Airtac SCT80~100 Multi-Position Tandem Cylinder SCT100X50X125S
The AirTAC Airtac SCT80~100 Multi-Position Tandem Cylinder SCT100X50X125S is a genuine double-acting MULTI-POSITION (tandem) air cylinder: two piston sections of 50mm and 125mm give 4 controllable stop positions across a 175mm total travel, with a Ø100mm bore, PT1/2 ports and adjustable end cushioning.
- BoreØ100 mm
- Stroke 150 mm
- Stroke 2125 mm
- Total travel175 mm
- Positions4 stops
- Port sizePT1/2
About the Airtac SCT80~100 Multi-Position Tandem Cylinder SCT100X50X125S
The SCT100X50X125S is a double-acting multi-position cylinder that delivers four fixed rod positions from a single tandem body: 0 mm (fully retracted), 50 mm, 125 mm, and the total travel of 175 mm. Each 100 mm bore piston section generates 3927 N of push force at 0.5 MPa, rising to 7068 N at the maximum operating pressure of 0.9 MPa, while the 25 mm diameter hard-chrome rod and 29 mm air cushion provide robust, end-of-stroke deceleration.
This model includes a built-in magnet, allowing easy attachment of CMSG, DMSG, or EMSG reed and solid-state sensors directly onto the tie-rod barrel for position feedback without extra brackets. The standard PT ports and TPU seals suit general industrial environments from -20 to +70 °C, making it a ready-to-install solution for multi-stop actuation where four distinct mechanical positions are required.
Airtac SCT80~100 Multi-Position Tandem Cylinder SCT100X50X125S Technical Specifications
| Model | Airtac SCT80~100 Multi-Position Tandem Cylinder SCT100X50X125S |
|---|---|
| Series | SCT multi-position tie-rod cylinder |
| Bore size | Ø100 mm |
| Stroke 1 / Stroke 2 | 50 / 125 mm |
| Total travel | 175 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) | 50 mm |
| P2 (section 2) | 125 mm |
| P3 (both extended) | 175 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 SCT100X50X125S
| SCT | Multi-position (tandem) tie-rod cylinder series. |
|---|---|
| 100 | Bore size in mm (SCT range 32–100). |
| ×50 | Stroke 1 (section 1) in mm. |
| ×125 | 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 SCT100X50X125S Is Used
Four-Position Diverter Gate
Controls a flap or gate to four discrete angles for routing packages or bulk material on a conveyor. The 50 mm and 125 mm strokes provide a short and a long throw, creating four distinct flow paths from one compact actuator.
Two-Depth Pressing & Assembly
Executes a shallow 50 mm pre-press followed by a deeper 125 mm final insertion stroke, with a full 175 mm retract. The four positions allow a single cylinder to handle two different part depths without mechanical changeover.
Multi-Stop Clamping Fixture
Provides three clamping positions plus full retract for a welding or machining fixture. The integrated magnetic piston enables sensor confirmation at each stop, ensuring the part is correctly located before the cycle continues.
Is the Airtac SCT80~100 Multi-Position Tandem Cylinder SCT100X50X125S the Right Cylinder?
Selecting the SCT100X50X125S gives you four deterministic stop points without the complexity of two separate cylinders and external hard stops. The 50 mm and 125 mm section strokes are standard, keeping lead times short. If the 3927 N push force per section at 0.5 MPa exceeds your requirement, consider stepping down to the 80 mm bore SCT80 series, which provides 2513 N per section, reducing air consumption and physical envelope. For a drop-in replacement, match the 100 mm bore, both the 50 mm and 125 mm strokes, the PT port thread, and the built-in magnet (-S suffix); the mounting style must also match if the original unit used FA, FB, CA, CB, or LB accessories.
Multi-position checklist
- ✓ Need 4 repeatable stops?
- ✓ Section strokes 50 + 125 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 SCT100X50X125S FAQ
It provides four distinct mechanical stop positions: 0 mm (fully retracted), 50 mm (first section extended), 125 mm (second section extended), and 175 mm (both sections extended). Because the two strokes are different (50 mm and 125 mm), you get four unique stopping points, not three.
Yes, if your application requires the specific 50 mm and 125 mm strokes and the combined 175 mm travel. The SCT tandem design eliminates the need to synchronize two separate cylinders and their mounting hardware. Ensure the replacement matches the bore, both strokes, port thread (PT), and the magnet option (-S) if sensors are used.
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