Airtac SCT80~100 Multi-Position Tandem Cylinder SCT100X125X25S
The AirTAC Airtac SCT80~100 Multi-Position Tandem Cylinder SCT100X125X25S is a genuine double-acting MULTI-POSITION (tandem) air cylinder: two piston sections of 125mm and 25mm give 4 controllable stop positions across a 150mm total travel, with a Ø100mm bore, PT1/2 ports and adjustable end cushioning.
- BoreØ100 mm
- Stroke 1125 mm
- Stroke 225 mm
- Total travel150 mm
- Positions4 stops
- Port sizePT1/2
About the Airtac SCT80~100 Multi-Position Tandem Cylinder SCT100X125X25S
The SCT100X125X25S is a double-acting multi-position tandem cylinder that delivers four discrete rod positions: 0 mm (fully retracted), 25 mm, 125 mm, and the total travel of 150 mm. This specific configuration is achieved by pressurizing its two piston sections independently or simultaneously, making it a compact alternative to complex multi-actuator setups for sequenced linear movements. The built-in magnet allows direct mounting of CMSG, DMSG, or EMSG sensors for reliable end-of-stroke or intermediate position detection.
Each piston section generates a substantial push force of 3927 N at 0.5 MPa, rising to 7068 N at the maximum operating pressure of 0.9 MPa. Built on a durable tie-rod construction with a 25 mm diameter rod and PT1/2 ports, the cylinder body has an A(SCT) length of 308 mm and features an adjustable pneumatic cushion of 29 mm for smooth deceleration at each stop.
Airtac SCT80~100 Multi-Position Tandem Cylinder SCT100X125X25S Technical Specifications
| Model | Airtac SCT80~100 Multi-Position Tandem Cylinder SCT100X125X25S |
|---|---|
| Series | SCT multi-position tie-rod cylinder |
| Bore size | Ø100 mm |
| Stroke 1 / Stroke 2 | 125 / 25 mm |
| Total travel | 150 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) | 25 mm |
| P3 (both extended) | 150 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 SCT100X125X25S
| SCT | Multi-position (tandem) tie-rod cylinder series. |
|---|---|
| 100 | Bore size in mm (SCT range 32–100). |
| ×125 | 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 SCT100X125X25S Is Used
Two-Stage Part Diverting
A conveyor diverter uses the 125 mm stroke to move across the main line and the 25 mm stroke for a final precise push onto a secondary lane, creating a reliable 4-position sorting gate.
Sequential Clamping
A welding fixture uses the 25 mm stroke for a low-force pre-clamp to position a delicate part, followed by the full 125 mm stroke to engage the main high-force clamp, preventing damage.
Multi-Depth Pressing
A small assembly press uses the 25 mm stop for a partial insertion depth and the 125 mm stop for a full-depth press, all within a single compact tandem cylinder unit.
Is the Airtac SCT80~100 Multi-Position Tandem Cylinder SCT100X125X25S the Right Cylinder?
This 4-position model is ideal when an application requires two distinct extended stops that are not equidistant, such as a 125 mm primary advance and a 25 mm secondary positioning stroke. For higher force requirements, stepping up to this 100 mm bore from an 80 mm bore (2513 N push at 0.5 MPa) provides a significant thrust increase. If a 3-position configuration with equal strokes is sufficient, a model like SCT100X125X125 would offer stops at 0, 125, and 250 mm. A direct replacement must match the 100 mm bore, both 125 mm and 25 mm strokes, PT1/2 ports, and the integrated magnet (-S). Given the 125 mm stroke on the primary section, ensure the external load is guided if there is any risk of side-loading to prevent rod bending and premature seal wear.
Multi-position checklist
- ✓ Need 4 repeatable stops?
- ✓ Section strokes 125 + 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 SCT100X125X25S FAQ
This tandem cylinder provides four discrete rod positions: 0 mm (fully retracted), 25 mm (section 2 extended), 125 mm (section 1 extended), and 150 mm (both sections extended for total travel).
The force is generated per actuated piston section. For the 100 mm bore, one section provides 3927 N of push force at 0.5 MPa. The force does not double when both sections are pressurized to reach the 150 mm position; it remains the single-section output.
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