Airtac SCT80~100 Multi-Position Tandem Cylinder SCT100X350X50
The AirTAC Airtac SCT80~100 Multi-Position Tandem Cylinder SCT100X350X50 is a genuine double-acting MULTI-POSITION (tandem) air cylinder: two piston sections of 350mm and 50mm give 4 controllable stop positions across a 400mm total travel, with a Ø100mm bore, PT1/2 ports and adjustable end cushioning.
- BoreØ100 mm
- Stroke 1350 mm
- Stroke 250 mm
- Total travel400 mm
- Positions4 stops
- Port sizePT1/2
About the Airtac SCT80~100 Multi-Position Tandem Cylinder SCT100X350X50
The SCT100X350X50 is a double-acting tandem cylinder that provides four fixed rod positions: 0 mm (fully retracted), 50 mm, 350 mm, and the total travel of 400 mm. Each 100 mm bore section generates a push force of 3927 N at 0.5 MPa, making it suitable for heavy-duty material handling tasks that require two distinct extended stopping points without complex servo controls.
This tie-rod cylinder features a 25 mm diameter piston rod with an M20x1.5 male thread and PT1/2 ports. The adjustable pneumatic cushion at each end cap has a cushion length of 29 mm, and the base body length A(SCT) is 308 mm, providing a robust platform for integrating into multi-step assembly or sorting fixtures.
Airtac SCT80~100 Multi-Position Tandem Cylinder SCT100X350X50 Technical Specifications
| Model | Airtac SCT80~100 Multi-Position Tandem Cylinder SCT100X350X50 |
|---|---|
| Series | SCT multi-position tie-rod cylinder |
| Bore size | Ø100 mm |
| Stroke 1 / Stroke 2 | 350 / 50 mm |
| Total travel | 400 mm |
| Stop positions | 4 positions |
| Acting type | Double acting (tandem, multi-position) |
| Port size | PT1/2 |
| 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, 29 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) | 350 mm |
| P2 (section 2) | 50 mm |
| P3 (both extended) | 400 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 (Ø100mm)
| Pressure | Push force | Pull force |
|---|---|---|
| 0.5 MPa | 3927 N | 3682 N |
| 0.7 MPa | 5498 N | — |
| Max (@1.0 MPa) | 801 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 SCT100X350X50
| SCT | Multi-position (tandem) tie-rod cylinder series. |
|---|---|
| 100 | Bore size in mm (SCT range 32–100). |
| ×350 | Stroke 1 (section 1) in mm. |
| ×50 | 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 SCT100X350X50 Is Used
Two-Stage Diverter Gate
Operates a chute gate with a partial-open position at 50 mm for sampling and a full-open position at 400 mm for bulk flow, controlled by pressurizing the appropriate cylinder sections.
Multi-Depth Pallet Stop
Provides two raised stop heights for pallets on a conveyor. The 50 mm stroke lifts a low-profile stop for light totes, while the full 400 mm travel engages a heavy-duty stop for full pallets.
Selective Part Clamping
Clamps two different part families in a machining center. The 350 mm stroke closes the main clamp, and the additional 50 mm stroke applies a secondary, higher-pressure clamp for a specific part variant.
Is the Airtac SCT80~100 Multi-Position Tandem Cylinder SCT100X350X50 the Right Cylinder?
Choose the SCT tandem cylinder when a single actuator must reliably stop at two different extended positions, eliminating the need for two separate cylinders and their associated mounting hardware. For this 100 mm bore, the per-section push force is 3927 N at 0.5 MPa; if your application requires less force, stepping down to an 80 mm bore provides 2513 N of push force per section at the same pressure.
To replace this unit, match the 100 mm bore, the 350 mm first stroke, the 50 mm second stroke, and the PT port thread. The basic mounting configuration means no additional brackets are included, so verify your existing fixture uses direct body mounting. With a combined stroke of 400 mm, ensure the rod is adequately guided if significant side loads are present to prevent bending.
Multi-position checklist
- ✓ Need 4 repeatable stops?
- ✓ Section strokes 350 + 50 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 SCT100X350X50 FAQ
This tandem cylinder provides four discrete rod positions: 0 mm (retracted), 50 mm (second section extended), 350 mm (first section extended), and 400 mm (both sections extended). The positions are fixed by the two stroke lengths and are not infinitely adjustable.
No. Like all standard pneumatic cylinders, the SCT100X350X50 will not hold its position if air pressure is lost or the directional valve is centered. The rod can drift or drop under load. To safely hold a load at the 350 mm or any intermediate position without pressure, you must add an external mechanical rod lock or a pilot-operated check valve.
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