Airtac SCT80~100 Multi-Position Tandem Cylinder SCT80X700X75S
The AirTAC Airtac SCT80~100 Multi-Position Tandem Cylinder SCT80X700X75S is a genuine double-acting MULTI-POSITION (tandem) air cylinder: two piston sections of 700mm and 75mm give 4 controllable stop positions across a 775mm total travel, with a Ø80mm bore, PT3/8 ports and adjustable end cushioning.
- BoreØ80 mm
- Stroke 1700 mm
- Stroke 275 mm
- Total travel775 mm
- Positions4 stops
- Port sizePT3/8
About the Airtac SCT80~100 Multi-Position Tandem Cylinder SCT80X700X75S
The SCT80X700X75S is a double-acting multi-position cylinder that delivers four fixed rod positions from two independent piston sections on a single axis. With strokes of 700 mm and 75 mm, the reachable stops are 0 mm (fully retracted), 75 mm, 700 mm, and the total travel of 775 mm. This configuration is ideal for applications requiring a long primary advance with a short secondary positioning step, all without the complexity of two separate actuators. The built-in magnet allows direct mounting of CMSG, DMSG, or EMSG sensors for reliable end-of-stroke or mid-position detection.
Each piston section generates 2513 N of push force at 0.5 MPa and up to 4523 N at the 0.9 MPa maximum operating pressure, driven through a 25 mm diameter rod. The cylinder body uses an 80 mm bore with a PT3/8 port and has a total body length A(SCT) of 296 mm plus the combined stroke lengths. The 700 mm section is a non-standard, made-to-order stroke, while the 75 mm section is standard, making this a specialized tandem unit for extended-reach, multi-stop tasks.
Airtac SCT80~100 Multi-Position Tandem Cylinder SCT80X700X75S Technical Specifications
| Model | Airtac SCT80~100 Multi-Position Tandem Cylinder SCT80X700X75S |
|---|---|
| Series | SCT multi-position tie-rod cylinder |
| Bore size | Ø80 mm |
| Stroke 1 / Stroke 2 | 700 / 75 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) | 700 mm |
| P2 (section 2) | 75 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 SCT80X700X75S
| SCT | Multi-position (tandem) tie-rod cylinder series. |
|---|---|
| 80 | Bore size in mm (SCT range 32–100). |
| ×700 | Stroke 1 (section 1) in mm. |
| ×75 | 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 SCT80X700X75S Is Used
Two-Stage Pallet Stop
Use the 75 mm stroke for a low-profile stop and the 700 mm stroke to fully retract the gate, allowing tall pallets to pass on a conveyor line.
Long-Reach Sorting Gate
Divert packages to three lanes: retracted for lane 1, 75 mm for lane 2, and 700 mm or 775 mm to push items fully into lane 3.
Dual-Depth Clamping Fixture
Clamp a family of parts at two widely different depths—75 mm for thin workpieces and 775 mm total travel for deep housings—using one cylinder.
Is the Airtac SCT80~100 Multi-Position Tandem Cylinder SCT80X700X75S the Right Cylinder?
Select the SCT80X700X75S when a single pneumatic axis must reach two distinct extended positions far apart—here a 700 mm primary stroke and a 75 mm fine-positioning stroke—without the alignment headaches of two separate cylinders. Compared to using an SC80 with external hard stops, the SCT provides repeatable, valve-controlled discrete positions that are faster to set up and more compact. 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.
For direct replacement, match the 80 mm bore, both the 700 mm and 75 mm strokes, PT port thread, basic mounting, and the -S magnet option. Because the primary stroke is 700 mm, exceeding 300 mm, the rod is subject to significant side-loading and bending moments. Install external guide rods or a linear rail to prevent rod buckling and ensure long seal life, especially when the load is not perfectly axial.
Multi-position checklist
- ✓ Need 4 repeatable stops?
- ✓ Section strokes 700 + 75 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 SCT80X700X75S FAQ
This tandem cylinder provides 4 distinct mechanical stops because its two strokes (700 mm and 75 mm) are unequal. The rod positions are 0 mm (fully retracted), 75 mm, 700 mm, and the combined total travel of 775 mm. You select the position by pressurizing the first section, the second section, or both simultaneously.
Yes, it is designed to replace two independently mounted cylinders where the rod lines must act on the same point. The SCT80X700X75S puts both strokes on a common rod, eliminating alignment issues. For a drop-in replacement, ensure the replacement unit matches the 80 mm bore, both the 700 mm and 75 mm strokes, PT port thread, basic mounting, and the -S magnet option.
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