Airtac SCT80~100 Multi-Position Tandem Cylinder SCT80X25X350S
The AirTAC Airtac SCT80~100 Multi-Position Tandem Cylinder SCT80X25X350S is a genuine double-acting MULTI-POSITION (tandem) air cylinder: two piston sections of 25mm and 350mm give 4 controllable stop positions across a 375mm total travel, with a Ø80mm bore, PT3/8 ports and adjustable end cushioning.
- BoreØ80 mm
- Stroke 125 mm
- Stroke 2350 mm
- Total travel375 mm
- Positions4 stops
- Port sizePT3/8
About the Airtac SCT80~100 Multi-Position Tandem Cylinder SCT80X25X350S
The SCT80X25X350S is a double-acting multi-position pneumatic cylinder that delivers four distinct rod positions from a single tie-rod assembly: 0 mm (fully retracted), 25 mm, 350 mm, and the combined total travel of 375 mm. With an 80 mm bore and a robust 25 mm diameter piston rod, each actuated section generates a push force of 2513 N at 0.5 MPa, scaling up to 4523 N at the maximum operating pressure of 0.9 MPa, making it suitable for sequenced material handling tasks.
This specific model includes a built-in magnet (-S suffix), allowing direct mounting of CMSG, DMSG, or EMSG sensors on the barrel for non-contact position feedback at each stop. The cylinder body has an A dimension of 296 mm and uses PT3/8 ports with an adjustable pneumatic cushion length of 28 mm for smooth deceleration. Operating on filtered air, it functions reliably in standard temperatures from -20 to +70 °C with its default TPU seals.
Airtac SCT80~100 Multi-Position Tandem Cylinder SCT80X25X350S Technical Specifications
| Model | Airtac SCT80~100 Multi-Position Tandem Cylinder SCT80X25X350S |
|---|---|
| Series | SCT multi-position tie-rod cylinder |
| Bore size | Ø80 mm |
| Stroke 1 / Stroke 2 | 25 / 350 mm |
| Total travel | 375 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) | 350 mm |
| P3 (both extended) | 375 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 SCT80X25X350S
| SCT | Multi-position (tandem) tie-rod cylinder series. |
|---|---|
| 80 | Bore size in mm (SCT range 32–100). |
| ×25 | Stroke 1 (section 1) in mm. |
| ×350 | 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 SCT80X25X350S Is Used
Two-Stage Sorting Gate
Use the 25 mm stroke to nudge a part into a quality-check lane and the full 375 mm stroke to divert rejects into a separate bin, all from one compact actuator with sensor-confirmed positions.
Dual-Depth Press Feeding
Advance a workpiece to a shallow 25 mm stop for a pre-forming operation, then extend to the full 375 mm to push it into the main press die, eliminating the need for two independent feed cylinders.
Multi-Stop Assembly Indexing
Index a pallet through a four-step assembly process using the discrete 0, 25, 350, and 375 mm rod positions, with CMSG sensors verifying each stop before the next operation begins.
Is the Airtac SCT80~100 Multi-Position Tandem Cylinder SCT80X25X350S the Right Cylinder?
Select the SCT80X25X350S when your application requires two distinct extended positions without the complexity and alignment costs of mounting two separate cylinders or external hard stops. This tandem unit provides a compact, pre-aligned solution for a short 25 mm advance and a longer 350 mm stroke. If the per-section force requirement is lower, stepping down to a 63 mm bore reduces the push force to 1559 N at 0.5 MPa, while stepping up to a 100 mm bore increases it to 3927 N.
As a direct replacement, match the 80 mm bore, both the 25 mm and 350 mm section strokes, PT port thread, and the built-in magnet. Because the longer 350 mm section stroke can introduce side-loading on the rod, ensure the external load is guided or supported to prevent bending and premature seal wear, especially when the rod is fully extended to the 375 mm position.
Multi-position checklist
- ✓ Need 4 repeatable stops?
- ✓ Section strokes 25 + 350 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 SCT80X25X350S FAQ
This 4-position cylinder provides discrete mechanical stops at 0 mm (fully retracted), 25 mm (first section extended), 350 mm (second section extended), and 375 mm (both sections extended for total travel). You select the position by pressurizing the appropriate cylinder sections.
Yes, it is designed to replace two individually mounted cylinders that perform sequential strokes of 25 mm and 350 mm. The SCT ensures perfect axial alignment between the two strokes and reduces the overall footprint. Ensure the replacement matches the 80 mm bore, PT3/8 ports, and the -S magnet option for sensor compatibility.
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