Airtac SCT80~100 Multi-Position Tandem Cylinder SCT80X50X55S
The AirTAC Airtac SCT80~100 Multi-Position Tandem Cylinder SCT80X50X55S is a genuine double-acting MULTI-POSITION (tandem) air cylinder: two piston sections of 50mm and 55mm give 4 controllable stop positions across a 105mm total travel, with a Ø80mm bore, PT3/8 ports and adjustable end cushioning.
- BoreØ80 mm
- Stroke 150 mm
- Stroke 255 mm
- Total travel105 mm
- Positions4 stops
- Port sizePT3/8
About the Airtac SCT80~100 Multi-Position Tandem Cylinder SCT80X50X55S
The SCT80X50X55S is an 80 mm bore multi-position tandem cylinder delivering four discrete rod positions: 0 mm (fully retracted), 50 mm, 55 mm, and 105 mm total travel. Each piston section provides a push force of 2513 N at 0.5 MPa, making it a robust choice for sorting or diverting tasks requiring two distinct intermediate stops without complex controls.
This model includes a built-in magnet (-S suffix), allowing direct mounting of CMSG, DMSG, or EMSG sensors on the tie-rod barrel for non-contact position feedback. The cylinder features a 25 mm diameter rod, PT3/8 ports, an M20x1.5 rod thread, and a 28 mm adjustable air cushion for smooth deceleration. Its body length A(SCT) is 296 mm.
Airtac SCT80~100 Multi-Position Tandem Cylinder SCT80X50X55S Technical Specifications
| Model | Airtac SCT80~100 Multi-Position Tandem Cylinder SCT80X50X55S |
|---|---|
| Series | SCT multi-position tie-rod cylinder |
| Bore size | Ø80 mm |
| Stroke 1 / Stroke 2 | 50 / 55 mm |
| Total travel | 105 mm |
| Stop positions | 4 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 (4)
| Position | Rod extension |
|---|---|
| P0 (retracted) | 0 mm |
| P1 (section 1) | 50 mm |
| P2 (section 2) | 55 mm |
| P3 (both extended) | 105 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 SCT80X50X55S
| SCT | Multi-position (tandem) tie-rod cylinder series. |
|---|---|
| 80 | Bore size in mm (SCT range 32–100). |
| ×50 | Stroke 1 (section 1) in mm. |
| ×55 | 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 SCT80X50X55S Is Used
Two-Stage Diverter Gate
Operates a conveyor diverter with three distinct flow paths: retracted for lane one, extending to 50 mm for lane two, and extending to 55 mm for lane three, using the 105 mm full extension as a purge or bypass position.
Multi-Level Part Staging
Positions a stop pin at two different heights (50 mm and 55 mm) to separate tall and short components on an assembly line, with the retracted and fully extended positions used for pass-through and lockout modes.
Dual-Depth Pressing Station
Provides two controlled pressing depths in a light assembly fixture. The 50 mm stroke sets a pre-compression depth, while the 55 mm stroke applies final seating force, with magnetic sensors confirming each stage.
Is the Airtac SCT80~100 Multi-Position Tandem Cylinder SCT80X50X55S the Right Cylinder?
Choose this 4-position SCT when a single actuator must stop at two different mid-stroke locations, replacing a pair of cylinders and external hard stops with a simpler, more compact tandem unit. For applications needing more force, stepping up to the 100 mm bore SCT provides 3927 N of push per section at 0.5 MPa. If a lighter load is present, the 63 mm bore SCT offers 1559 N.
As a direct replacement, match the 80 mm bore, both the 50 mm and 55 mm section strokes, PT port thread, and the built-in magnet (-S). This basic mounting version has no attached brackets; select FA or FB flanges for end-face mounting, or LB feet for base mounting if required. For strokes over 300 mm, consider external guides to protect the 25 mm rod from side loads.
Multi-position checklist
- ✓ Need 4 repeatable stops?
- ✓ Section strokes 50 + 55 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 SCT80X50X55S FAQ
This tandem cylinder provides four discrete rod positions: 0 mm (retracted), 50 mm (first section extended), 55 mm (second section extended), and 105 mm (both sections extended). The stops are fixed by the two stroke lengths and are not infinitely adjustable.
A standard single-stroke SC80 cylinder cannot replicate the multi-position function. You must use an SCT80 tandem cylinder with matching 50 mm and 55 mm section strokes. Also ensure the replacement has the same PT port thread and the -S magnet option if your application uses barrel-mounted sensors.
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