Airtac SCT80~100 Multi-Position Tandem Cylinder SCT80X40X35S
The AirTAC Airtac SCT80~100 Multi-Position Tandem Cylinder SCT80X40X35S is a genuine double-acting MULTI-POSITION (tandem) air cylinder: two piston sections of 40mm and 35mm give 4 controllable stop positions across a 75mm total travel, with a Ø80mm bore, PT3/8 ports and adjustable end cushioning.
- BoreØ80 mm
- Stroke 140 mm
- Stroke 235 mm
- Total travel75 mm
- Positions4 stops
- Port sizePT3/8
About the Airtac SCT80~100 Multi-Position Tandem Cylinder SCT80X40X35S
The SCT80X40X35S is an 80 mm bore tandem cylinder that provides four fixed rod positions: 0 mm, 40 mm, 35 mm, and the full 75 mm total travel. Each piston section delivers 2513 N of push force at 0.5 MPa, giving you precise, repeatable stopping points without external hard stops. The built-in magnet allows direct mounting of CMSG/DMSG/EMSG sensors for position feedback.
This model uses a 25 mm diameter rod and PT3/8 ports. The adjustable air cushion at each end is 28 mm long, providing smooth deceleration, while the body length A measures 296 mm. It is a genuine AirTAC tie-rod cylinder, not an ISO 15552 profile, so always verify mounting dimensions against your existing setup.
Airtac SCT80~100 Multi-Position Tandem Cylinder SCT80X40X35S Technical Specifications
| Model | Airtac SCT80~100 Multi-Position Tandem Cylinder SCT80X40X35S |
|---|---|
| Series | SCT multi-position tie-rod cylinder |
| Bore size | Ø80 mm |
| Stroke 1 / Stroke 2 | 40 / 35 mm |
| Total travel | 75 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) | 40 mm |
| P2 (section 2) | 35 mm |
| P3 (both extended) | 75 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 SCT80X40X35S
| SCT | Multi-position (tandem) tie-rod cylinder series. |
|---|---|
| 80 | Bore size in mm (SCT range 32–100). |
| ×40 | Stroke 1 (section 1) in mm. |
| ×35 | 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 SCT80X40X35S Is Used
Sorting Gate Actuation
Uses the 40 mm and 35 mm strokes to shift a diverter gate to two different angled positions for routing packages on a conveyor line.
Two-Stage Clamping
Applies a light 35 mm pre-clamp stroke followed by a full 75 mm power clamp, protecting delicate assemblies from sudden full force.
Multi-Stop Feeding
Advances material in two precise increments of 40 mm and 35 mm, ideal for a stamping press feeder requiring different strip advance lengths.
Is the Airtac SCT80~100 Multi-Position Tandem Cylinder SCT80X40X35S the Right Cylinder?
Selecting this SCT model means you get four distinct stop positions from a single cylinder body, which is cleaner than installing two separate cylinders and external stops. The 80 mm bore provides 2513 N of push per section at 0.5 MPa; if your load is lighter, stepping down to a 63 mm bore (1559 N push) could reduce air consumption. For a direct replacement, match the 80 mm bore, both the 40 mm and 35 mm strokes, PT port thread, and the -S magnet option. Note that both strokes are short, so rod bending is not a primary concern here.
Multi-position checklist
- ✓ Need 4 repeatable stops?
- ✓ Section strokes 40 + 35 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 SCT80X40X35S FAQ
It provides four distinct mechanical stops: 0 mm (fully retracted), 40 mm (first section extended), 35 mm (second section extended), and 75 mm (both sections extended). The unequal strokes give you four unique positions.
Yes, it can often replace a setup using two individual cylinders and external hard stops to achieve three or four positions. Ensure the replacement matches the 80 mm bore, the specific 40 mm and 35 mm strokes, PT ports, and the -S magnet option for sensor compatibility.
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