Airtac SCT80~100 Multi-Position Tandem Cylinder SCT80X75X50S
The AirTAC Airtac SCT80~100 Multi-Position Tandem Cylinder SCT80X75X50S is a genuine double-acting MULTI-POSITION (tandem) air cylinder: two piston sections of 75mm and 50mm give 4 controllable stop positions across a 125mm total travel, with a Ø80mm bore, PT3/8 ports and adjustable end cushioning.
- BoreØ80 mm
- Stroke 175 mm
- Stroke 250 mm
- Total travel125 mm
- Positions4 stops
- Port sizePT3/8
About the Airtac SCT80~100 Multi-Position Tandem Cylinder SCT80X75X50S
The SCT80X75X50S is an 80 mm bore, double-acting multi-position cylinder that provides four fixed rod positions: fully retracted (0 mm), 50 mm, 75 mm, and the total travel of 125 mm. Each piston section generates a push force of 2513 N at 0.5 MPa, making it a powerful solution for diverting or sorting tasks that require distinct intermediate stops without complex controls.
This model includes a built-in magnet (-S suffix), allowing direct mounting of CMSG, DMSG, or EMSG sensors on the tie-rod barrel for reliable end-of-stroke and mid-stroke position feedback. The cylinder uses a 25 mm diameter rod, PT3/8 ports, and an M20x1.5 rod thread, with a 28 mm adjustable air cushion in each section to decelerate the load smoothly.
Airtac SCT80~100 Multi-Position Tandem Cylinder SCT80X75X50S Technical Specifications
| Model | Airtac SCT80~100 Multi-Position Tandem Cylinder SCT80X75X50S |
|---|---|
| Series | SCT multi-position tie-rod cylinder |
| Bore size | Ø80 mm |
| Stroke 1 / Stroke 2 | 75 / 50 mm |
| Total travel | 125 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) | 75 mm |
| P2 (section 2) | 50 mm |
| P3 (both extended) | 125 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 SCT80X75X50S
| SCT | Multi-position (tandem) tie-rod cylinder series. |
|---|---|
| 80 | Bore size in mm (SCT range 32–100). |
| ×75 | Stroke 1 (section 1) in mm. |
| ×50 | 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 SCT80X75X50S Is Used
Two-Stage Part Sorting
Use the 50 mm and 75 mm stop positions to divert parts onto two separate conveyor lanes from a single feed point, with sensor confirmation at each stop via the built-in magnet.
Multi-Depth Press Operation
Achieve two distinct pressing depths (50 mm and 75 mm) in a single cycle for assembling components with staged insertion requirements, using the full 125 mm travel for part ejection.
Sequential Gate Control
Operate a material gate with three open positions (50 mm, 75 mm, and 125 mm) to meter different material sizes onto a conveyor, with the 0 mm position providing a positive seal when closed.
Is the Airtac SCT80~100 Multi-Position Tandem Cylinder SCT80X75X50S the Right Cylinder?
Choose this 4-position tandem cylinder when a process needs to stop at two different intermediate points along a single linear axis, eliminating the cost and complexity of two separate actuators and their mounting hardware. The unequal strokes (75 mm and 50 mm) create a unique set of discrete stops that can handle, for example, a two-stage part ejection followed by a full retract.
For applications needing more force, stepping up to the SCT100 bore provides 3927 N of push per section at the same 0.5 MPa pressure. This SCT80X75X50S is a direct replacement for an identical AirTAC model with the same bore, both stroke lengths, PT ports, and the -S magnet option. Ensure the rod is externally guided if the combined 125 mm stroke creates a side-loading condition.
Multi-position checklist
- ✓ Need 4 repeatable stops?
- ✓ Section strokes 75 + 50 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 SCT80X75X50S FAQ
This tandem cylinder provides four discrete mechanical stops: 0 mm (fully retracted), 50 mm (section 2 extended), 75 mm (section 1 extended), and 125 mm (both sections extended, total travel). The stops are fixed by the two stroke lengths and are not infinitely adjustable.
Yes, it is designed to replace two independent actuators in applications requiring two intermediate positions. It must match the original in bore (80 mm), both strokes (75 mm and 50 mm), PT port thread, and the -S magnet option for sensor compatibility. Mounting accessories like FA or LB flanges must also be matched if originally equipped.
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