Airtac SCT80~100 Multi-Position Tandem Cylinder SCT80X35X105
The AirTAC Airtac SCT80~100 Multi-Position Tandem Cylinder SCT80X35X105 is a genuine double-acting MULTI-POSITION (tandem) air cylinder: two piston sections of 35mm and 105mm give 4 controllable stop positions across a 140mm total travel, with a Ø80mm bore, PT3/8 ports and adjustable end cushioning.
- BoreØ80 mm
- Stroke 135 mm
- Stroke 2105 mm
- Total travel140 mm
- Positions4 stops
- Port sizePT3/8
About the Airtac SCT80~100 Multi-Position Tandem Cylinder SCT80X35X105
The SCT80X35X105 is an 80 mm bore multi-position pneumatic cylinder that provides four distinct rod positions along its 140 mm total travel. By pressurising one or both tandem piston sections, the rod stops precisely at 0 mm (fully retracted), 35 mm, 105 mm, or the full 140 mm extension. Each actuated section generates 2513 N of push force at 0.5 MPa, rising to 4523 N at the maximum operating pressure of 0.9 MPa.
This tie-rod cylinder uses a 25 mm diameter rod with M20x1.5 threads and PT3/8 ports. The adjustable air cushion at each end is 28 mm long, providing smooth deceleration. With a body length A(SCT) of 296 mm, it fits into compact multi-stop setups where two separate cylinders would be bulkier and require complex sequencing.
Airtac SCT80~100 Multi-Position Tandem Cylinder SCT80X35X105 Technical Specifications
| Model | Airtac SCT80~100 Multi-Position Tandem Cylinder SCT80X35X105 |
|---|---|
| Series | SCT multi-position tie-rod cylinder |
| Bore size | Ø80 mm |
| Stroke 1 / Stroke 2 | 35 / 105 mm |
| Total travel | 140 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) | 35 mm |
| P2 (section 2) | 105 mm |
| P3 (both extended) | 140 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 SCT80X35X105
| SCT | Multi-position (tandem) tie-rod cylinder series. |
|---|---|
| 80 | Bore size in mm (SCT range 32–100). |
| ×35 | Stroke 1 (section 1) in mm. |
| ×105 | 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 SCT80X35X105 Is Used
Two-Way Part Diverting
Use the 35 mm stroke to shift a diverter gate to a bypass lane and the 105 mm stroke to send parts to a secondary conveyor, achieving three distinct routing paths from one compact actuator.
Multi-Depth Pressing
Set a shallow pre-press at the 35 mm stop and a full-depth forming stroke at 140 mm. The intermediate 105 mm position can be used for a separate sizing or calibration step.
Staged Clamping Fixture
Operate a two-stage clamp: the first 35 mm of travel brings the jaw into light contact, and full extension to 140 mm applies high clamping force, with the 105 mm stop acting as a part-present check position.
Is the Airtac SCT80~100 Multi-Position Tandem Cylinder SCT80X35X105 the Right Cylinder?
Choose the SCT80X35X105 when your application needs four fixed mechanical stops without the cost of servo positioning. The unequal strokes (35 mm and 105 mm) give you two intermediate positions that are ideal for a short feed followed by a longer transfer stroke. If the 2513 N push force per section at 0.5 MPa is more than required, stepping down to a 63 mm bore provides 1559 N per section. For a direct replacement, match the 80 mm bore, both 35 mm and 105 mm strokes, PT3/8 port thread, and the basic mounting configuration. If a section stroke exceeds 300 mm, consider external guides to manage rod deflection under side loads.
Multi-position checklist
- ✓ Need 4 repeatable stops?
- ✓ Section strokes 35 + 105 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 SCT80X35X105 FAQ
This tandem cylinder provides four discrete rod positions: 0 mm (fully retracted), 35 mm, 105 mm, and 140 mm (full extension). The positions are fixed by the two piston strokes and are selected by pressurising the front section, rear section, or both simultaneously.
The SCT integrates both strokes on a single common rod line, which eliminates the need for external couplings and complex valve sequencing to synchronise two independent cylinders. It provides a mechanically simpler, more compact solution with a single mounting footprint, reducing assembly time and potential misalignment issues in multi-position applications.
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