoreØ80 mm
- Stroke 140 mm
- Stroke 225 mm
- Total travel65 mm
- Positions4 stops
- Port sizePT3/8
About the Airtac SCT80~100 Multi-Position Tandem Cylinder SCT80X40X25S
The SCT80X40X25S delivers four fixed rod positions (0, 40, 25, and 65 mm total travel) by combining two piston sections on a single 25 mm diameter rod line. Each section generates a push force of 2513 N at 0.5 MPa, rising to 4523 N at the maximum 0.9 MPa operating pressure, making it suitable for sorting or diverting tasks where pneumatic logic selects the stop.
This model includes a built-in magnet, allowing CMSG, DMSG, or EMSG sensors to clamp directly onto the tie-rod barrel for reliable end-of-stroke or mid-position sensing. The body length A(SCT) is 296 mm and the adjustable air cushion (28 mm) at each end section helps manage kinetic energy during high-speed cycles up to 800 mm/s.
Airtac SCT80~100 Multi-Position Tandem Cylinder SCT80X40X25S Technical Specifications
| Model | Airtac SCT80~100 Multi-Position Tandem Cylinder SCT80X40X25S |
|---|---|
| Series | SCT multi-position tie-rod cylinder |
| Bore size | Ø80 mm |
| Stroke 1 / Stroke 2 | 40 / 25 mm |
| Total travel | 65 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) | 40 mm |
| P2 (section 2) | 25 mm |
| P3 (both extended) | 65 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 SCT80X40X25S
| SCT | Multi-position (tandem) tie-rod cylinder series. |
|---|---|
| 80 | Bore size in mm (SCT range 32–100). |
| ×40 | Stroke 1 (section 1) in mm. |
| ×25 | 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 SCT80X40X25S Is Used
Two-Stage Diverter Gate
Uses the 25 mm and 40 mm strokes to route packages to three separate conveyor lanes by pressurizing section one, section two, or both in sequence.
Multi-Depth Insertion
Pushes components to two different insertion depths (25 mm and 40 mm) in an assembly fixture, with magnetic sensors confirming each partial-advance position.
Staggered Part Ejection
Ejects parts at two different offset distances from a die or mold, using the 65 mm total stroke for full clearance and the intermediate stops for selective placement.
Is the Airtac SCT80~100 Multi-Position Tandem Cylinder SCT80X40X25S the Right Cylinder?
Choose this 4-position configuration when your process requires two distinct intermediate stops in addition to fully retracted and fully extended. The unequal strokes (40 mm and 25 mm) provide asymmetric positioning that is difficult to achieve with a pair of standard cylinders and external hard stops. If higher force is needed, stepping up to the SCT100 series provides 3927 N of push per section at 0.5 MPa.
For direct replacement, match the 80 mm bore, both 40 mm and 25 mm section strokes, PT port thread, and the integrated magnet (-S suffix). The basic mounting style accepts the full SCT accessory range—FA/FB flanges, CA/CB devises, or LB feet—which can be ordered separately if the mounting scheme changes.
Multi-position checklist
- ✓ Need 4 repeatable stops?
- ✓ Section strokes 40 + 25 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 SCT80X40X25S FAQ
This tandem cylinder provides 4 discrete mechanical stops: 0 mm (fully retracted), 40 mm (section one extended), 25 mm (section two extended), and 65 mm (both sections extended for total travel).
Not directly. The SCT80X40X25S is a multi-position cylinder with two separate air inlets and a total length built for tandem sections. It replaces another SCT80 with the same 40 mm and 25 mm stroke combination, matching port thread (PT) and the magnet option.
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