Airtac SCT80~100 Multi-Position Tandem Cylinder SCT80X100X25S
The AirTAC Airtac SCT80~100 Multi-Position Tandem Cylinder SCT80X100X25S is a genuine double-acting MULTI-POSITION (tandem) air cylinder: two piston sections of 100mm and 25mm give 4 controllable stop positions across a 125mm total travel, with a Ø80mm bore, PT3/8 ports and adjustable end cushioning.
- BoreØ80 mm
- Stroke 1100 mm
- Stroke 225 mm
- Total travel125 mm
- Positions4 stops
- Port sizePT3/8
About the Airtac SCT80~100 Multi-Position Tandem Cylinder SCT80X100X25S
The SCT80X100X25S is a double-acting multi-position tandem cylinder that provides four fixed rod positions by combining two piston sections with strokes of 100 mm and 25 mm. The reachable stops are 0 mm (fully retracted), 25 mm, 100 mm, and the total travel of 125 mm, selected by pressurizing either section individually or both together. Each actuated section delivers a push force of 2513 N at 0.5 MPa, rising to 4523 N at the maximum operating pressure of 0.9 MPa.
This model features a built-in magnet (-S suffix), allowing direct mounting of CMSG, DMSG, or EMSG reed and solid-state sensors along the tie-rod barrel for reliable end-of-stroke or intermediate position detection. The 80 mm bore cylinder uses a 25 mm diameter piston rod with PT3/8 ports and M20x1.5 rod thread, and includes adjustable pneumatic cushioning with a 28 mm cushion length to decelerate the load smoothly at each stroke end.
Airtac SCT80~100 Multi-Position Tandem Cylinder SCT80X100X25S Technical Specifications
| Model | Airtac SCT80~100 Multi-Position Tandem Cylinder SCT80X100X25S |
|---|---|
| Series | SCT multi-position tie-rod cylinder |
| Bore size | Ø80 mm |
| Stroke 1 / Stroke 2 | 100 / 25 mm |
| Total travel | 125 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) | 100 mm |
| P2 (section 2) | 25 mm |
| P3 (both extended) | 125 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 SCT80X100X25S
| SCT | Multi-position (tandem) tie-rod cylinder series. |
|---|---|
| 80 | Bore size in mm (SCT range 32–100). |
| ×100 | 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 SCT80X100X25S Is Used
Two-Depth Pressing
Achieve a partial insertion depth at 25 mm for pre-alignment, then advance to the full 100 mm stroke for final pressing, with the combined 125 mm position available for ejection or clearance moves.
3-Way Diverter Gate
Use the 0 mm, 25 mm, and 100 mm positions to route product flow to three distinct lanes or chutes on a packaging line, with the 125 mm position serving as a maintenance bypass.
Multi-Stop Part Feeding
Index a workpiece carrier to a 25 mm staging point for inspection, then to the 100 mm position for machining, using the built-in magnet sensors to confirm each discrete stop before cycle continuation.
Is the Airtac SCT80~100 Multi-Position Tandem Cylinder SCT80X100X25S the Right Cylinder?
Select the SCT80X100X25S when your application requires four discrete mechanical stops without the complexity of servo controls or multiple individual cylinders. The asymmetric stroke combination (100 mm + 25 mm) is ideal for processes needing a long primary advance and a short secondary positioning step, such as a two-depth pressing operation or a diverter gate with a partial-open bypass position. If a higher force per section is needed, consider stepping up to the 100 mm bore SCT100 series, which provides 3927 N of push force at 0.5 MPa.
For drop-in replacement, match the 80 mm bore, both strokes (100 mm and 25 mm), PT port thread, and the -S magnet option. The basic mounting configuration allows direct integration using the standard tie-rod end nuts, but FA, FB, CA, CB, or LB mounting accessories can be added if the mounting style changes. Note that with the 100 mm stroke section extended, ensure the rod is adequately guided if significant side loads are present to prevent bending of the 25 mm rod.
Multi-position checklist
- ✓ Need 4 repeatable stops?
- ✓ Section strokes 100 + 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 SCT80X100X25S FAQ
This tandem cylinder provides four discrete mechanical stops: 0 mm (fully retracted), 25 mm (section 2 extended), 100 mm (section 1 extended), and 125 mm (both sections extended). The positions are fixed by the two stroke lengths and are not infinitely adjustable.
The SCT integrates both strokes onto a single common piston rod and tie-rod body, which reduces overall length, eliminates alignment issues between two separate cylinders, and simplifies pneumatic plumbing to just three port connections. It also guarantees the positional relationship between the two strokes is mechanically fixed, whereas two independent cylinders can drift out of sequence without external hard stops.
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