Airtac SCT80~100 Multi-Position Tandem Cylinder SCT80X50X80S
The AirTAC Airtac SCT80~100 Multi-Position Tandem Cylinder SCT80X50X80S is a genuine double-acting MULTI-POSITION (tandem) air cylinder: two piston sections of 50mm and 80mm give 4 controllable stop positions across a 130mm total travel, with a Ø80mm bore, PT3/8 ports and adjustable end cushioning.
- BoreØ80 mm
- Stroke 150 mm
- Stroke 280 mm
- Total travel130 mm
- Positions4 stops
- Port sizePT3/8
About the Airtac SCT80~100 Multi-Position Tandem Cylinder SCT80X50X80S
The SCT80X50X80S is a double-acting multi-position cylinder that provides four fixed rod positions: fully retracted (0 mm), 50 mm, 80 mm, and the combined total travel of 130 mm. By pressurising either or both of its two piston sections, you get repeatable mechanical stops without complex servo controls. Each section delivers 2513 N of push force at 0.5 MPa, rising to 4523 N at 0.9 MPa, driven through a 25 mm diameter rod.
This model includes a built-in magnet, allowing CMSG, DMSG, or EMSG sensors to clamp directly onto the tie-rod barrel for end-of-stroke or mid-position sensing. The 80 mm bore body has a length of 296 mm and uses PT3/8 ports. It operates on standard filtered air from 0.15 to 1.0 MPa. The adjustable air cushion at each end helps manage kinetic energy, but it is not a load-holding device—if position must be maintained without live pressure, an external rod lock is required.
Airtac SCT80~100 Multi-Position Tandem Cylinder SCT80X50X80S Technical Specifications
| Model | Airtac SCT80~100 Multi-Position Tandem Cylinder SCT80X50X80S |
|---|---|
| Series | SCT multi-position tie-rod cylinder |
| Bore size | Ø80 mm |
| Stroke 1 / Stroke 2 | 50 / 80 mm |
| Total travel | 130 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) | 50 mm |
| P2 (section 2) | 80 mm |
| P3 (both extended) | 130 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 SCT80X50X80S
| SCT | Multi-position (tandem) tie-rod cylinder series. |
|---|---|
| 80 | Bore size in mm (SCT range 32–100). |
| ×50 | 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 SCT80X50X80S Is Used
Four-Position Diverter Gate
Use the four discrete stops (0, 50, 80, 130 mm) to guide packages or parts onto three separate conveyor lanes from a single infeed point, with a fully retracted home position for maintenance access.
Two-Depth Pressing or Staking
Achieve two distinct pressing depths in one cycle by stopping the rod at 50 mm for a pre-form operation and then extending to 80 mm for the final form, all with the 2513 N force per section at 0.5 MPa.
Multi-Stop Part Transfer
Transfer a workpiece between four stations on an assembly line. The 130 mm total stroke moves the part from station 1 to 4, while the intermediate 50 mm and 80 mm positions allow precise stops at stations 2 and 3 for adhesive dispensing or inspection.
Is the Airtac SCT80~100 Multi-Position Tandem Cylinder SCT80X50X80S the Right Cylinder?
Choose the SCT tandem cylinder when your application needs three or four fixed, repeatable stop positions from a single pneumatic unit, saving the cost and complexity of mounting two separate cylinders with external hard stops. For the 80 mm bore, each section provides 2513 N of push force at 0.5 MPa. If your load requires a different force class, stepping down to a 63 mm bore yields 1559 N per section, while moving up to a 100 mm bore provides 3927 N per section at the same pressure. This SCT80X50X80S model is a direct replacement only for an identical AirTAC SCT with an 80 mm bore, 50 mm and 80 mm strokes, PT3/8 ports, basic mounting, and the -S magnet option.
Multi-position checklist
- ✓ Need 4 repeatable stops?
- ✓ Section strokes 50 + 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 SCT80X50X80S FAQ
This tandem cylinder has four discrete rod positions: 0 mm (fully retracted), 50 mm (first section extended), 80 mm (second section extended), and 130 mm (both sections extended, total travel). The stops are fixed by the mechanical stroke of each section and are not infinitely adjustable.
Yes, in many cases. A single SCT80X50X80S with four fixed positions can replace a setup using two individual cylinders and external hard stops, simplifying mounting, reducing air plumbing, and ensuring repeatable positioning. It is a direct replacement only for another AirTAC SCT with an 80 mm bore, 50 mm and 80 mm strokes, PT ports, basic mounting, and a built-in magnet.
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