Airtac SCT80~100 Multi-Position Tandem Cylinder SCT80X50X75S
The AirTAC Airtac SCT80~100 Multi-Position Tandem Cylinder SCT80X50X75S is a genuine double-acting MULTI-POSITION (tandem) air cylinder: two piston sections of 50mm and 75mm give 4 controllable stop positions across a 125mm total travel, with a Ø80mm bore, PT3/8 ports and adjustable end cushioning.
- BoreØ80 mm
- Stroke 150 mm
- Stroke 275 mm
- Total travel125 mm
- Positions4 stops
- Port sizePT3/8
About the Airtac SCT80~100 Multi-Position Tandem Cylinder SCT80X50X75S
This SCT80X50X75S tandem cylinder provides four fixed rod positions—0 mm, 50 mm, 75 mm, and the full combined stroke of 125 mm—by selectively pressurising its two piston sections. Each 80 mm bore section delivers a push force of 2513 N at 0.5 MPa, rising to 4523 N at the maximum operating pressure of 0.9 MPa, driven through a rigid 25 mm diameter rod.
The built-in magnet (denoted by the -S suffix) allows direct mounting of CMSG, DMSG, or EMSG solid-state sensors along the tie-rod barrel for non-contact position feedback. With a PT3/8 port, standard TPU seals for -20 to +70 °C operation, and a 28 mm adjustable air cushion in each section, this genuine AirTAC actuator replaces complex multi-cylinder setups in sorting and diverting stations.
Airtac SCT80~100 Multi-Position Tandem Cylinder SCT80X50X75S Technical Specifications
| Model | Airtac SCT80~100 Multi-Position Tandem Cylinder SCT80X50X75S |
|---|---|
| Series | SCT multi-position tie-rod cylinder |
| Bore size | Ø80 mm |
| Stroke 1 / Stroke 2 | 50 / 75 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) | 50 mm |
| P2 (section 2) | 75 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 SCT80X50X75S
| SCT | Multi-position (tandem) tie-rod cylinder series. |
|---|---|
| 80 | Bore size in mm (SCT range 32–100). |
| ×50 | Stroke 1 (section 1) in mm. |
| ×75 | 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 SCT80X50X75S Is Used
Two-Way Part Diverting
Use the four discrete stops (0, 50, 75, 125 mm) to guide parts into two separate lanes or accept/reject stations from a single feed conveyor.
Multi-Depth Pressing
Achieve a shallow 50 mm press depth and a deeper 75 mm press depth in one cycle, with the 125 mm position used for part ejection or clearance.
Staged Clamping Fixture
Clamp a workpiece with partial force at the 50 mm position, apply full force at 75 mm, and retract fully to 0 mm for unloading, all with sensor confirmation via the built-in magnet.
Is the Airtac SCT80~100 Multi-Position Tandem Cylinder SCT80X50X75S the Right Cylinder?
Choose the SCT80X50X50S when you need three equal-step positions, or this SCT80X50X75S for four distinct stops to handle a two-depth process in one stroke. If your load requires less force, stepping down to a 63 mm bore reduces per-section push to 1559 N at 0.5 MPa; for heavier payloads, the 100 mm bore provides 3927 N. When replacing an existing unit, match the 80 mm bore, both strokes (50 mm and 75 mm), the PT3/8 thread, and the integrated magnet to retain sensor functionality. For strokes over 300 mm, consider external guides to protect the 25 mm rod from side loads.
Multi-position checklist
- ✓ Need 4 repeatable stops?
- ✓ Section strokes 50 + 75 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 SCT80X50X75S FAQ
This tandem cylinder provides four discrete mechanical stops: fully retracted (0 mm), first section extended (50 mm), second section extended (75 mm), and both sections extended for the total travel of 125 mm.
Yes, it consolidates two fixed-stroke movements into a single compact unit on one rod line, reducing mounting hardware and eliminating the need to synchronise two separate actuators. Ensure the replacement matches the 80 mm bore, 50 mm and 75 mm strokes, PT3/8 ports, and the -S magnet option.
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