Airtac SCT80~100 Multi-Position Tandem Cylinder SCT80X50X23
The AirTAC Airtac SCT80~100 Multi-Position Tandem Cylinder SCT80X50X23 is a genuine double-acting MULTI-POSITION (tandem) air cylinder: two piston sections of 50mm and 23mm give 4 controllable stop positions across a 73mm total travel, with a Ø80mm bore, PT3/8 ports and adjustable end cushioning.
- BoreØ80 mm
- Stroke 150 mm
- Stroke 223 mm
- Total travel73 mm
- Positions4 stops
- Port sizePT3/8
About the Airtac SCT80~100 Multi-Position Tandem Cylinder SCT80X50X23
The SCT80X50X23 tandem cylinder provides four fixed rod positions—0 mm, 50 mm, 23 mm, and a combined 73 mm total travel—by pressurising its two piston sections independently. Each 80 mm bore section generates 2513 N of push force at 0.5 MPa, rising to 4523 N at the maximum operating pressure of 0.9 MPa, making it suitable for sorting or diverting tasks that need asymmetric stop points.
Built on a rugged tie-rod design with a 25 mm diameter rod and PT3/8 ports, this cylinder uses an adjustable air cushion (28 mm length) at each end for smooth deceleration. The body length A is 296 mm, and the standard TPU seals suit ambient temperatures from -20 to +70 °C.
Airtac SCT80~100 Multi-Position Tandem Cylinder SCT80X50X23 Technical Specifications
| Model | Airtac SCT80~100 Multi-Position Tandem Cylinder SCT80X50X23 |
|---|---|
| Series | SCT multi-position tie-rod cylinder |
| Bore size | Ø80 mm |
| Stroke 1 / Stroke 2 | 50 / 23 mm |
| Total travel | 73 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) | 23 mm |
| P3 (both extended) | 73 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 SCT80X50X23
| SCT | Multi-position (tandem) tie-rod cylinder series. |
|---|---|
| 80 | Bore size in mm (SCT range 32–100). |
| ×50 | Stroke 1 (section 1) in mm. |
| ×23 | 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 SCT80X50X23 Is Used
Asymmetric Diverter Gate
Uses the 23 mm and 50 mm stops to route packages onto two separate conveyor lanes with different offset distances from a single actuator.
Two-Depth Label Press
Applies labels at a shallow 23 mm depth for one product variant and a deeper 50 mm depth for another, all from one compact tandem cylinder.
Staged Part Ejection
Ejects a finished part to a 23 mm clearing position, then extends further to 73 mm for a secondary sweep, clearing the tooling area in two distinct steps.
Is the Airtac SCT80~100 Multi-Position Tandem Cylinder SCT80X50X23 the Right Cylinder?
Choose the SCT80X50X23 when your process requires two different intermediate positions without the complexity of two separate cylinders and external hard stops. If your load demands higher force, stepping up to the 100 mm bore delivers 3927 N of push per section at 0.5 MPa. For a lighter, more compact solution, the 63 mm bore provides 1559 N.
To replace this unit, match the 80 mm bore, both strokes (50 mm and 23 mm), PT thread, and basic mounting. If either stroke were longer, particularly approaching 300 mm or more, consider adding external guide rods to protect the 25 mm rod from side-load bending.
Multi-position checklist
- ✓ Need 4 repeatable stops?
- ✓ Section strokes 50 + 23 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 SCT80X50X23 FAQ
This tandem cylinder provides four discrete rod positions: fully retracted (0 mm), first section extended (50 mm), second section extended (23 mm), and both sections extended for a total travel of 73 mm. The stops are fixed by the two stroke lengths and are not infinitely adjustable.
The SCT integrates two piston sections on a single common rod, guaranteeing fixed, repeatable intermediate positions without the alignment drift, extra mounting brackets, and complex sequencing valves required by two independent cylinders. It is a simpler, more compact solution for multi-stop linear motion.
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