Airtac SCT80~100 Multi-Position Tandem Cylinder SCT100X120X120
The AirTAC Airtac SCT80~100 Multi-Position Tandem Cylinder SCT100X120X120 is a genuine double-acting MULTI-POSITION (tandem) air cylinder: two piston sections of 120mm and 120mm give 3 controllable stop positions across a 240mm total travel, with a Ø100mm bore, PT1/2 ports and adjustable end cushioning.
- BoreØ100 mm
- Stroke 1120 mm
- Stroke 2120 mm
- Total travel240 mm
- Positions3 stops
- Port sizePT1/2
About the Airtac SCT80~100 Multi-Position Tandem Cylinder SCT100X120X120
The AirTAC SCT100X120X120 is a tie-rod multi-position pneumatic cylinder that provides three fixed rod positions: fully retracted (0 mm), 120 mm, and 240 mm total travel. By pressurising either or both of its two 100 mm bore piston sections, you can index the 25 mm diameter rod to these exact mechanical stops without external hard stops or complex servo controls. Each section generates 3927 N of push force at 0.5 MPa, rising to 7068 N at the maximum operating pressure of 0.9 MPa.
This tandem cylinder uses a 29 mm adjustable air cushion at each end to decelerate the load smoothly, and the G1/2 porting ensures high flow for fast cycle times. The body length A(SCT) is 308 mm, providing a compact envelope for the combined stroke. Standard TPU seals and PT threads make this a robust, off-the-shelf solution for repetitive three-position indexing tasks.
Airtac SCT80~100 Multi-Position Tandem Cylinder SCT100X120X120 Technical Specifications
| Model | Airtac SCT80~100 Multi-Position Tandem Cylinder SCT100X120X120 |
|---|---|
| Series | SCT multi-position tie-rod cylinder |
| Bore size | Ø100 mm |
| Stroke 1 / Stroke 2 | 120 / 120 mm |
| Total travel | 240 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.
Stop Positions (3)
| Position | Rod extension |
|---|---|
| P0 (retracted) | 0 mm |
| P1 (section 1) | 120 mm |
| P2 (both extended) | 240 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 SCT100X120X120
| SCT | Multi-position (tandem) tie-rod cylinder series. |
|---|---|
| 100 | Bore size in mm (SCT range 32–100). |
| ×120 | Stroke 1 (section 1) in mm. |
| ×120 | 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 SCT100X120X120 Is Used
3-Way Diverter Gate
Use the three discrete positions (0, 120, 240 mm) to actuate a diverter chute in a conveyor system, reliably routing product to three separate lanes based on the pressurised section.
Two-Stage Clamping
Apply a low-force pre-clamp at the 120 mm position and full clamping force at the 240 mm position by sequencing pressure to the two cylinder sections, protecting delicate assemblies.
Multi-Depth Pressing
Achieve two distinct pressing depths in a single cycle. The rod stops precisely at 120 mm for a shallow form and extends fully to 240 mm for a deep draw, all with one compact actuator.
Is the Airtac SCT80~100 Multi-Position Tandem Cylinder SCT100X120X120 the Right Cylinder?
Select the SCT100X120X120 when your application requires three distinct, repeatable stop positions without the complexity of two separate cylinders and a mounting bracket. This integrated tandem unit simplifies plumbing and guarantees the relative positions of the two strokes. If your force requirement is lower, consider stepping down to the 80 mm bore SCT80X120X120, which provides 2513 N of push per section at 0.5 MPa, reducing air consumption. For a direct replacement, match the 100 mm bore, both 120 mm strokes, PT port thread, and basic mounting configuration. If either stroke exceeds 300 mm, evaluate the rod bearing for side loads and consider an external guide to prevent rod bending.
Multi-position checklist
- ✓ Need 3 repeatable stops?
- ✓ Section strokes 120 + 120 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 SCT100X120X120 FAQ
It provides three distinct mechanical stop positions because both stroke sections are equal at 120 mm. The rod positions are 0 mm (fully retracted), 120 mm (one section extended), and 240 mm (both sections extended, total travel).
Yes, it is a direct replacement for two SC100X120 cylinders that were mechanically coupled to achieve three positions. The SCT100X120X120 integrates both strokes into a single tie-rod body, ensuring perfect alignment and simplifying the pneumatic circuit. Ensure the replacement matches the PT port thread and basic mounting.
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