Airtac SCT80~100 Multi-Position Tandem Cylinder SCT80X40X40
The AirTAC Airtac SCT80~100 Multi-Position Tandem Cylinder SCT80X40X40 is a genuine double-acting MULTI-POSITION (tandem) air cylinder: two piston sections of 40mm and 40mm give 3 controllable stop positions across a 80mm total travel, with a Ø80mm bore, PT3/8 ports and adjustable end cushioning.
- BoreØ80 mm
- Stroke 140 mm
- Stroke 240 mm
- Total travel80 mm
- Positions3 stops
- Port sizePT3/8
About the Airtac SCT80~100 Multi-Position Tandem Cylinder SCT80X40X40
The SCT80X40X40 is an 80 mm bore multi-position pneumatic cylinder that provides three fixed rod positions: fully retracted (0 mm), 40 mm, and the total travel of 80 mm. Each of its two piston sections generates a push force of 2513 N at 0.5 MPa, scaling up to 4523 N at the maximum operating pressure of 0.9 MPa, driven through a robust 25 mm diameter rod.
This tie-rod cylinder uses PT3/8 ports and features an adjustable air cushion with a 28 mm cushion length to decelerate the piston smoothly at each end of the 80 mm total stroke. The body length A for this model is 296 mm, making it a compact solution for applications requiring two distinct extended positions without the complexity of multiple actuators.
Airtac SCT80~100 Multi-Position Tandem Cylinder SCT80X40X40 Technical Specifications
| Model | Airtac SCT80~100 Multi-Position Tandem Cylinder SCT80X40X40 |
|---|---|
| Series | SCT multi-position tie-rod cylinder |
| Bore size | Ø80 mm |
| Stroke 1 / Stroke 2 | 40 / 40 mm |
| Total travel | 80 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) | 40 mm |
| P2 (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 SCT80X40X40
| SCT | Multi-position (tandem) tie-rod cylinder series. |
|---|---|
| 80 | Bore size in mm (SCT range 32–100). |
| ×40 | 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 SCT80X40X40 Is Used
Two-Way Part Diverting
A single SCT80X40X40 can direct parts down one of two lanes. The rod extends to 40 mm for the first lane and 80 mm for the second, eliminating a second actuator and simplifying the conveyor control logic.
Multi-Stop Stamping Eject
In a stamping press, this cylinder ejects parts in two stages: a 40 mm stroke to clear the die, followed by a full 80 mm stroke to push the part onto an outfeed chute, using the 2513 N per-section force at 0.5 MPa.
Two-Depth Assembly Press
For inserting a bearing to a precise depth and then a seal to a shallower depth, the SCT80X40X40 provides the 40 mm and 80 mm stop positions. The 4523 N of thrust at 0.9 MPa handles light to medium press-fit operations.
Is the Airtac SCT80~100 Multi-Position Tandem Cylinder SCT80X40X40 the Right Cylinder?
Select the SCT80X40X40 when your process needs a single actuator to reliably stop at 0, 40, and 80 mm, such as for a two-stage pusher or diverter gate. This tandem cylinder replaces two separate 80 mm bore cylinders and a mounting bracket, simplifying the pneumatic circuit and reducing alignment work. If your force requirement is lower, consider stepping down to the 63 mm bore SCT63X40X40, which provides 1559 N of push per section at 0.5 MPa.
For a direct replacement, match an AirTAC SCT cylinder with an 80 mm bore, both strokes set to 40 mm, PT port threads, and basic mounting. The short 40 mm strokes keep the rod well-supported within the bearing, so external guides are typically unnecessary unless the load has a significant radial component.
Multi-position checklist
- ✓ Need 3 repeatable stops?
- ✓ Section strokes 40 + 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 SCT80X40X40 FAQ
This model has 3 distinct rod positions because both stroke sections are equal at 40 mm. The positions are 0 mm (fully retracted), 40 mm (first section extended), and 80 mm (both sections extended for total travel).
Each of the two piston sections provides a push force of 2513 N at 0.5 MPa and 4523 N at 0.9 MPa. The pull force per section is 2268 N at 0.5 MPa. These forces do not add together; the cylinder applies the force of one section to move the load to the next position.
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