Airtac SCT80~100 Multi-Position Tandem Cylinder SCT80X75X700S
The AirTAC Airtac SCT80~100 Multi-Position Tandem Cylinder SCT80X75X700S is a genuine double-acting MULTI-POSITION (tandem) air cylinder: two piston sections of 75mm and 700mm give 4 controllable stop positions across a 775mm total travel, with a Ø80mm bore, PT3/8 ports and adjustable end cushioning.
- BoreØ80 mm
- Stroke 175 mm
- Stroke 2700 mm
- Total travel775 mm
- Positions4 stops
- Port sizePT3/8
About the Airtac SCT80~100 Multi-Position Tandem Cylinder SCT80X75X700S
The SCT80X75X700S is a tandem multi-position pneumatic cylinder that delivers four fixed rod positions: 0 mm (fully retracted), 75 mm, 700 mm, and a total extended travel of 775 mm. Each 80 mm bore 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, driven by a 25 mm diameter piston rod.
This model includes a built-in magnet, allowing direct mounting of CMSG, DMSG, or EMSG sensors on the tie-rod barrel for non-contact position feedback. The second stage's 700 mm stroke is a made-to-order non-standard length, making this unit suitable for applications requiring a short initial advance followed by a long secondary reach. The body length A(SCT) is 296 mm, and the integrated air cushion is 28 mm long per end.
Airtac SCT80~100 Multi-Position Tandem Cylinder SCT80X75X700S Technical Specifications
| Model | Airtac SCT80~100 Multi-Position Tandem Cylinder SCT80X75X700S |
|---|---|
| Series | SCT multi-position tie-rod cylinder |
| Bore size | Ø80 mm |
| Stroke 1 / Stroke 2 | 75 / 700 mm |
| Total travel | 775 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). This configuration exceeds the 500 mm standard section stroke, so it is a non-standard / made-to-order build. 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) | 75 mm |
| P2 (section 2) | 700 mm |
| P3 (both extended) | 775 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 SCT80X75X700S
| SCT | Multi-position (tandem) tie-rod cylinder series. |
|---|---|
| 80 | Bore size in mm (SCT range 32–100). |
| ×75 | Stroke 1 (section 1) in mm. |
| ×700 | 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 SCT80X75X700S Is Used
Two-Stage Part Transfer
A short 75 mm stroke picks a part from a nest, and the long 700 mm stroke transfers it to a distant conveyor. The four discrete positions allow for intermediate tooling clearance.
Multi-Depth Test Probing
Deploy a test probe to a shallow 75 mm sensing position, then extend fully to 775 mm for a deep immersion test, with sensor-confirmed stops at each depth via the built-in magnet.
Sequential Clamping & Feeding
Use the 75 mm position to apply a low-force pre-clamp, and the full 775 mm extension to feed a component into a press. The sensor magnet confirms the part is fully advanced before the cycle continues.
Is the Airtac SCT80~100 Multi-Position Tandem Cylinder SCT80X75X700S the Right Cylinder?
Choose this SCT configuration when your machine needs a short 75 mm positioning step and a much longer 700 mm secondary stroke from a single rod line, avoiding the complexity of two separate cylinders and their mounting hardware. If the 2513 N push force per section at 0.5 MPa is insufficient, stepping up to the SCT100 bore provides 3927 N per section; for a lighter load, the SCT63 bore offers 1559 N. The 700 mm stroke section is non-standard and requires made-to-order lead time. For strokes exceeding 300 mm, particularly the 700 mm section here, ensure the rod is externally guided or the load is centered to prevent side-loading and rod deflection.
Multi-position checklist
- ✓ Need 4 repeatable stops?
- ✓ Section strokes 75 + 700 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 SCT80X75X700S FAQ
This tandem cylinder provides four discrete rod positions: 0 mm (retracted), 75 mm (first section extended), 700 mm (second section extended), and 775 mm (both sections extended for total travel). The positions are fixed by the two stroke lengths and are selected by pressurizing the cylinder's two sections independently or together.
It can replace two single-rod cylinders in applications requiring two fixed stops on the same axis, provided the strokes match 75 mm and 700 mm. A direct replacement must be another AirTAC SCT80X75X700S with a PT port thread, basic mounting, and the -S magnet option to maintain sensor compatibility. The per-section force output is identical to a standard SC80 cylinder.
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