Airtac SCT80~100 Multi-Position Tandem Cylinder SCT100X125X75S
The AirTAC Airtac SCT80~100 Multi-Position Tandem Cylinder SCT100X125X75S is a genuine double-acting MULTI-POSITION (tandem) air cylinder: two piston sections of 125mm and 75mm give 4 controllable stop positions across a 200mm total travel, with a Ø100mm bore, PT1/2 ports and adjustable end cushioning.
- BoreØ100 mm
- Stroke 1125 mm
- Stroke 275 mm
- Total travel200 mm
- Positions4 stops
- Port sizePT1/2
About the Airtac SCT80~100 Multi-Position Tandem Cylinder SCT100X125X75S
The SCT100X125X75S is a double-acting multi-position tandem cylinder that provides four distinct rod-end stop positions: fully retracted (0 mm), 75 mm, 125 mm, and the full combined travel of 200 mm. Each piston section delivers a powerful push force of 3927 N at 0.5 MPa, making this 100 mm bore unit suitable for heavy-duty sorting or material handling where discrete, repeatable stopping points are required.
This model includes a built-in magnet (-S suffix), allowing direct mounting of CMSG, DMSG, or EMSG sensors along the tie-rod barrel for reliable end-of-stroke or mid-stroke position feedback. The cylinder features a 25 mm diameter piston rod, PT 1/2 ports, and a 29 mm adjustable air cushion on each section to decelerate the load smoothly. Its body length A(SCT) is 308 mm.
Airtac SCT80~100 Multi-Position Tandem Cylinder SCT100X125X75S Technical Specifications
| Model | Airtac SCT80~100 Multi-Position Tandem Cylinder SCT100X125X75S |
|---|---|
| Series | SCT multi-position tie-rod cylinder |
| Bore size | Ø100 mm |
| Stroke 1 / Stroke 2 | 125 / 75 mm |
| Total travel | 200 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) | 125 mm |
| P2 (section 2) | 75 mm |
| P3 (both extended) | 200 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 SCT100X125X75S
| SCT | Multi-position (tandem) tie-rod cylinder series. |
|---|---|
| 100 | Bore size in mm (SCT range 32–100). |
| ×125 | Stroke 1 (section 1) in mm. |
| ×75 | 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 SCT100X125X75S Is Used
Multi-Stop Diverter Gate
Actuates a conveyor diverter to four precise positions—retracted, two intermediate sorting lanes, and fully extended—directing packages based on barcode data.
Two-Depth Press Operation
Provides a shallow 75 mm pre-press position and a deeper 125 mm final forming stroke from a single cylinder, eliminating the need for a secondary spacer or stop cylinder.
Staged Clamping Fixture
Positions a welding jig at three distinct heights for different component sizes, using the 75 mm and 125 mm strokes to set the fixture, with the 200 mm total extension for part loading clearance.
Is the Airtac SCT80~100 Multi-Position Tandem Cylinder SCT100X125X75S the Right Cylinder?
Choose the SCT tandem cylinder when an application requires two or more fixed stopping points that would otherwise need two separate cylinders and external hard stops. This design reduces plumbing and mounting complexity. If the 3927 N push force at 0.5 MPa is insufficient, stepping up is not possible as 100 mm is the maximum SCT bore; instead, consider increasing operating pressure up to 1.0 MPa for 7068 N of thrust per section. For a direct replacement, match the 100 mm bore, both strokes (125 mm and 75 mm), PT port thread, and the integrated magnet sensor feature.
Multi-position checklist
- ✓ Need 4 repeatable stops?
- ✓ Section strokes 125 + 75 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 SCT100X125X75S FAQ
This tandem cylinder provides four discrete mechanical stop positions: 0 mm (fully retracted), 75 mm (first section extended), 125 mm (second section extended), and the combined total travel of 200 mm (both sections extended). The stops are fixed by the two stroke lengths.
The force output is per actuated piston section. At 0.5 MPa, each section provides 3927 N of push force and 3681 N of pull force. The two sections do not add their force together for a multi-position move; the force remains the single-section value at any intermediate stop.
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