Airtac SCT80~100 Multi-Position Tandem Cylinder SCT80X175X25S
The AirTAC Airtac SCT80~100 Multi-Position Tandem Cylinder SCT80X175X25S is a genuine double-acting MULTI-POSITION (tandem) air cylinder: two piston sections of 175mm and 25mm give 4 controllable stop positions across a 200mm total travel, with a Ø80mm bore, PT3/8 ports and adjustable end cushioning.
- BoreØ80 mm
- Stroke 1175 mm
- Stroke 225 mm
- Total travel200 mm
- Positions4 stops
- Port sizePT3/8
About the Airtac SCT80~100 Multi-Position Tandem Cylinder SCT80X175X25S
The SCT80X175X25S tandem cylinder delivers four fixed rod positions—0 mm, 25 mm, 175 mm, and the combined 200 mm total travel—by pressurizing its two piston sections independently. Each 80 mm bore section generates 2513 N of push force at 0.5 MPa, rising to 4523 N at 0.9 MPa, driven through a rigid 25 mm diameter rod.
A built-in magnet is integrated into the piston, allowing CMSG, DMSG, or EMSG sensors to clamp directly onto the tie-rod barrel for non-contact position sensing. The cylinder body measures 296 mm in its retracted state (A dimension) and uses PT3/8 ports with an adjustable air cushion of 28 mm on each end for smooth deceleration.
Airtac SCT80~100 Multi-Position Tandem Cylinder SCT80X175X25S Technical Specifications
| Model | Airtac SCT80~100 Multi-Position Tandem Cylinder SCT80X175X25S |
|---|---|
| Series | SCT multi-position tie-rod cylinder |
| Bore size | Ø80 mm |
| Stroke 1 / Stroke 2 | 175 / 25 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) | 175 mm |
| P2 (section 2) | 25 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 SCT80X175X25S
| SCT | Multi-position (tandem) tie-rod cylinder series. |
|---|---|
| 80 | Bore size in mm (SCT range 32–100). |
| ×175 | Stroke 1 (section 1) in mm. |
| ×25 | 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 SCT80X175X25S Is Used
Two-Stage Sorting Gate
Use the 25 mm stroke to nudge items onto a primary lane and the 175 mm stroke to divert them fully to a secondary conveyor, all controlled by two solenoid valves.
Dual-Depth Pressing
Achieve a shallow 25 mm pre-form position followed by a full 175 mm pressing depth, with the retracted and 200 mm positions used for part loading and ejection.
Multi-Stop Clamping Fixture
Clamp different workpiece thicknesses by selecting the 25 mm or 175 mm rod extension, while the 200 mm position fully opens the fixture for part changeover.
Is the Airtac SCT80~100 Multi-Position Tandem Cylinder SCT80X175X25S the Right Cylinder?
Choose the SCT80X175X25S when an application needs two widely separated forward positions plus a short intermediate stop, all from one compact actuator. This model replaces two separate cylinders or an SC with external hard stops, simplifying plumbing and control logic. For a lighter load, stepping down to a 63 mm bore provides 1559 N of push per section; for heavier work, the 100 mm bore delivers 3927 N per section at the same 0.5 MPa.
A direct replacement must match the 80 mm bore, both 175 mm and 25 mm strokes, PT3/8 thread, and the built-in magnet. With a combined stroke of 200 mm, rod deflection is minimal, but always align the load axially to prevent side-loading and premature seal wear.
Multi-position checklist
- ✓ Need 4 repeatable stops?
- ✓ Section strokes 175 + 25 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 SCT80X175X25S FAQ
This tandem cylinder provides four discrete mechanical stops: fully retracted (0 mm), the first section extended (25 mm), the second section extended (175 mm), and both sections extended together for the full 200 mm travel.
Yes, the -S suffix indicates a built-in magnetic piston. You can mount CMSG reed switches or DMSG/EMSG solid-state sensors directly on the cylinder's tie rods to detect any of the four positions.
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