Airtac SCT80~100 Multi-Position Tandem Cylinder SCT100X75X200S
The AirTAC Airtac SCT80~100 Multi-Position Tandem Cylinder SCT100X75X200S is a genuine double-acting MULTI-POSITION (tandem) air cylinder: two piston sections of 75mm and 200mm give 4 controllable stop positions across a 275mm total travel, with a Ø100mm bore, PT1/2 ports and adjustable end cushioning.
- BoreØ100 mm
- Stroke 175 mm
- Stroke 2200 mm
- Total travel275 mm
- Positions4 stops
- Port sizePT1/2
About the Airtac SCT80~100 Multi-Position Tandem Cylinder SCT100X75X200S
The SCT100X75X200S is a double-acting multi-position tandem cylinder that delivers four fixed rod positions: fully retracted (0 mm), 75 mm, 200 mm, and the total extended travel of 275 mm. Each of its two 100 mm bore piston sections generates 3927 N of push force at 0.5 MPa, rising to 7068 N at the maximum operating pressure of 0.9 MPa, driven through a rigid 25 mm diameter rod.
This model includes a built-in magnet, allowing direct mounting of CMSG, DMSG, or EMSG sensors on the tie-rod barrel for non-contact position feedback. The cylinder body length is 308 mm, and it features an adjustable pneumatic cushion of 29 mm at each end to manage inertial loads quietly. It operates on standard 40 µm filtered air with PT1/2 port threads.
Airtac SCT80~100 Multi-Position Tandem Cylinder SCT100X75X200S Technical Specifications
| Model | Airtac SCT80~100 Multi-Position Tandem Cylinder SCT100X75X200S |
|---|---|
| Series | SCT multi-position tie-rod cylinder |
| Bore size | Ø100 mm |
| Stroke 1 / Stroke 2 | 75 / 200 mm |
| Total travel | 275 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) | 75 mm |
| P2 (section 2) | 200 mm |
| P3 (both extended) | 275 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 SCT100X75X200S
| SCT | Multi-position (tandem) tie-rod cylinder series. |
|---|---|
| 100 | Bore size in mm (SCT range 32–100). |
| ×75 | 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 SCT100X75X200S Is Used
Two-Stage Sorting Gate
Uses the 75 mm and 200 mm stops to divert packages onto three separate conveyor lanes from a single feed point, simplifying pneumatic control.
Multi-Depth Pressing
Provides a partial advance to 75 mm for a light pre-load and a full 200 mm stroke for the main pressing operation, all within one compact actuator.
Sequential Clamping Fixture
The 75 mm stop positions a clamp near the workpiece, and the 200 mm stroke applies full clamping force, reducing cycle time compared to a single long stroke.
Is the Airtac SCT80~100 Multi-Position Tandem Cylinder SCT100X75X200S the Right Cylinder?
Selecting the SCT100X75X200S provides a compact alternative to using two separate 100 mm bore cylinders with external hard stops to achieve a four-position sequence. The tandem design ensures the stop positions are mechanically fixed and repeatable. If a lower force per section is acceptable, stepping down to an 80 mm bore SCT model reduces the push force to 2513 N at 0.5 MPa, which can lower air consumption. For replacement, match the 100 mm bore, both strokes of 75 mm and 200 mm, the PT port thread, and the integrated magnet (-S suffix).
Multi-position checklist
- ✓ Need 4 repeatable stops?
- ✓ Section strokes 75 + 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 SCT100X75X200S FAQ
This tandem cylinder has four discrete positions: 0 mm (fully retracted), 75 mm (first section extended), 200 mm (second section extended), and 275 mm (both sections extended). The stops are fixed by the mechanical stroke lengths.
No, an SCT cylinder does not lock or hold position when air is exhausted. The piston will drift under load. If a load must be held at an intermediate stop without live pressure, you must add an external rod brake or a pilot-operated check valve.
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