Airtac SCT80~100 Multi-Position Tandem Cylinder SCT80X75X75S
The AirTAC Airtac SCT80~100 Multi-Position Tandem Cylinder SCT80X75X75S is a genuine double-acting MULTI-POSITION (tandem) air cylinder: two piston sections of 75mm and 75mm give 3 controllable stop positions across a 150mm total travel, with a Ø80mm bore, PT3/8 ports and adjustable end cushioning.
- BoreØ80 mm
- Stroke 175 mm
- Stroke 275 mm
- Total travel150 mm
- Positions3 stops
- Port sizePT3/8
About the Airtac SCT80~100 Multi-Position Tandem Cylinder SCT80X75X75S
The SCT80X75X75S is an 80 mm bore multi-position tandem cylinder that delivers three fixed rod positions: fully retracted (0 mm), 75 mm, and the combined 150 mm total travel. Each piston section generates 2513 N of push force at 0.5 MPa, rising to 4523 N at the 0.9 MPa maximum operating pressure, making it a robust actuator for heavy intermediate-stop tasks.
This model includes a built-in magnet (-S suffix), allowing direct mounting of CMSG, DMSG, or EMSG sensors along the tie-rod barrel for non-contact position feedback. It uses a 25 mm diameter piston rod, PT3/8 ports, and has a 28 mm adjustable air cushion at each end to manage the inertia of substantial guided loads.
Airtac SCT80~100 Multi-Position Tandem Cylinder SCT80X75X75S Technical Specifications
| Model | Airtac SCT80~100 Multi-Position Tandem Cylinder SCT80X75X75S |
|---|---|
| Series | SCT multi-position tie-rod cylinder |
| Bore size | Ø80 mm |
| Stroke 1 / Stroke 2 | 75 / 75 mm |
| Total travel | 150 mm |
| Stop positions | 3 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 (3)
| Position | Rod extension |
|---|---|
| P0 (retracted) | 0 mm |
| P1 (section 1) | 75 mm |
| P2 (both extended) | 150 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 SCT80X75X75S
| SCT | Multi-position (tandem) tie-rod cylinder series. |
|---|---|
| 80 | Bore size in mm (SCT range 32–100). |
| ×75 | 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 SCT80X75X75S Is Used
3-Position Diverter Gate
Operates a chute or gate on a conveyor line with three distinct positions: closed (0 mm), partial flow to lane A (75 mm), and full bypass to lane B (150 mm). The built-in magnet confirms each stop point for the control system.
Two-Stage Clamping Fixture
Provides a low-force pre-clamp at 75 mm extension to position a part, followed by a full-power clamp at 150 mm. The 2513 N push force per section at 0.5 MPa secures large weldments or assemblies.
Multi-Stop Material Stop
Acts as a retractable end-stop with two working positions for different product lengths on a packaging or saw-feed line. The sensor-ready design eliminates the need for external limit switches.
Is the Airtac SCT80~100 Multi-Position Tandem Cylinder SCT80X75X75S the Right Cylinder?
Choose the SCT80X75X75S when your process requires a pneumatic actuator to reliably stop at 0, 75, and 150 mm without the complexity of two separate cylinders and external hard stops. If your force requirement is lower, stepping down to a 63 mm bore SCT reduces the per-section push force to 1559 N at 0.5 MPa. For a direct replacement, match the 80 mm bore, both 75 mm section strokes, PT port thread, and the integrated magnet sensor option.
With a combined travel of 150 mm, rod deflection is typically not a primary concern, but for applications with significant radial loads, pairing the cylinder with an external guide rail is recommended to protect the rod bearing and seals from premature wear.
Multi-position checklist
- ✓ Need 3 repeatable stops?
- ✓ Section strokes 75 + 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 SCT80X75X75S FAQ
This model provides 3 distinct mechanical stop positions. Because both section strokes are equal at 75 mm, the rod can be positioned at 0 mm (fully retracted), 75 mm, and the total travel of 150 mm (both sections extended).
Yes, it is designed to replace a dual-cylinder setup where two different strokes are needed on the same axis. A direct replacement must match the 80 mm bore, both 75 mm strokes, the PT3/8 port thread, and the -S magnet option for sensor compatibility.
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