
The AirTAC Airtac SCT80~100 Multi-Position Tandem Cylinder SCT100X165X165S is a genuine double-acting MULTI-POSITION (tandem) air cylinder: two piston sections of 165mm and 165mm give 3 controllable stop positions across a 330mm total travel, with a Ø100mm bore, PT1/2 ports and adjustable end cushioning.
The SCT100X165X165S is a double-acting multi-position cylinder that provides three fixed rod positions: fully retracted (0 mm), 165 mm, and full extension at 330 mm. Each piston section generates a push force of 3927 N at 0.5 MPa, scaling up to a powerful 7068 N at the maximum operating pressure of 0.9 MPa, driven by a 25 mm diameter rod.
This model includes an integrated magnet, allowing CMSG, DMSG, or EMSG sensors to be clamped directly onto the tie-rod barrel for reliable end-of-stroke or intermediate position sensing. With a body length of 308 mm and a generous 29 mm adjustable air cushion, it is built to handle substantial inertial loads in sorting and diverting applications.
| Model | Airtac SCT80~100 Multi-Position Tandem Cylinder SCT100X165X165S |
|---|---|
| Series | SCT multi-position tie-rod cylinder |
| Bore size | Ø100 mm |
| Stroke 1 / Stroke 2 | 165 / 165 mm |
| Total travel | 330 mm |
| Stop positions | 3 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.
| Position | Rod extension |
|---|---|
| P0 (retracted) | 0 mm |
| P1 (section 1) | 165 mm |
| P2 (both extended) | 330 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.
| 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.
| SCT | Multi-position (tandem) tie-rod cylinder series. |
|---|---|
| 100 | Bore size in mm (SCT range 32–100). |
| ×165 | Stroke 1 (section 1) in mm. |
| ×165 | 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.
Uses the three distinct stops (0, 165, 330 mm) to divert packages or components onto three separate conveyor lanes, controlled simply by pressurising one or both cylinder sections.
Performs a two-stage pressing operation: a partial press at 165 mm for pre-forming, followed by a full-depth press at 330 mm, all within a single compact actuator package.
Advances material strips or components in precise 165 mm increments. The built-in magnet allows sensors to confirm each stop position, ensuring accurate feed length for automated assembly.
This 100 mm bore tandem cylinder is a compact alternative to mounting two separate SC100 cylinders back-to-back, eliminating the need for complex alignment and reducing the machine footprint. If your application requires a higher force density, consider the 80 mm bore SCT80 which delivers 2513 N of push per section at 0.5 MPa. For replacement, ensure you match the100 mm bore, both 165 mm strokes, PT port thread, basic mounting, and the -S magnet option.
Given the 330 mm total extension, evaluate the side load on the 25 mm rod. For long-stroke applications with significant radial forces, an external guide rail or rod support is recommended to prevent bending and ensure seal longevity.
Multi-position checklist
This model has 3 distinct mechanical stop positions because both stroke sections are equal at 165 mm. The rod positions are 0 mm (fully retracted), 165 mm (one section extended), and 330 mm (both sections extended, total travel).
Each of the two piston sections independently provides 3927 N of push force and 3681 N of pull force when operated at 0.5 MPa. At the maximum operating pressure of1.0 MPa, the theoretical push force per section is 7854 N. The forces do not add together for a combined output.
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