Airtac SCT80~100 Multi-Position Tandem Cylinder SCT100X20X20S
The AirTAC Airtac SCT80~100 Multi-Position Tandem Cylinder SCT100X20X20S is a genuine double-acting MULTI-POSITION (tandem) air cylinder: two piston sections of 20mm and 20mm give 3 controllable stop positions across a 40mm total travel, with a Ø100mm bore, PT1/2 ports and adjustable end cushioning.
- BoreØ100 mm
- Stroke 120 mm
- Stroke 220 mm
- Total travel40 mm
- Positions3 stops
- Port sizePT1/2
About the Airtac SCT80~100 Multi-Position Tandem Cylinder SCT100X20X20S
The SCT100X20X20S is a 100 mm bore multi-position cylinder that delivers three discrete rod stops: 0 mm (fully retracted), 20 mm, and 40 mm total travel. Each piston section generates a substantial 3927 N of push force at 0.5 MPa, rising to 7068 N at the maximum operating pressure of 0.9 MPa, making it suitable for heavy-duty clamping or positioning tasks.
This model includes an integrated magnet (-S suffix), allowing direct mounting of CMSG, DMSG, or EMSG sensors on the tie-rod barrel for contactless position feedback. The cylinder uses a 25 mm diameter rod with M20x1.5 threads and PT1/2 ports, and features a 29 mm adjustable air cushion in each section to decelerate the high-inertia load smoothly.
Airtac SCT80~100 Multi-Position Tandem Cylinder SCT100X20X20S Technical Specifications
| Model | Airtac SCT80~100 Multi-Position Tandem Cylinder SCT100X20X20S |
|---|---|
| Series | SCT multi-position tie-rod cylinder |
| Bore size | Ø100 mm |
| Stroke 1 / Stroke 2 | 20 / 20 mm |
| Total travel | 40 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) | 20 mm |
| P2 (both extended) | 40 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 SCT100X20X20S
| SCT | Multi-position (tandem) tie-rod cylinder series. |
|---|---|
| 100 | Bore size in mm (SCT range 32–100). |
| ×20 | Stroke 1 (section 1) in mm. |
| ×20 | 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 SCT100X20X20S Is Used
Two-Stage Clamping
Use the 20 mm position for a light pre-clamp and the 40 mm position to apply full pressure, preventing damage to delicate assemblies.
Diverter Gate Actuation
Control a three-way chute with the retracted, mid-stroke, and full-stroke positions to sort packages by weight or destination.
Multi-Depth Pressing
Insert a component to a precise 20 mm depth, then advance to 40 mm for a secondary forming operation in a single cycle.
Is the Airtac SCT80~100 Multi-Position Tandem Cylinder SCT100X20X20S the Right Cylinder?
Choose the SCT100X20X20S when your application requires two distinct extended positions plus the home position, all within a compact 40 mm total stroke envelope. If the per-section force is more than needed, stepping down to an 80 mm bore reduces the push force to 2513 N at 0.5 MPa while keeping the same multi-stop functionality. For a direct replacement, match the 100 mm bore, both 20 mm section strokes, the PT port thread, and the integrated magnet; the basic mounting style allows you to reuse your existing custom brackets.
Multi-position checklist
- ✓ Need 3 repeatable stops?
- ✓ Section strokes 20 + 20 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 SCT100X20X20S FAQ
It provides 3 discrete positions because the two section strokes are equal (20 mm each). The rod stops at 0 mm (retracted), 20 mm (one section extended), and 40 mm (both sections extended).
Not directly. The SCT is a tandem cylinder with two piston sections and a longer body length A of 308 mm. It is only a direct replacement for another SCT100X20X20S with matching PT ports and the -S magnet option.
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