Airtac SCT80~100 Multi-Position Tandem Cylinder SCT100X25X225S
The AirTAC Airtac SCT80~100 Multi-Position Tandem Cylinder SCT100X25X225S is a genuine double-acting MULTI-POSITION (tandem) air cylinder: two piston sections of 25mm and 225mm give 4 controllable stop positions across a 250mm total travel, with a Ø100mm bore, PT1/2 ports and adjustable end cushioning.
- BoreØ100 mm
- Stroke 125 mm
- Stroke 2225 mm
- Total travel250 mm
- Positions4 stops
- Port sizePT1/2
About the Airtac SCT80~100 Multi-Position Tandem Cylinder SCT100X25X225S
The SCT100X25X225S is a tandem multi-position cylinder that delivers four discrete rod stops from two piston sections on a common rod line. With a 25 mm short stroke on one section and a 225 mm stroke on the other, the reachable positions are 0 mm, 25 mm, 225 mm, and the full combined travel of 250 mm. Each section generates a push force of 3927 N at 0.5 MPa, rising to 7068 N at the 0.9 MPa maximum operating pressure, driven by a robust 25 mm diameter rod.
This model includes a built-in magnet, allowing direct attachment of CMSG, DMSG, or EMSG reed and solid-state sensors to the tie-rod barrel for non-contact position feedback. The cylinder body has a base length A of 308 mm and uses a 29 mm adjustable air cushion on each section to decelerate the piston smoothly at end-of-stroke. It is a genuine AirTAC unit configured with the standard TPU seals and PT port threads, suitable for ambient temperatures from -20 to +70 °C.
Airtac SCT80~100 Multi-Position Tandem Cylinder SCT100X25X225S Technical Specifications
| Model | Airtac SCT80~100 Multi-Position Tandem Cylinder SCT100X25X225S |
|---|---|
| Series | SCT multi-position tie-rod cylinder |
| Bore size | Ø100 mm |
| Stroke 1 / Stroke 2 | 25 / 225 mm |
| Total travel | 250 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) | 25 mm |
| P2 (section 2) | 225 mm |
| P3 (both extended) | 250 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 SCT100X25X225S
| SCT | Multi-position (tandem) tie-rod cylinder series. |
|---|---|
| 100 | Bore size in mm (SCT range 32–100). |
| ×25 | Stroke 1 (section 1) in mm. |
| ×225 | 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 SCT100X25X225S Is Used
Two-Stage Diverter Gate
Use the four positions to direct product flow to three separate lanes: retracted for lane one, 25 mm for lane two, 225 mm for lane three, and fully extended at 250 mm for a maintenance bypass.
Multi-Depth Pressing
Achieve a shallow 25 mm pre-press depth and a deeper 225 mm final forming depth in a single cycle, with the 250 mm total stroke providing clearance for part ejection.
Sequential Part Staging
Index a workpiece through three precise stations on an assembly line by stopping at 25 mm for adhesive dispensing, 225 mm for component placement, and 250 mm for a final inspection position.
Is the Airtac SCT80~100 Multi-Position Tandem Cylinder SCT100X25X225S the Right Cylinder?
Choose the SCT100X25X225S when your application needs four fixed stopping points along a single linear axis without the complexity of two separate cylinders and external hard stops. The 100 mm bore provides a high per-section push force of 3927 N at 0.5 MPa, which is a significant step up from the 2513 N offered by the next smaller 80 mm bore. If your load requires less force, downsizing to an 80 mm bore SCT will reduce air consumption and physical footprint. For direct replacement, match the 100 mm bore, both the 25 mm and 225 mm section strokes, the PT port thread, the basic mounting configuration, and the integrated magnet suffix -S. Because the 225 mm section stroke exceeds 200 mm, evaluate the rod for potential side-loading and consider an external guide or rod support if the load is not perfectly axial.
Multi-position checklist
- ✓ Need 4 repeatable stops?
- ✓ Section strokes 25 + 225 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 SCT100X25X225S FAQ
This cylinder provides four distinct mechanical stop positions: 0 mm (fully retracted), 25 mm (section one extended), 225 mm (section two extended), and 250 mm (both sections extended, total travel). The positions are achieved by pressurizing the two piston sections independently or simultaneously.
Yes, it is a direct functional replacement that simplifies plumbing and mounting. To be a drop-in match, the replacement must be an SCT with a 100 mm bore, 25 mm and 225 mm section strokes, PT port threads, basic mounting, and the -S magnet option for sensor compatibility. The integrated tandem design ensures the two strokes share a common rod axis, eliminating alignment issues between two separate actuators.
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