Airtac SCT80~100 Multi-Position Tandem Cylinder SCT80X5X50S
The AirTAC Airtac SCT80~100 Multi-Position Tandem Cylinder SCT80X5X50S is a genuine double-acting MULTI-POSITION (tandem) air cylinder: two piston sections of 5mm and 50mm give 4 controllable stop positions across a 55mm total travel, with a Ø80mm bore, PT3/8 ports and adjustable end cushioning.
- BoreØ80 mm
- Stroke 15 mm
- Stroke 250 mm
- Total travel55 mm
- Positions4 stops
- Port sizePT3/8
About the Airtac SCT80~100 Multi-Position Tandem Cylinder SCT80X5X50S
The SCT80X5X50S is a double-acting multi-position tandem cylinder that provides four fixed rod positions: 0 mm (fully retracted), 5 mm, 50 mm, and the combined 55 mm total travel. This is achieved by independently pressurising two piston sections on a common rod line, making it ideal for applications needing a short precision step and a longer secondary stroke. Each section generates 2513 N of push force at 0.5 MPa, and the 25 mm diameter rod resists bending under axial loads.
This model includes a built-in magnet, allowing direct mounting of CMSG, DMSG, or EMSG sensors on the tie-rod barrel for non-contact position sensing. The 80 mm bore body has a length of 296 mm and uses PT3/8 ports. With an operating pressure up to 1.0 MPa, the per-section thrust reaches 4523 N, and the adjustable air cushion at each end decelerates the load smoothly across the 30-800 mm/s speed range.
Airtac SCT80~100 Multi-Position Tandem Cylinder SCT80X5X50S Technical Specifications
| Model | Airtac SCT80~100 Multi-Position Tandem Cylinder SCT80X5X50S |
|---|---|
| Series | SCT multi-position tie-rod cylinder |
| Bore size | Ø80 mm |
| Stroke 1 / Stroke 2 | 5 / 50 mm |
| Total travel | 55 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) | 5 mm |
| P2 (section 2) | 50 mm |
| P3 (both extended) | 55 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 SCT80X5X50S
| SCT | Multi-position (tandem) tie-rod cylinder series. |
|---|---|
| 80 | Bore size in mm (SCT range 32–100). |
| ×5 | Stroke 1 (section 1) in mm. |
| ×50 | 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 SCT80X5X50S Is Used
Two-Depth Precision Pressing
Use the 5 mm stroke for a light pre-press or part location, then actuate the 50 mm stroke for the full-depth insertion or forming operation, ensuring consistent depth control at both stages.
Dual-Position Gate or Diverter
Control a material flow gate with a closed position (0 mm), a partial-open metering gap (5 mm), and a full-open position (50 mm) for high-volume discharge, all from one compact cylinder.
Two-Stage Part Staging
In an automated assembly line, extend 5 mm to separate a single component from a stack, then extend the full 55 mm to transfer it to the next station, simplifying the pneumatic circuit.
Is the Airtac SCT80~100 Multi-Position Tandem Cylinder SCT80X5X50S the Right Cylinder?
Select the SCT80X5X50S when your process requires two distinct, repeatable extension lengths without the complexity of two separate cylinders and external hard stops. The 5 mm stroke provides a precise short-feed increment, while the 50 mm stroke handles the main transfer. If higher force is needed, stepping up to the 100 mm bore delivers 3927 N per section at 0.5 MPa. For a direct replacement, match the 80 mm bore, both 5 mm and 50 mm strokes, PT port thread, basic mounting, and the -S magnet option.
Given the very short 5 mm stroke on the first section, ensure the load is guided to prevent any side-loading that could cause uneven rod or bearing wear. For the 50 mm stroke section, a rigid external guide is recommended if the load is offset or unconstrained.
Multi-position checklist
- ✓ Need 4 repeatable stops?
- ✓ Section strokes 5 + 50 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 SCT80X5X50S FAQ
This tandem cylinder provides four discrete mechanical stops: 0 mm (home), 5 mm (first section extended), 50 mm (second section extended), and 55 mm (both sections extended). The positions are fixed by the two stroke lengths and are not infinitely adjustable.
The SCT integrates both strokes into a single, compact tie-rod body, eliminating the need for external brackets, alignment, and dual mounting. It ensures the two strokes are perfectly coaxial, reducing footprint and potential misalignment. A replacement must match the 80 mm bore, both the 5 mm and 50 mm strokes, PT ports, and the -S magnet option.
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