Airtac SCT80~100 Multi-Position Tandem Cylinder SCT80X300X25S
The AirTAC Airtac SCT80~100 Multi-Position Tandem Cylinder SCT80X300X25S is a genuine double-acting MULTI-POSITION (tandem) air cylinder: two piston sections of 300mm and 25mm give 4 controllable stop positions across a 325mm total travel, with a Ø80mm bore, PT3/8 ports and adjustable end cushioning.
- BoreØ80 mm
- Stroke 1300 mm
- Stroke 225 mm
- Total travel325 mm
- Positions4 stops
- Port sizePT3/8
About the Airtac SCT80~100 Multi-Position Tandem Cylinder SCT80X300X25S
The SCT80X300X25S is a tandem double-acting pneumatic cylinder that delivers four discrete rod positions—0 mm, 25 mm, 300 mm, and the combined total travel of 325 mm—by pressurizing its two piston sections independently or together. Each section generates a push force of 2513 N at 0.5 MPa, rising to 4523 N at 0.9 MPa, driven through a 25 mm diameter piston rod with PT3/8 ports.
This model includes a factory-installed magnetic piston (suffix -S), allowing direct mounting of CMSG, DMSG, or EMSG sensors on the tie-rod barrel for non-contact position feedback at each stop. The 28 mm air cushion at each end of the 296 mm body length (A dimension) provides adjustable deceleration, making it suitable for high-cycle multi-stop transfer tasks where intermediate positions must be confirmed by a sensor signal.
Airtac SCT80~100 Multi-Position Tandem Cylinder SCT80X300X25S Technical Specifications
| Model | Airtac SCT80~100 Multi-Position Tandem Cylinder SCT80X300X25S |
|---|---|
| Series | SCT multi-position tie-rod cylinder |
| Bore size | Ø80 mm |
| Stroke 1 / Stroke 2 | 300 / 25 mm |
| Total travel | 325 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) | 300 mm |
| P2 (section 2) | 25 mm |
| P3 (both extended) | 325 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 SCT80X300X25S
| SCT | Multi-position (tandem) tie-rod cylinder series. |
|---|---|
| 80 | Bore size in mm (SCT range 32–100). |
| ×300 | 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 SCT80X300X25S Is Used
Two-Stage Part Diverting
Extend to 25 mm for a low-profile diverter gate and to 300 mm for a full-reach pusher, sorting packages onto two separate conveyor lanes from one actuator.
Dual-Depth Clamping
Use the 25 mm stop for a light locating clamp on thin workpieces and the 300 mm position for a deep-set clamping jaw on larger components, with sensor confirmation at each depth.
Sequential Ejector Mechanism
The 25 mm stroke ejects a small part from a nest, while the full 300 mm stroke clears a larger finished assembly, all from one compact tandem cylinder with magnetic position sensing.
Is the Airtac SCT80~100 Multi-Position Tandem Cylinder SCT80X300X25S the Right Cylinder?
Choose the SCT80X300X25S when your application requires a long primary stroke of 300 mm and a short secondary stop at 25 mm, eliminating the complexity and cost of two separate cylinders with external hard stops. If the 2513 N per-section push force at 0.5 MPa is more than needed, stepping down to a 63 mm bore provides 1559 N per section; if you need higher force, the 100 mm bore delivers 3927 N per section at the same pressure.
For a direct replacement, match the 80 mm bore, both strokes (300 mm and 25 mm), PT port threads, and the integrated magnet (-S). With the 300 mm section stroke, ensure the rod is externally guided if significant side loads are present to prevent rod bending or uneven seal wear over the extended travel.
Multi-position checklist
- ✓ Need 4 repeatable stops?
- ✓ Section strokes 300 + 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 SCT80X300X25S FAQ
This 4-position cylinder stops at 0 mm (fully retracted), 25 mm (section 2 extended), 300 mm (section 1 extended), and 325 mm (both sections extended, total travel). The built-in magnet allows sensors to detect the piston at each of these discrete locations.
Yes, if you need fixed stops at 25 mm and 300 mm. A single SCT80X300X25S with a magnet replaces two SC80 cylinders, two mounting brackets, and external stop collars. Ensure the replacement matches the 80 mm bore, both strokes, PT ports, and the -S magnet option.
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