Airtac SCT80~100 Multi-Position Tandem Cylinder SCT80X100X25
The AirTAC Airtac SCT80~100 Multi-Position Tandem Cylinder SCT80X100X25 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 SCT80X100X25
The SCT80X100X25 tandem cylinder provides four fixed rod positions—0 mm, 25 mm, 100 mm, and the full 125 mm total travel—by pressurising its two piston sections independently or together. Each 80 mm bore section generates 2513 N of push force at 0.5 MPa, rising to 4523 N at 0.9 MPa, driven through a rigid 25 mm diameter rod.
This double-acting multi-position actuator uses a tie-rod construction with a 28 mm adjustable air cushion in each section and PT3/8 ports. The body length A(SCT) is 296 mm, making it a compact alternative to two separate cylinders for sequenced two-depth or diverter tasks.
Airtac SCT80~100 Multi-Position Tandem Cylinder SCT80X100X25 Technical Specifications
| Model | Airtac SCT80~100 Multi-Position Tandem Cylinder SCT80X100X25 |
|---|---|
| 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 SCT80X100X25
| 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 SCT80X100X25 Is Used
Two-Way Diverter Gate
Uses the 25 mm and 125 mm positions to route packages or parts down two separate conveyor lanes from a single infeed point.
Two-Depth Pressing or Staking
The 100 mm and 125 mm stops provide a coarse and fine pressing depth for assembly operations requiring a pre-compression and final set step.
Sequenced Part Ejection
Retracts to 0 mm for loading, extends to 25 mm for a first-stage clamp, then to 100 mm for full part ejection after machining.
Is the Airtac SCT80~100 Multi-Position Tandem Cylinder SCT80X100X25 the Right Cylinder?
Choose the SCT80X100X25 when your process needs a 125 mm total stroke split into two distinct intermediate stops at 25 mm and 100 mm. This model eliminates the complexity of aligning two individual cylinders and external hard stops. If your force requirement is lower, stepping down to the 63 mm bore reduces per-section push to 1559 N at 0.5 MPa, saving air consumption.
For replacement, match the 80 mm bore, both strokes (100 mm and 25 mm), PT3/8 port thread, and basic mounting. If your application requires position sensing, order the magnet-equipped variant SCT80X100X25-S. With a combined stroke of 125 mm, rod deflection is minimal, but for higher side loads consider an external guide rail.
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 SCT80X100X25 FAQ
This tandem cylinder has four discrete positions: fully retracted (0 mm), first section extended (25 mm), second section extended (100 mm), and both sections extended for the total travel of 125 mm. The stops are fixed by the two stroke lengths and are not infinitely adjustable.
The SCT integrates both strokes on a single common rod, guaranteeing coaxial alignment and reducing mounting hardware. Two separate cylinders would require a coupling bracket and careful alignment to achieve the same three working positions without binding, and would consume more space than the single SCT body.
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