Airtac SCT80~100 Multi-Position Tandem Cylinder SCT80X50X50S
The AirTAC Airtac SCT80~100 Multi-Position Tandem Cylinder SCT80X50X50S is a genuine double-acting MULTI-POSITION (tandem) air cylinder: two piston sections of 50mm and 50mm give 3 controllable stop positions across a 100mm total travel, with a Ø80mm bore, PT3/8 ports and adjustable end cushioning.
- BoreØ80 mm
- Stroke 150 mm
- Stroke 250 mm
- Total travel100 mm
- Positions3 stops
- Port sizePT3/8
About the Airtac SCT80~100 Multi-Position Tandem Cylinder SCT80X50X50S
The SCT80X50X50S is an 80 mm bore tandem multi-position cylinder that delivers three fixed rod stops: fully retracted (0 mm), mid-stroke (50 mm), and full extension (100 mm). Each piston section generates 2513 N of push force at 0.5 MPa, rising to 4523 N at the maximum 0.9 MPa operating pressure, driven through a 25 mm diameter rod with PT3/8 ports.
A built-in magnet (the -S suffix) allows CMSG, DMSG, or EMSG solid-state and reed sensors to clamp directly onto the tie-rod barrel for non-contact position confirmation at each stop. The cylinder body measures 296 mm in the A dimension and uses a 28 mm adjustable air cushion on each section for controlled end-of-stroke deceleration.
Airtac SCT80~100 Multi-Position Tandem Cylinder SCT80X50X50S Technical Specifications
| Model | Airtac SCT80~100 Multi-Position Tandem Cylinder SCT80X50X50S |
|---|---|
| Series | SCT multi-position tie-rod cylinder |
| Bore size | Ø80 mm |
| Stroke 1 / Stroke 2 | 50 / 50 mm |
| Total travel | 100 mm |
| Stop positions | 3 positions |
| Acting type | Double acting (tandem, multi-position) |
| Port size | PT3/8 |
| 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, 28 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) | 50 mm |
| P2 (both extended) | 100 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 (Ø80mm)
| Pressure | Push force | Pull force |
|---|---|---|
| 0.5 MPa | 2513 N | 2268 N |
| 0.7 MPa | 3519 N | — |
| Max (@1.0 MPa) | 513 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 SCT80X50X50S
| SCT | Multi-position (tandem) tie-rod cylinder series. |
|---|---|
| 80 | Bore size in mm (SCT range 32–100). |
| ×50 | 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 SCT80X50X50S Is Used
3-Position Diverter Gate
The three stops (0, 50, 100 mm) route packages or parts to separate conveyor lanes, with the integrated magnet confirming gate position at each lane entry.
Two-Stage Clamping Fixture
Provides a partial clamp at 50 mm stroke for alignment and a full-power clamp at 100 mm, using the same cylinder to reduce fixture complexity.
Multi-Depth Pressing
Delivers two distinct pressing depths in one cycle, with sensor feedback from the -S magnet ensuring the correct depth is reached before the next operation.
Is the Airtac SCT80~100 Multi-Position Tandem Cylinder SCT80X50X50S the Right Cylinder?
This 3-position unit replaces setups that would otherwise need two separate 80 mm bore cylinders and external hard stops to achieve a mid-position. When sizing, if 2513 N of push per section at 0.5 MPa is insufficient, stepping up to the 100 mm bore (3927 N push at 0.5 MPa) provides more force without changing the tandem concept. A direct replacement must match the 80 mm bore, both 50 mm strokes, PT thread, basic mounting, and the -S magnet; the SCT80X50X50S is a drop-in swap for an identical AirTAC part number.
Multi-position checklist
- ✓ Need 3 repeatable stops?
- ✓ Section strokes 50 + 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 SCT80X50X50S FAQ
It provides 3 discrete mechanical stops because the two 50 mm strokes are equal. The rod positions are 0 mm (fully retracted), 50 mm (first section extended), and 100 mm (both sections extended, total travel).
Yes, if your application needs a fixed mid-stop at 50 mm and full extension at 100 mm. The SCT80X50X50S achieves this with one cylinder body and one rod line, saving space and eliminating the need to synchronise two separate actuators. Ensure the per-section force (2513 N push at 0.5 MPa) meets your load requirement.
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