Airtac SCT80~100 Multi-Position Tandem Cylinder SCT80X240X200
The AirTAC Airtac SCT80~100 Multi-Position Tandem Cylinder SCT80X240X200 is a genuine double-acting MULTI-POSITION (tandem) air cylinder: two piston sections of 240mm and 200mm give 4 controllable stop positions across a 440mm total travel, with a Ø80mm bore, PT3/8 ports and adjustable end cushioning.
- BoreØ80 mm
- Stroke 1240 mm
- Stroke 2200 mm
- Total travel440 mm
- Positions4 stops
- Port sizePT3/8
About the Airtac SCT80~100 Multi-Position Tandem Cylinder SCT80X240X200
The SCT80X240X200 is a tandem multi-position pneumatic cylinder that provides four fixed rod positions by combining two independent piston sections on a common rod line. With strokes of 240 mm and 200 mm, the achievable stops are 0 mm (fully retracted), 200 mm, 240 mm, and the total travel of 440 mm, giving designers a simple, all-pneumatic way to sequence a 25 mm rod through four discrete locations without complex servo controls.
Each 80 mm bore section generates 2513 N of push force and 2268 N of pull force at 0.5 MPa, scaling up to 4523 N push at the maximum operating pressure of 0.9 MPa. The cylinder body has a total length A(SCT) of 296 mm plus strokes, uses a PT3/8 port, and features a 28 mm adjustable air cushion on both ends to decelerate the moving mass smoothly. As a tie-rod design, it is built for straightforward maintenance and robust industrial cycling.
Airtac SCT80~100 Multi-Position Tandem Cylinder SCT80X240X200 Technical Specifications
| Model | Airtac SCT80~100 Multi-Position Tandem Cylinder SCT80X240X200 |
|---|---|
| Series | SCT multi-position tie-rod cylinder |
| Bore size | Ø80 mm |
| Stroke 1 / Stroke 2 | 240 / 200 mm |
| Total travel | 440 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) | 240 mm |
| P2 (section 2) | 200 mm |
| P3 (both extended) | 440 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 SCT80X240X200
| SCT | Multi-position (tandem) tie-rod cylinder series. |
|---|---|
| 80 | Bore size in mm (SCT range 32–100). |
| ×240 | Stroke 1 (section 1) in mm. |
| ×200 | 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 SCT80X240X200 Is Used
Four-Position Sorting Gate
Direct a conveyor diverter gate to four distinct angles: home (0 mm), a partial divert at 200 mm, a secondary chute at 240 mm, and a full bypass at 440 mm, all controlled by two 5/3 valves.
Multi-Depth Pressing Station
Execute a two-stage pressing operation where the first section extends 200 mm for a pre-form, the second section adds 40 mm more for a 240 mm intermediate depth, and both together reach the final 440 mm bottom-dead-center.
Sequential Part Feeding
Advance a pusher plate to three different pick-and-place columns: a 200 mm lane, a 240 mm lane, and a 440 mm lane, eliminating the need for three separate single-stroke cylinders on a packaging line.
Is the Airtac SCT80~100 Multi-Position Tandem Cylinder SCT80X240X200 the Right Cylinder?
Select the SCT80X240X200 when your application needs four distinct mechanical stops without the cost of two separate actuators and external hard stops. The 240 mm and 200 mm stroke combination is particularly useful for two-step feeding or sorting where the sequence distance is not symmetrical. If your force requirement is lower, stepping down to a 63 mm bore reduces the per-section push to 1559 N at 0.5 MPa, saving space and air consumption. For a higher thrust requirement, the 100 mm bore provides 3927 N per section at the same pressure. When replacing an existing unit, match the 80 mm bore, the exact 240 mm and 200 mm strokes, PT port thread, and the basic mounting style. For strokes exceeding 300 mm on a single section, evaluate the rod bending moment and consider external guiding to prevent side-load wear on the 25 mm rod and its bushing.
Multi-position checklist
- ✓ Need 4 repeatable stops?
- ✓ Section strokes 240 + 200 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 SCT80X240X200 FAQ
This tandem cylinder provides four discrete mechanical stops: 0 mm (fully retracted), 200 mm (second section extended), 240 mm (first section extended), and 440 mm (both sections extended). The positions are fixed by the two stroke lengths and are not infinitely adjustable.
No, the SCT does not have an internal locking mechanism. If air pressure is exhausted or a valve centers, the piston can drift from the 240 mm position under load. To securely hold a load at any intermediate stop without live pressure, you must add an external rod brake or a pilot-operated check valve.
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