Airtac SCT80~100 Multi-Position Tandem Cylinder SCT80X100X155S
The AirTAC Airtac SCT80~100 Multi-Position Tandem Cylinder SCT80X100X155S is a genuine double-acting MULTI-POSITION (tandem) air cylinder: two piston sections of 100mm and 155mm give 4 controllable stop positions across a 255mm total travel, with a Ø80mm bore, PT3/8 ports and adjustable end cushioning.
- BoreØ80 mm
- Stroke 1100 mm
- Stroke 2155 mm
- Total travel255 mm
- Positions4 stops
- Port sizePT3/8
About the Airtac SCT80~100 Multi-Position Tandem Cylinder SCT80X100X155S
The SCT80X100X155S multi-position cylinder delivers four fixed, repeatable stop positions along its 255 mm total stroke: 0 mm (fully retracted), 100 mm, 155 mm, and 255 mm (fully extended). Each of the two tandem piston sections generates 2513 N of push force at 0.5 MPa, providing robust power for diverting or sorting tasks. The 25 mm diameter rod and PT3/8 ports ensure solid flow and mechanical rigidity.
This model includes a built-in magnet, allowing CMSG, DMSG, or EMSG sensors to be clamped directly onto the tie-rod barrel for non-contact position confirmation at any of the four stops. With a 28 mm adjustable air cushion on each section, the cylinder decelerates smoothly, making it a reliable choice for multi-step assembly fixtures where sensor feedback at each discrete position is critical.
Airtac SCT80~100 Multi-Position Tandem Cylinder SCT80X100X155S Technical Specifications
| Model | Airtac SCT80~100 Multi-Position Tandem Cylinder SCT80X100X155S |
|---|---|
| Series | SCT multi-position tie-rod cylinder |
| Bore size | Ø80 mm |
| Stroke 1 / Stroke 2 | 100 / 155 mm |
| Total travel | 255 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) | 100 mm |
| P2 (section 2) | 155 mm |
| P3 (both extended) | 255 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 SCT80X100X155S
| SCT | Multi-position (tandem) tie-rod cylinder series. |
|---|---|
| 80 | Bore size in mm (SCT range 32–100). |
| ×100 | Stroke 1 (section 1) in mm. |
| ×155 | 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 SCT80X100X155S Is Used
Two-Way Diverter Gate
Use the four discrete stops to position a diverter chute at a closed, partial-divert, full-divert, or bypass position, controlled by pressurizing each tandem section independently or together.
Multi-Stop Pallet Stop
Achieve two precise stopping heights for pallets on a conveyor line, with the 100 mm and 155 mm extensions acting as selectable lift positions for different processing stations.
Two-Depth Pressing Fixture
Control a pressing tool to two distinct depths in one cycle. The 100 mm stroke handles a pre-form operation, and the combined 255 mm stroke completes the final press, with sensor confirmation at each step via the built-in magnet.
Is the Airtac SCT80~100 Multi-Position Tandem Cylinder SCT80X100X155S the Right Cylinder?
Choose this 4-position SCT when a process requires two distinct mid-stroke stopping points, such as a diverter gate with a partial-open and full-open position. The tandem design is more compact and cost-effective than linking two separate cylinders with external hard stops. If your application demands higher force, stepping up to the SCT100 series provides 3927 N of push per section at the same 0.5 MPa pressure.
For direct replacement, match the 80 mm bore, both the 100 mm and 155 mm section strokes, PT thread, and the integrated magnet (-S suffix). Since the total extended length reaches 255 mm, ensure the rod is adequately guided if significant side loads are present, particularly when operating at the full 255 mm extension.
Multi-position checklist
- ✓ Need 4 repeatable stops?
- ✓ Section strokes 100 + 155 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 SCT80X100X155S FAQ
This 4-position cylinder stops at 0 mm (fully retracted), 100 mm (first section extended), 155 mm (second section extended), and 255 mm (both sections extended). The positions are fixed by the two stroke lengths and are not infinitely adjustable.
Yes. The -S suffix denotes a built-in magnet, making it fully compatible with AirTAC CMSG, DMSG, and EMSG series reed and solid-state sensors. These clamp directly to the cylinder's tie-rods for detecting piston position at any of the four stops.
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