Airtac SCT80~100 Multi-Position Tandem Cylinder SCT100X75X100S
The AirTAC Airtac SCT80~100 Multi-Position Tandem Cylinder SCT100X75X100S is a genuine double-acting MULTI-POSITION (tandem) air cylinder: two piston sections of 75mm and 100mm give 4 controllable stop positions across a 175mm total travel, with a Ø100mm bore, PT1/2 ports and adjustable end cushioning.
- BoreØ100 mm
- Stroke 175 mm
- Stroke 2100 mm
- Total travel175 mm
- Positions4 stops
- Port sizePT1/2
About the Airtac SCT80~100 Multi-Position Tandem Cylinder SCT100X75X100S
The SCT100X75X100S is a double-acting tandem cylinder that delivers four fixed rod positions from two independent strokes on a single piston rod. With a 100 mm bore and unequal section strokes of 75 mm and 100 mm, the rod can be precisely located at 0 mm (fully retracted), 75 mm, 100 mm, or the full combined travel of 175 mm by pressurising the appropriate air ports.
Each piston section generates a push force of 3927 N at 0.5 MPa, rising to 7068 N at the maximum operating pressure of 0.9 MPa. The unit is built with a robust 25 mm diameter rod, PT1/2 ports, and a 29 mm adjustable air cushion at each end for smooth deceleration. A built-in magnet (denoted by the -S suffix) allows direct mounting of CMSG, DMSG, or EMSG sensors on the tie-rod barrel for contactless position feedback.
Airtac SCT80~100 Multi-Position Tandem Cylinder SCT100X75X100S Technical Specifications
| Model | Airtac SCT80~100 Multi-Position Tandem Cylinder SCT100X75X100S |
|---|---|
| Series | SCT multi-position tie-rod cylinder |
| Bore size | Ø100 mm |
| Stroke 1 / Stroke 2 | 75 / 100 mm |
| Total travel | 175 mm |
| Stop positions | 4 positions |
| Acting type | Double acting (tandem, multi-position) |
| Port size | PT1/2 |
| 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, 29 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) | 75 mm |
| P2 (section 2) | 100 mm |
| P3 (both extended) | 175 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 (Ø100mm)
| Pressure | Push force | Pull force |
|---|---|---|
| 0.5 MPa | 3927 N | 3682 N |
| 0.7 MPa | 5498 N | — |
| Max (@1.0 MPa) | 801 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 SCT100X75X100S
| SCT | Multi-position (tandem) tie-rod cylinder series. |
|---|---|
| 100 | Bore size in mm (SCT range 32–100). |
| ×75 | Stroke 1 (section 1) in mm. |
| ×100 | 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 SCT100X75X100S Is Used
Four-Way Diverter Gate
Index a heavy conveyor diverter plate to four fixed positions (0, 75, 100, 175 mm) to route packages to four separate lanes using a single actuator.
Multi-Depth Pressing
Control a platen to two distinct pressing depths (75 mm and 175 mm) plus a partial retract position (100 mm) for clearing parts, all with repeatable hard stops.
Staged Clamping Fixture
Operate a welding fixture clamp that moves to a low-force pre-clamp position at 100 mm stroke before applying full clamping force at the combined 175 mm stroke.
Is the Airtac SCT80~100 Multi-Position Tandem Cylinder SCT100X75X100S the Right Cylinder?
Choose the SCT tandem cylinder when your application requires a single, compact actuator to index between four distinct mechanical stops, eliminating the complexity and air plumbing of two separate cylinders with external hard stops. The 100 mm bore provides substantial thrust—3927 N push per section at standard shop air—for heavy sorting gates or multi-depth pressing tools. If your load is lighter, stepping down to an 80 mm bore reduces push force to 2513 N per section at 0.5 MPa, saving air consumption. For a direct replacement, match the 100 mm bore, both strokes (75 mm and 100 mm), PT port thread, basic mounting, and the integrated magnet (-S) to ensure sensor compatibility.
Multi-position checklist
- ✓ Need 4 repeatable stops?
- ✓ Section strokes 75 + 100 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 SCT100X75X100S FAQ
This cylinder provides four discrete mechanical stop positions: 0 mm (fully retracted), 75 mm (first section extended), 100 mm (second section extended), and 175 mm (both sections extended). The positions are fixed by the two stroke lengths and are not infinitely adjustable.
Yes, the SCT100X75X100S is designed to replace two individual cylinders and their mounting hardware for multi-stop tasks. It provides the same functionality in a single, pre-aligned package, simplifying air circuit design. Ensure the replacement matches the 100 mm bore, 75 mm and 100 mm strokes, PT ports, and the -S magnet option for sensor feedback.
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