Airtac SCT80~100 Multi-Position Tandem Cylinder SCT80X35X25S
The AirTAC Airtac SCT80~100 Multi-Position Tandem Cylinder SCT80X35X25S is a genuine double-acting MULTI-POSITION (tandem) air cylinder: two piston sections of 35mm and 25mm give 4 controllable stop positions across a 60mm total travel, with a Ø80mm bore, PT3/8 ports and adjustable end cushioning.
- BoreØ80 mm
- Stroke 135 mm
- Stroke 225 mm
- Total travel60 mm
- Positions4 stops
- Port sizePT3/8
About the Airtac SCT80~100 Multi-Position Tandem Cylinder SCT80X35X25S
The AirTAC SCT80X35X25S is a tandem multi-position cylinder that provides four distinct, repeatable rod positions: fully retracted (0 mm), 25 mm, 35 mm, and the total extended travel of 60 mm. Each of the two piston sections delivers a powerful push force of 2513 N at 0.5 MPa, making it well-suited for compact sorting or diverting tasks requiring three extended stopping points from a single 80 mm bore unit.
This model features a built-in magnet (suffix -S) along the 25 mm diameter rod, allowing direct mounting of CMSG, DMSG, or EMSG sensors for non-contact position confirmation. The tie-rod design incorporates a 28 mm adjustable air cushion in each section for smooth deceleration, and the body has an A(SCT) length of 296 mm, keeping the assembly rigid in multi-stop feeding applications.
Airtac SCT80~100 Multi-Position Tandem Cylinder SCT80X35X25S Technical Specifications
| Model | Airtac SCT80~100 Multi-Position Tandem Cylinder SCT80X35X25S |
|---|---|
| Series | SCT multi-position tie-rod cylinder |
| Bore size | Ø80 mm |
| Stroke 1 / Stroke 2 | 35 / 25 mm |
| Total travel | 60 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) | 35 mm |
| P2 (section 2) | 25 mm |
| P3 (both extended) | 60 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 SCT80X35X25S
| SCT | Multi-position (tandem) tie-rod cylinder series. |
|---|---|
| 80 | Bore size in mm (SCT range 32–100). |
| ×35 | Stroke 1 (section 1) in mm. |
| ×25 | 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 SCT80X35X25S Is Used
Two-Lane Diverter Gate
The 25 mm and 35 mm extensions position a gate to direct parts into two separate lanes, with the 60 mm total travel providing a third bypass position, all from one compact cylinder.
Multi-Depth Stop for Feeders
Actuates a stop pin to two different heights (25 mm and 35 mm) to separate stacked trays or components, using the magnet sensors to verify each discrete position before the next cycle.
Two-Step Pressing or Staking
Drives a tool to an initial 25 mm contact point, then advances to a 35 mm final depth, with the 2513 N per-section force providing ample power for light staking or insertion tasks.
Is the Airtac SCT80~100 Multi-Position Tandem Cylinder SCT80X35X25S the Right Cylinder?
Choose the SCT80X35X25S when a machine design needs three distinct extension points without the complexity of two separate cylinders and external hard stops. The 25 mm and 35 mm strokes create an asymmetrical position set ideal for a two-step ejection or a diverter gate that must clear two different lane heights. For a lighter load, stepping down to a 63 mm bore reduces per-section push to 1559 N at 0.5 MPa.
To replace this unit, match the 80 mm bore, both the 35 mm and 25 mm strokes, PT port thread, and the -S magnet option. The basic mounting style requires no additional brackets, but ensure the guided load is aligned to prevent side-loading on the 25 mm rod. If a position must be held without air pressure, an external rod lock or pilot-operated check valve is necessary, as the multi-position feature does not provide a mechanical brake.
Multi-position checklist
- ✓ Need 4 repeatable stops?
- ✓ Section strokes 35 + 25 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 SCT80X35X25S FAQ
This tandem cylinder provides four discrete rod positions: 0 mm (fully retracted), 25 mm (stroke 2 only), 35 mm (stroke 1 only), and 60 mm (both strokes extended, total travel). The positions are fixed by the two piston sections and are not infinitely adjustable.
Yes, it can replace two individual cylinders and their external hard stops in a space-constrained design. A direct replacement requires an 80 mm bore, 35 mm and 25 mm strokes, PT ports, and the -S magnet option. The per-section push force matches a standard SC80 cylinder, but the unit does not double the force output.
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