Airtac SCT80~100 Multi-Position Tandem Cylinder SCT100X125X50
The AirTAC Airtac SCT80~100 Multi-Position Tandem Cylinder SCT100X125X50 is a genuine double-acting MULTI-POSITION (tandem) air cylinder: two piston sections of 125mm and 50mm give 4 controllable stop positions across a 175mm total travel, with a Ø100mm bore, PT1/2 ports and adjustable end cushioning.
- BoreØ100 mm
- Stroke 1125 mm
- Stroke 250 mm
- Total travel175 mm
- Positions4 stops
- Port sizePT1/2
About the Airtac SCT80~100 Multi-Position Tandem Cylinder SCT100X125X50
The SCT100X125X50 is a double-acting tandem cylinder that provides four fixed rod positions: fully retracted (0 mm), 50 mm, 125 mm, and the total travel of 175 mm. By pressurizing either of its two piston sections independently or together, you achieve repeatable, discrete stopping points without external hard stops. Each 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.
Built on a robust tie-rod design with a 25 mm diameter rod and an M20x1.5 rod thread, this cylinder has a body length of 308 mm and 29 mm of adjustable air cushion at each end. The standard PT (1/2 inch) ports ensure straightforward pneumatic integration. This model is supplied with a basic mount and TPU seals for a standard operating temperature range of -20 to +70 °C.
Airtac SCT80~100 Multi-Position Tandem Cylinder SCT100X125X50 Technical Specifications
| Model | Airtac SCT80~100 Multi-Position Tandem Cylinder SCT100X125X50 |
|---|---|
| Series | SCT multi-position tie-rod cylinder |
| Bore size | Ø100 mm |
| Stroke 1 / Stroke 2 | 125 / 50 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) | 125 mm |
| P2 (section 2) | 50 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 SCT100X125X50
| SCT | Multi-position (tandem) tie-rod cylinder series. |
|---|---|
| 100 | Bore size in mm (SCT range 32–100). |
| ×125 | Stroke 1 (section 1) in mm. |
| ×50 | 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 SCT100X125X50 Is Used
Two-Depth Pressing
Use the 50 mm stop for a pre-press or locating stage and the full 175 mm travel for the main pressing cycle, ensuring consistent part engagement at two distinct depths.
Part Sorting & Diverting
Control a diverter gate with four positions: home (0 mm), a low-flow bypass (50 mm), a main channel feed (125 mm), and a flush/clean-out position at full 175 mm extension.
Multi-Stop Material Feeding
Advance material in precise increments. The rod moves to 50 mm for a short feed, 125 mm for a standard feed, or 175 mm for a full rapid advance, all from a single actuator.
Is the Airtac SCT80~100 Multi-Position Tandem Cylinder SCT100X125X50 the Right Cylinder?
Choose the SCT100X125X50 when your application requires a long primary stroke with a shorter intermediate stop, such as a two-depth pressing operation. The 175 mm total travel is achieved with a compact, single-rod assembly, saving space compared to two separate cylinders and eliminating the need for complex sequencing logic. For a lighter load, stepping down to an 80 mm bore reduces the per-section push force to 2513 N at 0.5 MPa.
A direct replacement must match the 100 mm bore, both the 125 mm and 50 mm strokes, and the PT port thread. This SCT model is compatible with the full range of SCT mounting accessories, including foot (LB), front and rear flanges (FA/FB), and single or double rear clevises (CA/CB). With a stroke exceeding 100 mm on the first section, ensure the load is guided to prevent side-loading and rod bending.
Multi-position checklist
- ✓ Need 4 repeatable stops?
- ✓ Section strokes 125 + 50 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 SCT100X125X50 FAQ
It provides four discrete mechanical stop positions: 0 mm (fully retracted), 50 mm, 125 mm, and 175 mm (fully extended). These are achieved by pressurizing the two internal piston sections independently or simultaneously. It does not offer infinitely variable positioning.
The force is generated per piston section. At a standard 0.5 MPa air supply, one section produces 3927 N of push force and 3681 N of pull force. At the maximum operating pressure of 0.9 MPa, the push force per section is 7068 N. The forces from the two sections do not add together for a combined output.
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