Airtac SCT80~100 Multi-Position Tandem Cylinder SCT80X20X10S
The AirTAC Airtac SCT80~100 Multi-Position Tandem Cylinder SCT80X20X10S is a genuine double-acting MULTI-POSITION (tandem) air cylinder: two piston sections of 20mm and 10mm give 4 controllable stop positions across a 30mm total travel, with a Ø80mm bore, PT3/8 ports and adjustable end cushioning.
- BoreØ80 mm
- Stroke 120 mm
- Stroke 210 mm
- Total travel30 mm
- Positions4 stops
- Port sizePT3/8
About the Airtac SCT80~100 Multi-Position Tandem Cylinder SCT80X20X10S
The SCT80X20X10S is a multi-position tandem cylinder that delivers four discrete rod stops from two independent piston sections. With strokes of 20 mm and 10 mm, the reachable positions are 0 mm (fully retracted), 10 mm, 20 mm, and the full 30 mm total travel. Each section provides 2513 N of push force at 0.5 MPa, giving predictable thrust for short-throw indexing tasks.
This model includes a built-in magnet, allowing CMSG, DMSG, or EMSG sensors to clamp directly onto the tie-rod barrel for reliable end-of-stroke or mid-position sensing. The 25 mm diameter rod and PT3/8 ports handle rapid cycling, while the 28 mm adjustable air cushion at each end protects the assembly. The body length A(SCT) is 296 mm, making it compact for an 80 mm bore tandem unit.
Airtac SCT80~100 Multi-Position Tandem Cylinder SCT80X20X10S Technical Specifications
| Model | Airtac SCT80~100 Multi-Position Tandem Cylinder SCT80X20X10S |
|---|---|
| Series | SCT multi-position tie-rod cylinder |
| Bore size | Ø80 mm |
| Stroke 1 / Stroke 2 | 20 / 10 mm |
| Total travel | 30 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) | 20 mm |
| P2 (section 2) | 10 mm |
| P3 (both extended) | 30 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 SCT80X20X10S
| SCT | Multi-position (tandem) tie-rod cylinder series. |
|---|---|
| 80 | Bore size in mm (SCT range 32–100). |
| ×20 | Stroke 1 (section 1) in mm. |
| ×10 | 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 SCT80X20X10S Is Used
Two-Depth Press Insertion
Use the 10 mm and 20 mm stops to insert components to two distinct depths in a single press cycle, eliminating the need for a secondary station.
Compact Part Diverting
The four positions (0, 10, 20, 30 mm) can align a diverter gate to four separate chutes, sorting small parts on a high-speed packaging line.
Multi-Stop Glue Dispensing
Position a dispensing nozzle at three different heights above a workpiece for applying beads at varying offsets, controlled by the cylinder's discrete stops.
Is the Airtac SCT80~100 Multi-Position Tandem Cylinder SCT80X20X10S the Right Cylinder?
Choose the SCT80X20X10S when a single cylinder must provide four fixed stopping points without the complexity of two separate actuators and external hard stops. The 80 mm bore suits medium-force applications; if your load requires less thrust, the 63 mm bore SCT offers 1559 N push per section at 0.5 MPa. For a direct replacement, match the 80 mm bore, both 20 mm and 10 mm strokes, PT thread, and the -S magnet option. Since both strokes are short, rod guiding is typically unnecessary unless the attached tooling imposes a significant side load.
Multi-position checklist
- ✓ Need 4 repeatable stops?
- ✓ Section strokes 20 + 10 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 SCT80X20X10S FAQ
It provides 4 distinct mechanical stops. The rod can be positioned at 0 mm (fully retracted), 10 mm (second section extended), 20 mm (first section extended), and 30 mm (both sections extended, total travel).
Yes, provided the replacement matches the 80 mm bore, 20 mm and 10 mm strokes, PT port thread, and the -S magnet. The SCT series accepts FA, FB, CA, CB, or LB mounting brackets, but the base cylinder must be identical.
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