Airtac SCT80~100 Multi-Position Tandem Cylinder SCT80X80X250S
The AirTAC Airtac SCT80~100 Multi-Position Tandem Cylinder SCT80X80X250S is a genuine double-acting MULTI-POSITION (tandem) air cylinder: two piston sections of 80mm and 250mm give 4 controllable stop positions across a 330mm total travel, with a Ø80mm bore, PT3/8 ports and adjustable end cushioning.
- BoreØ80 mm
- Stroke 180 mm
- Stroke 2250 mm
- Total travel330 mm
- Positions4 stops
- Port sizePT3/8
About the Airtac SCT80~100 Multi-Position Tandem Cylinder SCT80X80X250S
The SCT80X80X250S is a double-acting multi-position tandem cylinder that delivers four fixed rod positions from a single unit: 0 mm, 80 mm, 250 mm, and the combined total travel of 330 mm. By pressurizing the two piston sections independently, you gain three distinct extended stops without the complexity of external hard stops or multiple actuators. Each section generates a push force of 2513 N at 0.5 MPa, scaling to 4523 N at the maximum operating pressure of 0.9 MPa.
This model includes a built-in magnet, allowing CMSG, DMSG, or EMSG sensors to be clamped directly onto the tie-rod barrel for reliable end-of-stroke or mid-position sensing. The 80 mm bore uses a 25 mm diameter piston rod with PT3/8 ports and an M20x1.5 rod thread. Variable end cushioning, adjustable via two needle valves, decelerates the load smoothly across all four stop positions, while the 28 mm cushion length helps manage the inertia of heavier payloads during the 330 mm total travel.
Airtac SCT80~100 Multi-Position Tandem Cylinder SCT80X80X250S Technical Specifications
| Model | Airtac SCT80~100 Multi-Position Tandem Cylinder SCT80X80X250S |
|---|---|
| Series | SCT multi-position tie-rod cylinder |
| Bore size | Ø80 mm |
| Stroke 1 / Stroke 2 | 80 / 250 mm |
| Total travel | 330 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) | 80 mm |
| P2 (section 2) | 250 mm |
| P3 (both extended) | 330 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 SCT80X80X250S
| SCT | Multi-position (tandem) tie-rod cylinder series. |
|---|---|
| 80 | Bore size in mm (SCT range 32–100). |
| ×80 | Stroke 1 (section 1) in mm. |
| ×250 | 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 SCT80X80X250S Is Used
Two-Stage Diverter Gate
Use the 80 mm and 250 mm stops to route packages to two separate conveyor lanes, with the 330 mm position providing a third bypass path, all from one compact cylinder.
Multi-Depth Clamping Fixture
Clamp a workpiece at a low-force 80 mm standoff for tacking, then drive to the 250 mm position for full-pressure welding, and retract completely to 0 mm for part removal.
Sequential Part Feeding
Advance a pusher plate to 80 mm to separate a single blank from a stack, then extend to 250 mm to transfer it into a die, using the 330 mm total travel for ejection.
Is the Airtac SCT80~100 Multi-Position Tandem Cylinder SCT80X80X250S the Right Cylinder?
Choose the SCT80X80X250S when your application requires three distinct extended positions without the alignment and plumbing overhead of two separate cylinders. The 80 mm and 250 mm strokes create an asymmetric position set ideal for a two-step feed followed by a full retract. If your force requirement is lower, stepping down to a 63 mm bore reduces the per-section push force to 1559 N at 0.5 MPa, which may be sufficient for lighter sorting tasks. For a direct replacement, match the 80 mm bore, both the 80 mm and 250 mm section strokes, the PT port thread, and the integrated magnet (-S suffix). Note that with a 250 mm stroke on the second section, ensure the rod is adequately guided if significant side loads are present during mid-position extension to prevent rod bending or premature seal wear.
Multi-position checklist
- ✓ Need 4 repeatable stops?
- ✓ Section strokes 80 + 250 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 SCT80X80X250S FAQ
This tandem cylinder provides four discrete rod positions: fully retracted (0 mm), first section extended (80 mm), second section extended (250 mm), and both sections extended for the total travel (330 mm). The stops are fixed by the cylinder's internal mechanics, not infinitely variable.
Yes, in many cases. The SCT80X80X250S integrates two strokes into one rod line, saving space and simplifying plumbing. For a drop-in replacement, ensure the replacement unit matches the 80 mm bore, the 80 mm and 250 mm strokes, the PT3/8 port thread, and the -S magnet option for sensor compatibility.
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