
The AirTAC Airtac SCT80~100 Multi-Position Tandem Cylinder SCT80X200X800S is a genuine double-acting MULTI-POSITION (tandem) air cylinder: two piston sections of 200mm and 800mm give 4 controllable stop positions across a 1000mm total travel, with a Ø80mm bore, PT3/8 ports and adjustable end cushioning.
The SCT80X200X800S is a tandem multi-position cylinder that delivers four discrete rod stops: 0 mm, 200 mm, 800 mm, and the full 1000 mm travel. Its 25 mm diameter rod and 28 mm air cushion at each end provide robust guidance and deceleration for the long combined stroke.
Each piston section generates 2513 N of push force at 0.5 MPa (4523 N at 0.9 MPa), making this unit suitable for sequenced material transfer where a short pick and a long place stroke are needed. The built-in magnet allows CMSG or DMSG sensors to confirm each of the four positions without external brackets.
| Model | Airtac SCT80~100 Multi-Position Tandem Cylinder SCT80X200X800S |
|---|---|
| Series | SCT multi-position tie-rod cylinder |
| Bore size | Ø80 mm |
| Stroke 1 / Stroke 2 | 200 / 800 mm |
| Total travel | 1000 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). This configuration exceeds the 500 mm standard section stroke, so it is a non-standard / made-to-order build. Confirm against the product label before installation. Thread options: PT (standard) / G.
| Position | Rod extension |
|---|---|
| P0 (retracted) | 0 mm |
| P1 (section 1) | 200 mm |
| P2 (section 2) | 800 mm |
| P3 (both extended) | 1000 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.
| 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.
| SCT | Multi-position (tandem) tie-rod cylinder series. |
|---|---|
| 80 | Bore size in mm (SCT range 32–100). |
| ×200 | Stroke 1 (section 1) in mm. |
| ×800 | 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.
A 200 mm stroke shifts a diverter gate to an intermediate lane, and the 800 mm stroke moves it to a far lane, enabling one cylinder to serve three conveyor destinations.
The 200 mm stroke positions a gripper at a shallow pick point, while the full 1000 mm travel reaches the bottom of a deep bin, with sensor confirmation at each level.
A 200 mm advance clamps a part, then the 800 mm section feeds it into a press. The four discrete stops allow retract, clamp, feed, and full-extend positions.
Choose the SCT80X200X800S when your process requires a short 200 mm advance and a separate 800 mm feed from a single rod line, eliminating the complexity of two independent cylinders and their couplers. If the 800 mm section’s 2513 N push is insufficient, stepping up to the SCT100 bore provides 3927 N per section at the same pressure. For replacement, match the 80 mm bore, both 200 mm and 800 mm strokes, PT port thread, basic mounting, and the -S magnet suffix exactly; an SCT with different stroke values will alter the stop positions.
Multi-position checklist
The four distinct rod positions are 0 mm (fully retracted), 200 mm (first section extended), 800 mm (second section extended), and 1000 mm (both sections extended). Pressurising the ports in different combinations selects each stop.
No. Like all pneumatic cylinders, the SCT80X200X800S will drift if pressure is exhausted. To hold a load at an intermediate stop without live air, you must add an external rod brake or a pilot-operated check valve on the relevant section’s port.
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