Airtac SCT80~100 Multi-Position Tandem Cylinder SCT80X25X400S
The AirTAC Airtac SCT80~100 Multi-Position Tandem Cylinder SCT80X25X400S is a genuine double-acting MULTI-POSITION (tandem) air cylinder: two piston sections of 25mm and 400mm give 4 controllable stop positions across a 425mm total travel, with a Ø80mm bore, PT3/8 ports and adjustable end cushioning.
- BoreØ80 mm
- Stroke 125 mm
- Stroke 2400 mm
- Total travel425 mm
- Positions4 stops
- Port sizePT3/8
About the Airtac SCT80~100 Multi-Position Tandem Cylinder SCT80X25X400S
The SCT80X25X400S is a tandem multi-position cylinder providing four fixed rod positions: 0 mm (fully retracted), 25 mm, 400 mm, and the combined total travel of 425 mm. Each of its two piston sections delivers 2513 N of push force at 0.5 MPa, rising to 4523 N at the maximum operating pressure of 0.9 MPa, making it suitable for sequenced material handling tasks that require a short positioning step and a longer transfer stroke.
This model features a built-in magnet, allowing direct mounting of CMSG, DMSG, or EMSG sensors along the tie-rod barrel for non-contact position feedback. With a 25 mm rod diameter and a 28 mm adjustable air cushion, the cylinder provides reliable end-of-stroke deceleration. The body length A is 296 mm, and the standard PT3/8 ports supply each section independently.
Airtac SCT80~100 Multi-Position Tandem Cylinder SCT80X25X400S Technical Specifications
| Model | Airtac SCT80~100 Multi-Position Tandem Cylinder SCT80X25X400S |
|---|---|
| Series | SCT multi-position tie-rod cylinder |
| Bore size | Ø80 mm |
| Stroke 1 / Stroke 2 | 25 / 400 mm |
| Total travel | 425 mm |
| Stop positions | 4 positions |
| Acting type | Double acting (tandem, multi-position) |
| Port size | PT3/8 |
| 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, 28 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) | 25 mm |
| P2 (section 2) | 400 mm |
| P3 (both extended) | 425 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 (Ø80mm)
| Pressure | Push force | Pull force |
|---|---|---|
| 0.5 MPa | 2513 N | 2268 N |
| 0.7 MPa | 3519 N | — |
| Max (@1.0 MPa) | 513 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 SCT80X25X400S
| SCT | Multi-position (tandem) tie-rod cylinder series. |
|---|---|
| 80 | Bore size in mm (SCT range 32–100). |
| ×25 | Stroke 1 (section 1) in mm. |
| ×400 | 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 SCT80X25X400S Is Used
Two-Stage Diverter Gate
Actuate a diverter gate to a partial-open position at 25 mm for sampling, then extend fully to 425 mm to redirect the main product flow onto a separate conveyor line.
Sequenced Clamping and Feeding
Use the 25 mm stroke for a low-force pre-clamp or registration stop, then advance the full 425 mm to feed a component into a press or assembly nest.
Multi-Stop Pusher
Push a carton 25 mm to square it against a rail, then complete the 400 mm transfer stroke to move it into a case packer, all from one compact cylinder unit.
Is the Airtac SCT80~100 Multi-Position Tandem Cylinder SCT80X25X400S the Right Cylinder?
Select the SCT80X25X400S when your application needs two distinct, repeatable stop points beyond the home position without the complexity of two separate cylinders and external stops. The 80 mm bore provides a mid-range force output; if higher thrust is needed, stepping up to the 100 mm bore offers 3927 N of push per section at 0.5 MPa. For a drop-in replacement, match the 80 mm bore, both strokes of 25 mm and 400 mm, the PT thread, and the built-in magnet (-S suffix).
Because the second stroke extends to 400 mm, consider the rod's buckling resistance under compressive loads. If the load is not guided externally or is applied off-center, a rigid external guide or rod support is recommended to prevent bending and ensure long seal life.
Multi-position checklist
- ✓ Need 4 repeatable stops?
- ✓ Section strokes 25 + 400 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 SCT80X25X400S FAQ
This cylinder provides 4 discrete rod positions: 0 mm (fully retracted), 25 mm, 400 mm, and 425 mm. The 25 mm and 400 mm stops are achieved by pressurizing the respective piston sections independently, while the 425 mm total travel is reached by pressurizing both sections simultaneously.
Yes. The -S suffix designates a built-in magnetic ring on the piston, which is compatible with AirTAC's CMSG, DMSG, and EMSG series of reed and solid-state sensors. These sensors clamp directly onto the cylinder's tie-rod body for detecting each of the four positions.
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