Airtac SCT80~100 Multi-Position Tandem Cylinder SCT100X25X25S
The AirTAC Airtac SCT80~100 Multi-Position Tandem Cylinder SCT100X25X25S is a genuine double-acting MULTI-POSITION (tandem) air cylinder: two piston sections of 25mm and 25mm give 3 controllable stop positions across a 50mm total travel, with a Ø100mm bore, PT1/2 ports and adjustable end cushioning.
- BoreØ100 mm
- Stroke 125 mm
- Stroke 225 mm
- Total travel50 mm
- Positions3 stops
- Port sizePT1/2
About the Airtac SCT80~100 Multi-Position Tandem Cylinder SCT100X25X25S
The SCT100X25X25S is a tandem multi-position cylinder providing three fixed rod positions: fully retracted (0 mm), extended to the first stroke (25 mm), and fully extended at the combined travel (50 mm). Each of its two piston sections delivers a push force of 3927 N at 0.5 MPa, scaling up to 7068 N at the maximum operating pressure of 0.9 MPa, driven through a robust 25 mm diameter rod.
This model includes an integrated magnet, allowing direct mounting of CMSG, DMSG, or EMSG sensors on the tie-rod barrel for reliable, non-contact position feedback. The body length A is 308 mm with a 29 mm adjustable air cushion at each end, and it uses a PT1/2 port with an M20x1.5 rod thread. The cylinder operates on 40 µm filtered air and is a genuine AirTAC unit built for precise, repetitive stopping tasks.
Airtac SCT80~100 Multi-Position Tandem Cylinder SCT100X25X25S Technical Specifications
| Model | Airtac SCT80~100 Multi-Position Tandem Cylinder SCT100X25X25S |
|---|---|
| Series | SCT multi-position tie-rod cylinder |
| Bore size | Ø100 mm |
| Stroke 1 / Stroke 2 | 25 / 25 mm |
| Total travel | 50 mm |
| Stop positions | 3 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 (3)
| Position | Rod extension |
|---|---|
| P0 (retracted) | 0 mm |
| P1 (section 1) | 25 mm |
| P2 (both extended) | 50 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 SCT100X25X25S
| SCT | Multi-position (tandem) tie-rod cylinder series. |
|---|---|
| 100 | Bore size in mm (SCT range 32–100). |
| ×25 | Stroke 1 (section 1) in mm. |
| ×25 | 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 SCT100X25X25S Is Used
3-Position Sorting Gate
Directs packages to three separate conveyor lanes by stopping the rod at 0 mm (lane 1), 25 mm (lane 2), or 50 mm (lane 3). The built-in magnet confirms each stop position to the PLC.
Two-Depth Pressing Station
Executes a shallow pre-press at the 25 mm stop and a full-depth final press at 50 mm. The 3927 N per-section force at 0.5 MPa handles dense material compaction consistently.
Multi-Stop Clamping Fixture
Clamps workpieces of two different thicknesses without manual adjustment. The sensor-equipped SCT100X25X25S verifies the clamp has reached the correct discrete stop before machining begins.
Is the Airtac SCT80~100 Multi-Position Tandem Cylinder SCT100X25X25S the Right Cylinder?
Choose the SCT100X25X25S when an application requires a compact, three-position actuator with sensor feedback, eliminating the complexity of mounting external stops or aligning two separate cylinders. The 100 mm bore provides substantial force for heavy sorting gates or large diverters. If the force requirement is lower, stepping down to an 80 mm bore reduces the per-section push force to 2513 N at 0.5 MPa, which may allow for a smaller valve and lower air consumption.
For a direct replacement, match the 100 mm bore, both 25 mm section strokes, PT port thread, and the integrated magnet. The basic mounting configuration accepts the full SCT accessory range, including FA/FB flanges and CA/CB clevises, should the mounting style need to change later. As both strokes are short, rod buckling is not a concern here.
Multi-position checklist
- ✓ Need 3 repeatable stops?
- ✓ Section strokes 25 + 25 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 SCT100X25X25S FAQ
It provides three distinct mechanical stops because the two 25 mm strokes are equal. The rod positions are fully retracted (0 mm), extended by the first section (25 mm), and extended by both sections for the total travel (50 mm).
Yes, the SCT100X25X25S is a direct dimensional and functional replacement for a non-magnet SCT100X25X25, provided the extra length for the magnet band does not interfere with the mounting. It adds the capability to use CMSG/DMSG sensors for position confirmation, which the standard model lacks.
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