Airtac SCT80~100 Multi-Position Tandem Cylinder SCT80X120X200
The AirTAC Airtac SCT80~100 Multi-Position Tandem Cylinder SCT80X120X200 is a genuine double-acting MULTI-POSITION (tandem) air cylinder: two piston sections of 120mm and 200mm give 4 controllable stop positions across a 320mm total travel, with a Ø80mm bore, PT3/8 ports and adjustable end cushioning.
- BoreØ80 mm
- Stroke 1120 mm
- Stroke 2200 mm
- Total travel320 mm
- Positions4 stops
- Port sizePT3/8
About the Airtac SCT80~100 Multi-Position Tandem Cylinder SCT80X120X200
The SCT80X120X200 is a double-acting tandem cylinder that delivers four fixed rod positions from a single compact assembly: 0 mm (fully retracted), 120 mm, 200 mm, and the combined total travel of 320 mm. Each 80 mm bore section generates 2513 N of push force at 0.5 MPa, giving you robust, repeatable stopping power without the complexity of servo systems.
Built on a durable tie-rod design with a 25 mm diameter rod and PT3/8 ports, this cylinder includes a 28 mm air cushion in each section for smooth deceleration at end-of-stroke. The body length A(SCT) is 296 mm, and the maximum thrust reaches 4523 N per section at 0.9 MPa, making it a workhorse for multi-step material handling.
Airtac SCT80~100 Multi-Position Tandem Cylinder SCT80X120X200 Technical Specifications
| Model | Airtac SCT80~100 Multi-Position Tandem Cylinder SCT80X120X200 |
|---|---|
| Series | SCT multi-position tie-rod cylinder |
| Bore size | Ø80 mm |
| Stroke 1 / Stroke 2 | 120 / 200 mm |
| Total travel | 320 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) | 120 mm |
| P2 (section 2) | 200 mm |
| P3 (both extended) | 320 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 SCT80X120X200
| SCT | Multi-position (tandem) tie-rod cylinder series. |
|---|---|
| 80 | Bore size in mm (SCT range 32–100). |
| ×120 | 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 SCT80X120X200 Is Used
Two-Stage Part Diverting
Use the four discrete positions to route parts to three different conveyor lanes. Retract for lane 1, extend to 120 mm for lane 2, extend to 200 mm for lane 3, and fully extend to 320 mm to bypass all lanes.
Multi-Depth Pressing
Control a pressing tool to two distinct depths in one cycle. The 120 mm stroke sets a shallow pre-form depth, while the 200 mm stroke completes the final form, all within a single actuator footprint.
Sequential Clamping
Clamp a workpiece with low force at the 120 mm position for alignment, then apply full clamping force at the 200 mm position. The 320 mm total travel provides a wide clearance for part loading and unloading.
Is the Airtac SCT80~100 Multi-Position Tandem Cylinder SCT80X120X200 the Right Cylinder?
Choose the SCT80X120X200 when your process needs four distinct mechanical stops without the cost of two separate cylinders and external hard stops. It simplifies plumbing and control logic compared to a dual-cylinder setup. If your force requirement is lower, stepping down to the 63 mm bore provides 1559 N of push per section at 0.5 MPa. For a direct replacement, match the 80 mm bore, both 120 mm and 200 mm strokes, PT port thread, and basic mounting style. If a section stroke exceeds 300 mm, consider adding external guide rods to protect the 25 mm rod from side-load deflection.
Multi-position checklist
- ✓ Need 4 repeatable stops?
- ✓ Section strokes 120 + 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 SCT80X120X200 FAQ
This tandem cylinder provides four discrete mechanical stops: 0 mm (fully retracted), 120 mm (section 1 extended), 200 mm (section 2 extended), and 320 mm (both sections extended). The positions are fixed by the two stroke lengths and are not infinitely adjustable.
The SCT integrates two piston sections on a single common rod, which guarantees the relative distance between stops is mechanically fixed and more repeatable than two independent cylinders with external stops. It also reduces mounting hardware, saves space, and simplifies the pneumatic circuit by requiring only two directional valves to achieve all four positions.
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