Airtac SCT80~100 Multi-Position Tandem Cylinder SCT100X50X25S
The AirTAC Airtac SCT80~100 Multi-Position Tandem Cylinder SCT100X50X25S is a genuine double-acting MULTI-POSITION (tandem) air cylinder: two piston sections of 50mm and 25mm give 4 controllable stop positions across a 75mm total travel, with a Ø100mm bore, PT1/2 ports and adjustable end cushioning.
- BoreØ100 mm
- Stroke 150 mm
- Stroke 225 mm
- Total travel75 mm
- Positions4 stops
- Port sizePT1/2
About the Airtac SCT80~100 Multi-Position Tandem Cylinder SCT100X50X25S
The SCT100X50X25S is a double-acting multi-position cylinder that provides four fixed rod positions: 0 mm (fully retracted), 25 mm, 50 mm, and the total extended length of 75 mm. By pressurizing its two tandem piston sections independently or together, you can index between these stops without external hard stops or complex servo controls. Each 100 mm bore section generates a push force of 3927 N at 0.5 MPa, rising to 7068 N at the maximum operating pressure of 0.9 MPa.
This model includes a built-in magnet (-S suffix), allowing standard CMSG, DMSG, or EMSG sensors to clamp directly onto the tie-rod barrel for non-contact position sensing at each stop. The robust 25 mm diameter rod and 29 mm air cushion at each end provide smooth deceleration, while the body length A(SCT) of 308 mm ensures it fits compact machine envelopes. It operates on standard 40 µm filtered air with PT1/2 port threads.
Airtac SCT80~100 Multi-Position Tandem Cylinder SCT100X50X25S Technical Specifications
| Model | Airtac SCT80~100 Multi-Position Tandem Cylinder SCT100X50X25S |
|---|---|
| Series | SCT multi-position tie-rod cylinder |
| Bore size | Ø100 mm |
| Stroke 1 / Stroke 2 | 50 / 25 mm |
| Total travel | 75 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) | 25 mm |
| P3 (both extended) | 75 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 SCT100X50X25S
| SCT | Multi-position (tandem) tie-rod cylinder series. |
|---|---|
| 100 | Bore size in mm (SCT range 32–100). |
| ×50 | 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 SCT100X50X25S Is Used
Two-Stage Diverter Gate
Use the four positions to route packages to three separate conveyor lanes. Retracted (0 mm) closes the gate, 25 mm diverts to lane one, 50 mm to lane two, and full extension (75 mm) sends product straight through.
Multi-Depth Pressing
Control a platen to two distinct pressing depths in a single cycle. The 25 mm stroke sets a pre-compression height, while the 50 mm stroke delivers the final forming depth, with the sensor confirming each position.
Sequential Part Staging
Advance a workpiece through three precise locations on an assembly fixture. The SCT100X50X25S indexes from a safe load position (0 mm) to an adhesive station (25 mm), a curing station (50 mm), and an ejection point (75 mm).
Is the Airtac SCT80~100 Multi-Position Tandem Cylinder SCT100X50X25S the Right Cylinder?
Choose the SCT tandem cylinder when your application requires two or more fixed stopping points along a single linear axis, eliminating the cost and alignment complexity of mounting two separate cylinders back-to-back. This 100 mm bore model is ideal for high-force indexing; if your force requirement is lower, stepping down to an 80 mm bore (2513 N push at 0.5 MPa) can reduce air consumption and physical size. For direct replacement, match the 100 mm bore, both strokes (50 mm and 25 mm), the PT port thread, and the integrated magnet (-S). This basic mounting version allows you to use the cylinder body for direct mounting or add FA/FB flanges or CA/CB clevises from the SCT accessory range.
Multi-position checklist
- ✓ Need 4 repeatable stops?
- ✓ Section strokes 50 + 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 SCT100X50X25S FAQ
This cylinder provides four discrete mechanical stops because its two stroke lengths are different. The rod positions are 0 mm (fully retracted), 25 mm (only the second section extended), 50 mm (only the first section extended), and 75 mm (both sections fully extended).
Yes, if your sequence requires two fixed strokes on the same axis. The SCT100X50X25S integrates both strokes into a single tie-rod body, ensuring perfect axial alignment and reducing plumbing. Ensure the replacement matches the 100 mm bore, the specific 50 mm and 25 mm strokes, PT1/2 ports, and the -S magnet option for sensor compatibility.
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