Airtac SCT80~100 Multi-Position Tandem Cylinder SCT80X50X30S
The AirTAC Airtac SCT80~100 Multi-Position Tandem Cylinder SCT80X50X30S is a genuine double-acting MULTI-POSITION (tandem) air cylinder: two piston sections of 50mm and 30mm give 4 controllable stop positions across a 80mm total travel, with a Ø80mm bore, PT3/8 ports and adjustable end cushioning.
- BoreØ80 mm
- Stroke 150 mm
- Stroke 230 mm
- Total travel80 mm
- Positions4 stops
- Port sizePT3/8
About the Airtac SCT80~100 Multi-Position Tandem Cylinder SCT80X50X30S
The SCT80X50X30S is a double-acting multi-position tandem cylinder that delivers four fixed rod positions: fully retracted (0 mm), 30 mm, 50 mm, and fully extended at 80 mm total travel. Each 80 mm bore section generates 2513 N of push force at 0.5 MPa, rising to 4523 N at the maximum operating pressure of 0.9 MPa, driven through a 25 mm diameter piston rod.
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 sensing. The cylinder body has an A(SCT) length of 296 mm with 28 mm of adjustable air cushion at each end, providing reliable deceleration for the 30-800 mm/s speed range. It uses PT1/8 ports with standard PT threads.
Airtac SCT80~100 Multi-Position Tandem Cylinder SCT80X50X30S Technical Specifications
| Model | Airtac SCT80~100 Multi-Position Tandem Cylinder SCT80X50X30S |
|---|---|
| Series | SCT multi-position tie-rod cylinder |
| Bore size | Ø80 mm |
| Stroke 1 / Stroke 2 | 50 / 30 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) | 50 mm |
| P2 (section 2) | 30 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 SCT80X50X30S
| SCT | Multi-position (tandem) tie-rod cylinder series. |
|---|---|
| 80 | Bore size in mm (SCT range 32–100). |
| ×50 | Stroke 1 (section 1) in mm. |
| ×30 | 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 SCT80X50X30S Is Used
Two-Stage Part Diverting
Use the four positions (0, 30, 50, 80 mm) to route parts to three separate conveyor lanes from a single infeed point, with the magnet confirming each stop before the next cycle.
Multi-Depth Pressing
Control a pressing tool to two distinct depths (30 mm and 50 mm) plus full retract and full extend, ideal for forming parts that require a shallow pre-form before the final press depth.
Sequential Clamping
Clamp a workpiece with low force at the 30 mm position for alignment, then apply full clamping pressure at the 50 mm position, with sensor verification at each stage via the built-in magnet.
Is the Airtac SCT80~100 Multi-Position Tandem Cylinder SCT80X50X30S the Right Cylinder?
Select the SCT80X50X30S when an application needs four discrete mechanical stops without the complexity of servo control. This tandem configuration replaces two separate cylinders and external hard stops, reducing alignment work and footprint. If higher force is required, step up to the 100 mm bore SCT100, which provides 3927 N push per section at 0.5 MPa; for a lighter load, the 63 mm bore offers 1559 N.
For direct replacement, match the 80 mm bore, both 50 mm and 30 mm section strokes, the built-in magnet, and PT port threads. The SCT is a tie-rod cylinder and is not dimensionally interchangeable with ISO 15552 profiles. When the combined 80 mm stroke extends, guide the rod if the load applies any side force, as the 25 mm rod may deflect under off-axis loading.
Multi-position checklist
- ✓ Need 4 repeatable stops?
- ✓ Section strokes 50 + 30 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 SCT80X50X30S FAQ
This cylinder provides four discrete mechanical stops: 0 mm (fully retracted), 30 mm (first section extended), 50 mm (second section extended), and 80 mm (both sections extended, total travel). The stops are fixed by the two section strokes and are not infinitely adjustable.
No, the SCT80X50X30S will not hold its position if air pressure is lost or the directional valve is centered. The piston can drift under load. To lock the rod at an intermediate stop, you must add an external rod brake, a pilot-operated check valve, or a mechanical locking unit.
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