Airtac SCT80~100 Multi-Position Tandem Cylinder SCT80X250X80S
The AirTAC Airtac SCT80~100 Multi-Position Tandem Cylinder SCT80X250X80S is a genuine double-acting MULTI-POSITION (tandem) air cylinder: two piston sections of 250mm and 80mm give 4 controllable stop positions across a 330mm total travel, with a Ø80mm bore, PT3/8 ports and adjustable end cushioning.
- BoreØ80 mm
- Stroke 1250 mm
- Stroke 280 mm
- Total travel330 mm
- Positions4 stops
- Port sizePT3/8
About the Airtac SCT80~100 Multi-Position Tandem Cylinder SCT80X250X80S
The SCT80X250X80S is a tie-rod multi-position cylinder that provides four fixed rod positions: fully retracted (0 mm), 80 mm, 250 mm, and the combined total travel of 330 mm. Each of the two tandem piston sections delivers a push force of 2513 N at 0.5 MPa, scaling up to 4523 N at the maximum operating pressure of 0.9 MPa, making it a robust actuator for sequenced, multi-stop linear moves.
This model includes a built-in magnet (-S suffix), allowing easy external mounting of CMSG, DMSG, or EMSG sensors directly onto the 80 mm bore barrel. The 25 mm diameter piston rod and PT3/8 ports ensure solid mechanical connection and standard pneumatic flow. With a 28 mm adjustable air cushion on each section, the cylinder decelerates the load smoothly at every stop position without requiring external shock absorbers.
Airtac SCT80~100 Multi-Position Tandem Cylinder SCT80X250X80S Technical Specifications
| Model | Airtac SCT80~100 Multi-Position Tandem Cylinder SCT80X250X80S |
|---|---|
| Series | SCT multi-position tie-rod cylinder |
| Bore size | Ø80 mm |
| Stroke 1 / Stroke 2 | 250 / 80 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) | 250 mm |
| P2 (section 2) | 80 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 SCT80X250X80S
| SCT | Multi-position (tandem) tie-rod cylinder series. |
|---|---|
| 80 | Bore size in mm (SCT range 32–100). |
| ×250 | Stroke 1 (section 1) in mm. |
| ×80 | 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 SCT80X250X80S Is Used
Four-Position Diverter Gate
Controls a flap or gate on a conveyor line to four distinct angles. The 0, 80, 250, and 330 mm stops route packages to four separate lanes without needing multiple actuators or complex servo controls.
Multi-Depth Clamping Station
Applies two different clamping pressures at two different part heights. The cylinder advances to 80 mm for a low-force pre-clamp on one product variant, then extends to 250 mm for a high-force main clamp on a taller assembly.
Sequential Part Transfer
Shifts a workpiece through a four-step process, such as a pick-and-place unit. The sensor-confirmed stops at 0, 80, 250, and 330 mm guarantee the part is accurately presented at each station for drilling, pressing, and ejection.
Is the Airtac SCT80~100 Multi-Position Tandem Cylinder SCT80X250X80S the Right Cylinder?
Select the SCT80X250X80S when your process requires a single actuator to stop reliably at four distinct positions, eliminating the cost and complexity of two separate cylinders with external hard stops. If the 2513 N push force per section at 0.5 MPa is insufficient, stepping up to the SCT100 series provides a per-section push force of 3927 N at the same pressure. For a lighter load, the SCT63 bore offers 1559 N.
When replacing an existing unit, match the 80 mm bore, both the 250 mm and 80 mm stroke sections, the PT3/8 port thread, and the integrated magnet (-S). Note that the 250 mm section stroke is substantial; for horizontal applications, ensure the load is externally guided to prevent rod bending and side-load wear on the bearing and seals.
Multi-position checklist
- ✓ Need 4 repeatable stops?
- ✓ Section strokes 250 + 80 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 SCT80X250X80S FAQ
This tandem cylinder provides four discrete mechanical stops: 0 mm (fully retracted), 80 mm (stroke 2 section extended), 250 mm (stroke 1 section extended), and 330 mm (both sections extended for total travel). The built-in magnet allows sensors to verify each position.
The force is generated per single actuated piston section. Each section of the SCT80 provides a push force of 2513 N at 0.5 MPa and a pull force of 2268 N. The cylinder does not combine the force of the two sections; it uses them independently to reach different stroke lengths.
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