Airtac SCT80~100 Multi-Position Tandem Cylinder SCT80X90X280S
The AirTAC Airtac SCT80~100 Multi-Position Tandem Cylinder SCT80X90X280S is a genuine double-acting MULTI-POSITION (tandem) air cylinder: two piston sections of 90mm and 280mm give 4 controllable stop positions across a 370mm total travel, with a Ø80mm bore, PT3/8 ports and adjustable end cushioning.
- BoreØ80 mm
- Stroke 190 mm
- Stroke 2280 mm
- Total travel370 mm
- Positions4 stops
- Port sizePT3/8
About the Airtac SCT80~100 Multi-Position Tandem Cylinder SCT80X90X280S
The SCT80X90X280S is a double-acting multi-position cylinder that delivers four fixed rod positions from a single tie-rod body: 0 mm (fully retracted), 90 mm, 280 mm, and the combined total travel of 370 mm. Each 80 mm bore piston section generates 2513 N of push force at 0.5 MPa, making it a compact alternative to two separate cylinders for sequenced stopping tasks. The built-in magnet allows CMSG, DMSG, or EMSG sensors to clamp directly onto the barrel for non-contact position feedback.
This model uses a 25 mm diameter rod with M20x1.5 male threads and PT3/8 ports. The adjustable pneumatic cushion at each end section is 28 mm long, helping to manage end-of-stroke impact. The body length A(SCT) is 296 mm plus the two stroke lengths. At the maximum operating pressure of 1.0 MPa, the theoretical push force per section reaches 4523 N. The standard TPU seals suit ambient temperatures from -20 to +70 °C.
Airtac SCT80~100 Multi-Position Tandem Cylinder SCT80X90X280S Technical Specifications
| Model | Airtac SCT80~100 Multi-Position Tandem Cylinder SCT80X90X280S |
|---|---|
| Series | SCT multi-position tie-rod cylinder |
| Bore size | Ø80 mm |
| Stroke 1 / Stroke 2 | 90 / 280 mm |
| Total travel | 370 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) | 90 mm |
| P2 (section 2) | 280 mm |
| P3 (both extended) | 370 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 SCT80X90X280S
| SCT | Multi-position (tandem) tie-rod cylinder series. |
|---|---|
| 80 | Bore size in mm (SCT range 32–100). |
| ×90 | Stroke 1 (section 1) in mm. |
| ×280 | 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 SCT80X90X280S Is Used
Four-Position Diverter Gate
Actuates a sorting gate to four distinct positions for routing packages or parts to different conveyor lanes based on size or barcode data.
Multi-Depth Pressing Station
Provides two intermediate pressing depths (90 mm and 280 mm) plus a full-depth position (370 mm) for assembling components with staged insertion forces.
Staged Material Feeding
Advances raw material in three incremental steps (90 mm, 280 mm, 370 mm) into a stamping or cutting die, controlled by sequencing pressure to each cylinder section.
Is the Airtac SCT80~100 Multi-Position Tandem Cylinder SCT80X90X280S the Right Cylinder?
Select the SCT80X90X280S when your application needs four distinct mechanical stops without the complexity of servo control. This tandem unit is more compact and often more cost-effective than installing two individual SC80 cylinders with external hard stops. If your load requires slightly less force, consider stepping down to the 63 mm bore (SCT63), which provides 1559 N of push per section at 0.5 MPa. For a direct replacement, match the 80 mm bore, both strokes (90 mm and 280 mm), the PT3/8 port thread, the built-in magnet (-S), and the basic mounting configuration. With a combined stroke of 370 mm, ensure the rod is adequately guided if significant side loads are present to prevent bending or premature seal wear.
Multi-position checklist
- ✓ Need 4 repeatable stops?
- ✓ Section strokes 90 + 280 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 SCT80X90X280S FAQ
This tandem cylinder provides four discrete mechanical stops: 0 mm (fully retracted), 90 mm (first section extended), 280 mm (second section extended), and 370 mm (both sections extended). The positions are fixed by the two stroke lengths and are not infinitely adjustable.
Yes, it is designed for that purpose. It provides the same sequenced stopping capability in a single, more compact tie-rod body. To be a direct functional replacement, ensure the replacement matches the 80 mm bore, both the 90 mm and 280 mm strokes, the PT3/8 ports, and the built-in magnet (-S suffix) for sensor compatibility.
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