Airtac SCT80~100 Multi-Position Tandem Cylinder SCT80X250X250
The AirTAC Airtac SCT80~100 Multi-Position Tandem Cylinder SCT80X250X250 is a genuine double-acting MULTI-POSITION (tandem) air cylinder: two piston sections of 250mm and 250mm give 3 controllable stop positions across a 500mm total travel, with a Ø80mm bore, PT3/8 ports and adjustable end cushioning.
- BoreØ80 mm
- Stroke 1250 mm
- Stroke 2250 mm
- Total travel500 mm
- Positions3 stops
- Port sizePT3/8
About the Airtac SCT80~100 Multi-Position Tandem Cylinder SCT80X250X250
The SCT80X250X250 is an 80 mm bore multi-position tandem cylinder delivering three fixed rod positions: fully retracted (0 mm), mid-stroke (250 mm), and full extension (500 mm). Each piston section generates 2513 N of push force at 0.5 MPa, scaling to 4523 N at the maximum operating pressure of 0.9 MPa, making it a robust actuator for heavy intermediate stopping tasks.
This double-acting unit uses a 25 mm diameter rod and PT3/8 ports, with a 28 mm adjustable air cushion at each end for smooth deceleration. The tie-rod body construction has an overall length A of 296 mm. It operates on filtered air from 0.15 to 1.0 MPa and is fitted with standard TPU seals for a temperature range of -20 to +70 °C.
Airtac SCT80~100 Multi-Position Tandem Cylinder SCT80X250X250 Technical Specifications
| Model | Airtac SCT80~100 Multi-Position Tandem Cylinder SCT80X250X250 |
|---|---|
| Series | SCT multi-position tie-rod cylinder |
| Bore size | Ø80 mm |
| Stroke 1 / Stroke 2 | 250 / 250 mm |
| Total travel | 500 mm |
| Stop positions | 3 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 (3)
| Position | Rod extension |
|---|---|
| P0 (retracted) | 0 mm |
| P1 (section 1) | 250 mm |
| P2 (both extended) | 500 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 SCT80X250X250
| SCT | Multi-position (tandem) tie-rod cylinder series. |
|---|---|
| 80 | Bore size in mm (SCT range 32–100). |
| ×250 | Stroke 1 (section 1) in mm. |
| ×250 | 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 SCT80X250X250 Is Used
Two-Stage Pallet Stop
Controls pallet flow on a gravity conveyor by extending to 250 mm to stop the lead pallet, then to 500 mm to release it while holding the next, providing sequenced traffic control.
Dual-Position Part Marking
Positions a marking head at two precise heights (250 mm and 500 mm) to apply batch codes on different-sized products passing on a single line without manual adjustment.
Intermediate Clamping Station
Provides a partial-clamp position at 250 mm for delicate alignment and a full-clamp position at 500 mm for high-pressure machining, all from one compact tandem unit.
Is the Airtac SCT80~100 Multi-Position Tandem Cylinder SCT80X250X250 the Right Cylinder?
Choose the SCT80X250X250 when your application requires a heavy load to stop reliably at the midpoint and end of a 500 mm stroke, eliminating the complexity of two separate cylinders and external hard stops. If the force requirement is lower, stepping down to a 63 mm bore reduces per-section push to 1559 N at 0.5 MPa; for higher demands, the 100 mm bore provides 3927 N. For a like-for-like replacement, match the 80 mm bore, both 250 mm strokes, PT port thread, and basic mounting.
With a total travel of 500 mm, ensure the 25 mm rod is adequately guided if significant side loads are present to prevent bending or uneven seal wear.
Multi-position checklist
- ✓ Need 3 repeatable stops?
- ✓ Section strokes 250 + 250 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 SCT80X250X250 FAQ
This model provides 3 distinct mechanical stops because both stroke sections are equal at 250 mm. The rod positions are 0 mm (fully retracted), 250 mm (first section extended), and 500 mm (both sections extended for total travel).
Yes, if your sequence requires a shared rod line to achieve a 250 mm and a 500 mm stop. The SCT tandem cylinder integrates both strokes on a single piston rod, ensuring the two positions are always mechanically synchronized, which is impossible with two independent cylinders.
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