Airtac SCT80~100 Multi-Position Tandem Cylinder SCT80X175X40
The AirTAC Airtac SCT80~100 Multi-Position Tandem Cylinder SCT80X175X40 is a genuine double-acting MULTI-POSITION (tandem) air cylinder: two piston sections of 175mm and 40mm give 4 controllable stop positions across a 215mm total travel, with a Ø80mm bore, PT3/8 ports and adjustable end cushioning.
- BoreØ80 mm
- Stroke 1175 mm
- Stroke 240 mm
- Total travel215 mm
- Positions4 stops
- Port sizePT3/8
About the Airtac SCT80~100 Multi-Position Tandem Cylinder SCT80X175X40
The SCT80X175X40 is an 80 mm bore tandem cylinder that creates four fixed rod positions by combining two independent piston sections on a common rod line. With section strokes of 175 mm and 40 mm, the reachable stops are 0 mm (fully retracted), 40 mm, 175 mm, and the full 215 mm total travel. Each actuated section delivers 2513 N of push force at 0.5 MPa, rising to 4523 N at the 0.9 MPa maximum operating pressure, driven through a 25 mm diameter rod.
A PT3/8 port supplies each end, and the tie-rod construction incorporates a 28 mm adjustable air cushion to decelerate the piston smoothly. The body length A(SCT) for this configuration is 296 mm. This genuine AirTAC multi-position actuator suits sorting, diverting, or two-depth pressing tasks where a single cylinder must hit three intermediate stops without external hard stops or multiple valves.
Airtac SCT80~100 Multi-Position Tandem Cylinder SCT80X175X40 Technical Specifications
| Model | Airtac SCT80~100 Multi-Position Tandem Cylinder SCT80X175X40 |
|---|---|
| Series | SCT multi-position tie-rod cylinder |
| Bore size | Ø80 mm |
| Stroke 1 / Stroke 2 | 175 / 40 mm |
| Total travel | 215 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) | 175 mm |
| P2 (section 2) | 40 mm |
| P3 (both extended) | 215 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 SCT80X175X40
| SCT | Multi-position (tandem) tie-rod cylinder series. |
|---|---|
| 80 | Bore size in mm (SCT range 32–100). |
| ×175 | Stroke 1 (section 1) in mm. |
| ×40 | 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 SCT80X175X40 Is Used
Four-Position Diverter Gate
The four discrete stops (0, 40, 175, 215 mm) route product into four separate lanes on a conveyor. Pressurise section one, section two, or both to select the correct gate position without needing servo control.
Two-Depth Press with Intermediate Rest
Achieve a shallow 40 mm pre-press, a deep 175 mm forming stroke, and a full 215 mm ejection stroke from one tandem cylinder. The intermediate 40 mm position is ideal for part registration before the main forming force is applied.
Multi-Stop Clamping Fixture
Clamp two different part families on one fixture by using the 40 mm and 175 mm stops. The 215 mm full-open position provides generous clearance for part loading and unloading, reducing changeover time.
Is the Airtac SCT80~100 Multi-Position Tandem Cylinder SCT80X175X40 the Right Cylinder?
Choose the SCT80X175X40 when your machine needs four distinct linear positions from one compact assembly, eliminating the complexity of two separate cylinders and their mounting brackets. If the 2513 N push force per section at 0.5 MPa is more than your load requires, stepping down to a 63 mm bore provides 1559 N per section; for heavier work, the 100 mm bore delivers 3927 N per section at the same pressure. The 175 mm section stroke is well within standard range, so no special lead time applies.
For direct replacement, match an AirTAC SCT with an 80 mm bore, both 175 mm and 40 mm section strokes, PT thread, and basic mounting. Because the longer 175 mm stroke can introduce a side-load moment at full extension, ensure the rod is guided externally or the load is aligned on the rod centreline to prevent bending.
Multi-position checklist
- ✓ Need 4 repeatable stops?
- ✓ Section strokes 175 + 40 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 SCT80X175X40 FAQ
It provides four discrete mechanical stops: 0 mm (fully retracted), 40 mm, 175 mm, and 215 mm (total travel). The positions are fixed by the two section strokes and are selected by pressurising the first section, the second section, or both simultaneously.
Yes, if your application requires two fixed stroke lengths from a single rod line. The SCT80X175X40 combines a 175 mm and a 40 mm stroke in one tie-rod body, saving space and eliminating the need to synchronise two separate actuators. Ensure the replacement matches the 80 mm bore, both stroke values, PT ports, and basic mounting.
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