Airtac SCT80~100 Multi-Position Tandem Cylinder SCT80X50X450S
The AirTAC Airtac SCT80~100 Multi-Position Tandem Cylinder SCT80X50X450S is a genuine double-acting MULTI-POSITION (tandem) air cylinder: two piston sections of 50mm and 450mm give 4 controllable stop positions across a 500mm total travel, with a Ø80mm bore, PT3/8 ports and adjustable end cushioning.
- BoreØ80 mm
- Stroke 150 mm
- Stroke 2450 mm
- Total travel500 mm
- Positions4 stops
- Port sizePT3/8
About the Airtac SCT80~100 Multi-Position Tandem Cylinder SCT80X50X450S
The SCT80X50X450S is an 80 mm bore tandem multi-position cylinder that delivers four fixed rod positions: 0 mm (fully retracted), 50 mm, 450 mm, and 500 mm (total travel). Each piston section generates 2513 N of push force at 0.5 MPa, rising to 4523 N at the maximum operating pressure of 0.9 MPa, making it suitable for sequenced clamping or multi-depth pressing operations.
This model includes a built-in magnet (-S suffix), allowing direct mounting of CMSG, DMSG, or EMSG sensors on the tie-rod barrel for non-contact position feedback. The 25 mm diameter rod and 28 mm adjustable air cushion at each end help manage end-of-stroke impact, while the 296 mm body length provides a compact envelope for its 500 mm total stroke.
Airtac SCT80~100 Multi-Position Tandem Cylinder SCT80X50X450S Technical Specifications
| Model | Airtac SCT80~100 Multi-Position Tandem Cylinder SCT80X50X450S |
|---|---|
| Series | SCT multi-position tie-rod cylinder |
| Bore size | Ø80 mm |
| Stroke 1 / Stroke 2 | 50 / 450 mm |
| Total travel | 500 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) | 450 mm |
| P3 (both extended) | 500 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 SCT80X50X450S
| SCT | Multi-position (tandem) tie-rod cylinder series. |
|---|---|
| 80 | Bore size in mm (SCT range 32–100). |
| ×50 | Stroke 1 (section 1) in mm. |
| ×450 | 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 SCT80X50X450S Is Used
Two-Depth Part Insertion
Uses the 50 mm and 450 mm stops to insert components to two distinct depths in a single cycle, such as pressing a bearing to a preliminary then final seat.
Multi-Stop Diverter Gate
Positions a diverter gate at 0 mm (closed), 50 mm (partial bypass), 450 mm (main flow), or 500 mm (full open) to route materials on a conveyor line.
Sequential Clamping Station
Applies a light clamp at the 50 mm position for alignment, then a full-power clamp at the 500 mm total travel position, using sensor confirmation at each step.
Is the Airtac SCT80~100 Multi-Position Tandem Cylinder SCT80X50X450S the Right Cylinder?
Choose the SCT80X50X450S when your application requires four discrete stopping points without the complexity of servo controls. This tandem cylinder is more cost-effective and compact than using two separate 80 mm bore cylinders with external stops to achieve the same 50 mm and 450 mm intermediate positions. If a higher force is needed, consider stepping up to the SCT100 bore, which provides 3927 N of push per section at 0.5 MPa.
For replacement, match an AirTAC SCT with an 80 mm bore, both 50 mm and 450 mm section strokes, PT port thread, basic mounting, and the -S magnet option. Because the second stroke is 450 mm, ensure the rod is adequately guided or supported if significant side loads are present to prevent bending during full extension.
Multi-position checklist
- ✓ Need 4 repeatable stops?
- ✓ Section strokes 50 + 450 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 SCT80X50X450S FAQ
This tandem cylinder provides four discrete rod positions: 0 mm (retracted), 50 mm (first section extended), 450 mm (second section extended), and 500 mm (both sections extended). The positions are fixed by the two stroke lengths and are selected by pressurizing the appropriate cylinder sections.
No, an SCT cylinder does not mechanically lock at any position. If air pressure is lost or a directional valve is centered, the piston can drift or drop under load. To hold a load at an intermediate stop without live pressure, you must add an external rod brake, a mechanical lock, or pilot-operated check valves in the circuit.
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