Airtac SCT80~100 Multi-Position Tandem Cylinder SCT80X80X70S
The AirTAC Airtac SCT80~100 Multi-Position Tandem Cylinder SCT80X80X70S is a genuine double-acting MULTI-POSITION (tandem) air cylinder: two piston sections of 80mm and 70mm give 4 controllable stop positions across a 150mm total travel, with a Ø80mm bore, PT3/8 ports and adjustable end cushioning.
- BoreØ80 mm
- Stroke 180 mm
- Stroke 270 mm
- Total travel150 mm
- Positions4 stops
- Port sizePT3/8
About the Airtac SCT80~100 Multi-Position Tandem Cylinder SCT80X80X70S
The SCT80X80X70S is a double-acting multi-position cylinder that provides four fixed rod positions: 0 mm (fully retracted), 80 mm, 70 mm, and 150 mm total travel. Each piston section generates 2513 N of push force at 0.5 MPa, giving you robust, repeatable stopping power for sequencing tasks without complex controls.
A built-in magnet allows direct mounting of CMSG, DMSG, or EMSG sensors on the 80 mm bore tie-rod body, simplifying end-of-stroke or mid-position detection. The 25 mm diameter rod and 28 mm air cushion at each end ensure smooth deceleration, while the PT3/8 ports supply ample flow for speeds up to 800 mm/s.
Airtac SCT80~100 Multi-Position Tandem Cylinder SCT80X80X70S Technical Specifications
| Model | Airtac SCT80~100 Multi-Position Tandem Cylinder SCT80X80X70S |
|---|---|
| Series | SCT multi-position tie-rod cylinder |
| Bore size | Ø80 mm |
| Stroke 1 / Stroke 2 | 80 / 70 mm |
| Total travel | 150 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) | 80 mm |
| P2 (section 2) | 70 mm |
| P3 (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 SCT80X80X70S
| SCT | Multi-position (tandem) tie-rod cylinder series. |
|---|---|
| 80 | Bore size in mm (SCT range 32–100). |
| ×80 | Stroke 1 (section 1) in mm. |
| ×70 | 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 SCT80X80X70S Is Used
Two-Stage Diverter Gate
Actuate a material diverter to three separate conveyor lanes using the 0 mm, 80 mm, and 150 mm positions, with the 70 mm stop serving as a precise intermediate alignment step before final extension.
Multi-Depth Pressing
Perform a light pre-press at the 70 mm stroke, a full forming press at 150 mm, and use the 80 mm position for a secondary tooling engagement, all from one compact tandem cylinder.
Sequential Part Feeding
Control a feeder mechanism that advances parts to a pick point (80 mm), a secondary inspection station (70 mm), and a final eject position (150 mm), reducing the need for multiple actuators.
Is the Airtac SCT80~100 Multi-Position Tandem Cylinder SCT80X80X70S the Right Cylinder?
Choose this 4-position SCT when a single actuator must stop a load at two distinct mid-travel points without adding external hard stops or a second cylinder. The 80 mm bore provides 2513 N push per section at 0.5 MPa; if your load is lighter, stepping down to a 63 mm bore (1559 N push) can reduce air consumption and physical size. For replacement, match the 80 mm bore, both 80 mm and 70 mm strokes, PT thread, basic mounting, and the -S magnet option exactly to ensure sensor compatibility and identical mounting dimensions.
Multi-position checklist
- ✓ Need 4 repeatable stops?
- ✓ Section strokes 80 + 70 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 SCT80X80X70S FAQ
This tandem cylinder provides four discrete rod positions: 0 mm (retracted), 80 mm (first section extended), 70 mm (second section extended), and 150 mm (both sections extended). The stops are fixed by the two stroke lengths and are not infinitely adjustable.
The SCT80X80X70S integrates two piston sections on a single common rod, giving you three or four fixed positions in a footprint only slightly longer than one cylinder. It eliminates the need to synchronize two separate actuators and their mounting brackets, simplifying the machine design and reducing the number of valves required.
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