Airtac SCT80~100 Multi-Position Tandem Cylinder SCT80X60X20S
The AirTAC Airtac SCT80~100 Multi-Position Tandem Cylinder SCT80X60X20S is a genuine double-acting MULTI-POSITION (tandem) air cylinder: two piston sections of 60mm and 20mm give 4 controllable stop positions across a 80mm total travel, with a Ø80mm bore, PT3/8 ports and adjustable end cushioning.
- BoreØ80 mm
- Stroke 160 mm
- Stroke 220 mm
- Total travel80 mm
- Positions4 stops
- Port sizePT3/8
About the Airtac SCT80~100 Multi-Position Tandem Cylinder SCT80X60X20S
The SCT80X60X20S is a tandem multi-position pneumatic cylinder that delivers four discrete rod stops: 0 mm (fully retracted), 60 mm, 20 mm, and the full 80 mm total travel. By pressurising either of the two piston sections independently or both together, you can reliably index between these fixed positions without external mechanical stops. Each section provides a push force of 2513 N at 0.5 MPa, rising to 4523 N at the maximum operating pressure of 0.9 MPa.
This model includes a built-in magnet (-S suffix), allowing standard CMSG, DMSG, or EMSG sensors to be clamped directly onto the 80 mm bore tie-rod barrel for non-contact position sensing. The 25 mm diameter piston rod and PT3/8 ports handle high flow, while the 28 mm adjustable air cushion at each end section decelerates the load smoothly. The body length A(SCT) is 296 mm, providing a compact footprint for its multi-stop capability.
Airtac SCT80~100 Multi-Position Tandem Cylinder SCT80X60X20S Technical Specifications
| Model | Airtac SCT80~100 Multi-Position Tandem Cylinder SCT80X60X20S |
|---|---|
| Series | SCT multi-position tie-rod cylinder |
| Bore size | Ø80 mm |
| Stroke 1 / Stroke 2 | 60 / 20 mm |
| Total travel | 80 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) | 60 mm |
| P2 (section 2) | 20 mm |
| P3 (both extended) | 80 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 SCT80X60X20S
| SCT | Multi-position (tandem) tie-rod cylinder series. |
|---|---|
| 80 | Bore size in mm (SCT range 32–100). |
| ×60 | Stroke 1 (section 1) in mm. |
| ×20 | 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 SCT80X60X20S Is Used
Two-Stage Part Diverting
Use the four positions (0, 20, 60, 80 mm) to guide parts to three different conveyor lanes. A short 20 mm stroke shifts to lane 2, a 60 mm stroke to lane 3, and full extension clears the gate.
Multi-Depth Press-Fit Insertion
Install bearings or bushings to two different depths in a single station. The 20 mm stroke sets the first depth, and the 60 mm stroke completes the full insertion, ensuring consistent, repeatable placement.
Sequential Clamping & Forming
Operate a two-step forming die where a 20 mm pre-clamp stroke holds the workpiece before a 60 mm forming stroke applies full pressure, all controlled by a single tandem cylinder with sensor feedback.
Is the Airtac SCT80~100 Multi-Position Tandem Cylinder SCT80X60X20S the Right Cylinder?
Select the SCT when your application requires two or three distinct, repeatable stop points along a single linear axis, eliminating the complexity and cost of two separate cylinders with external brackets. The 80 mm bore provides a robust 2513 N of push force per section at 0.5 MPa. If your load is lighter, stepping down to a 63 mm bore (1559 N push at 0.5 MPa) can reduce air consumption and physical size. For a heavier load, the 100 mm bore offers 3927 N per section.
For a direct replacement, match the 80 mm bore, the exact 60 mm and 20 mm section strokes, PT port thread, and the built-in magnet (-S). Since the 60 mm stroke section extends a significant distance, ensure the rod is adequately guided if side loads are present to prevent bending, especially when the rod is fully extended to the 80 mm total travel position.
Multi-position checklist
- ✓ Need 4 repeatable stops?
- ✓ Section strokes 60 + 20 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 SCT80X60X20S FAQ
It provides 4 discrete mechanical stop positions because the two strokes are different lengths. The rod can be positioned at 0 mm (fully retracted), 60 mm (first section extended), 20 mm (second section extended), and 80 mm (both sections extended for total travel).
Yes, if your sequence requires only the fixed stops at 20 mm and 60 mm. The SCT replaces two cylinders and their mounting hardware with a single, self-contained unit. Ensure the replacement matches the 80 mm bore, 60+20 mm strokes, PT ports, and the -S magnet option for sensor compatibility.
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