Airtac SCT80~100 Multi-Position Tandem Cylinder SCT80X25X175S
The AirTAC Airtac SCT80~100 Multi-Position Tandem Cylinder SCT80X25X175S is a genuine double-acting MULTI-POSITION (tandem) air cylinder: two piston sections of 25mm and 175mm give 4 controllable stop positions across a 200mm total travel, with a Ø80mm bore, PT3/8 ports and adjustable end cushioning.
- BoreØ80 mm
- Stroke 125 mm
- Stroke 2175 mm
- Total travel200 mm
- Positions4 stops
- Port sizePT3/8
About the Airtac SCT80~100 Multi-Position Tandem Cylinder SCT80X25X175S
The SCT80X25X175S is a tie-rod multi-position pneumatic cylinder that delivers four fixed rod positions from its tandem piston design: 0 mm, 25 mm, 175 mm, and the full combined travel of 200 mm. Each actuated section generates a push force of 2513 N at 0.5 MPa, driven through a substantial 25 mm diameter rod, making it suitable for tasks requiring distinct short and intermediate stop points in one compact unit.
This model includes a built-in magnet, allowing direct mounting of CMSG, DMSG, or EMSG sensors along the barrel for reliable, non-contact position feedback at every stop. The cylinder body has a base length of 296 mm and uses PT3/8 ports, with an adjustable air cushion of 28 mm at each end to manage deceleration across the different stroke segments.
Airtac SCT80~100 Multi-Position Tandem Cylinder SCT80X25X175S Technical Specifications
| Model | Airtac SCT80~100 Multi-Position Tandem Cylinder SCT80X25X175S |
|---|---|
| Series | SCT multi-position tie-rod cylinder |
| Bore size | Ø80 mm |
| Stroke 1 / Stroke 2 | 25 / 175 mm |
| Total travel | 200 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) | 175 mm |
| P3 (both extended) | 200 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 SCT80X25X175S
| SCT | Multi-position (tandem) tie-rod cylinder series. |
|---|---|
| 80 | Bore size in mm (SCT range 32–100). |
| ×25 | Stroke 1 (section 1) in mm. |
| ×175 | 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 SCT80X25X175S Is Used
Two-Stage Clamping
A 25 mm low-force positioning stroke to gently contact a workpiece, followed by a 175 mm high-force clamping stroke, with sensor confirmation at each stage.
Diverter Gate Actuation
Controls a three-way chute gate with positions at 0 mm (closed), 25 mm (partial divert), and 200 mm (full divert), using the intermediate 175 mm stop for a secondary flow path.
Multi-Stop Pusher
Pushes products off a conveyor at two different lane depths: a 25 mm stroke for the first lane and a 200 mm total stroke to reach the second, with sensor-verified positioning.
Is the Airtac SCT80~100 Multi-Position Tandem Cylinder SCT80X25X175S the Right Cylinder?
Selecting this SCT configuration replaces the need for two separate single-stroke cylinders or an actuator with complex external hard stops when a process calls for a short 25 mm advance and a longer 175 mm movement. If the 2513 N push force per section is more than required, stepping down to the 63 mm bore reduces it to 1559 N, while still providing the same multi-stop functionality. For replacement, ensure the match is exact: an AirTAC SCT80 with 25 mm and 175 mm strokes, PT3/8 threads, and the -S magnet option. The 175 mm stroke section may require external guiding if the rod is subjected to significant side loads.
Multi-position checklist
- ✓ Need 4 repeatable stops?
- ✓ Section strokes 25 + 175 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 SCT80X25X175S FAQ
This tandem cylinder provides four discrete rod positions: fully retracted (0 mm), extended to the first section stop (25 mm), extended to the second section stop (175 mm), and fully extended at the total travel (200 mm).
It integrates two strokes into a single tie-rod body, saving space and simplifying plumbing. You get four fixed positions from one unit instead of sequencing two separate actuators, and the built-in magnet allows one set of sensors to track all stops.
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