Airtac SCT80~100 Multi-Position Tandem Cylinder SCT80X50X30
The AirTAC Airtac SCT80~100 Multi-Position Tandem Cylinder SCT80X50X30 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 SCT80X50X30
The AirTAC SCT80X50X30 is a tie-rod multi-position tandem cylinder that delivers four fixed rod positions from two independently controlled piston sections. With a 50 mm front stroke and a 30 mm rear stroke, the rod can be precisely located at 0 mm (fully retracted), 50 mm, 30 mm, or the combined total travel of 80 mm. Each 80 mm bore section generates a push force of 2513 N at 0.5 MPa, rising to 4523 N at 0.9 MPa, driven through a rigid 25 mm diameter piston rod.
This double-acting cylinder uses filtered air and operates between 0.15 and 1.0 MPa, with an adjustable pneumatic cushion at each end to decelerate the load smoothly. The cushion length is 28 mm, and the standard body length A(SCT) is 296 mm. PT3/8 ports are standard. The SCT80X50X30 is ideal for diverting, sorting, or multi-depth pressing tasks where two separate cylinders would add complexity and misalignment risk.
Airtac SCT80~100 Multi-Position Tandem Cylinder SCT80X50X30 Technical Specifications
| Model | Airtac SCT80~100 Multi-Position Tandem Cylinder SCT80X50X30 |
|---|---|
| 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 SCT80X50X30
| 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 SCT80X50X30 Is Used
Two-Way Part Diverting
Use the four discrete positions to direct parts from a single infeed lane into two separate outfeed lanes. The rod extends to 50 mm for lane A, retracts to 30 mm for lane B, or goes to full 80 mm travel for a reject chute.
Multi-Depth Pressing
Perform a two-stage pressing or staking operation with one compact actuator. The first section advances to a 30 mm pre-press position, and the second section drives to the full 50 mm or combined 80 mm for the final forming depth.
Sequential Clamping
Clamp a workpiece with an initial light hold at the 30 mm position, then apply full clamping force by pressurizing both sections to reach the 80 mm total travel. This prevents damage to delicate components during the first contact.
Is the Airtac SCT80~100 Multi-Position Tandem Cylinder SCT80X50X30 the Right Cylinder?
Choose the SCT tandem cylinder when your process needs three or four fixed mechanical stops without the bulk, plumbing, and alignment challenges of two separate actuators. For this 80 mm bore, the per-section push force is 2513 N at 0.5 MPa; if your load is lighter, stepping down to a 63 mm bore (1559 N at 0.5 MPa) can reduce air consumption and footprint. A direct replacement must match the 80 mm bore, both the 50 mm and 30 mm strokes, PT port thread, and basic mounting configuration. Since the longest section stroke here is only 50 mm, side-loading and rod buckling are minimal, but always guide the load externally if significant radial forces are present.
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 SCT80X50X30 FAQ
This tandem cylinder provides four discrete mechanical stops: 0 mm (fully retracted), 50 mm (front section extended), 30 mm (rear section extended), and 80 mm (both sections extended, total travel). You select the position by pressurizing the corresponding cylinder section or both sections together.
The SCT tandem unit integrates both strokes on a single common rod and body, guaranteeing perfect axial alignment between the two stop positions. It eliminates the need to mount, align, and plumb two separate cylinders, saving space, reducing leak points, and simplifying the control architecture for multi-stop applications.
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