Airtac SCT80~100 Multi-Position Tandem Cylinder SCT80X20X23S
The AirTAC Airtac SCT80~100 Multi-Position Tandem Cylinder SCT80X20X23S is a genuine double-acting MULTI-POSITION (tandem) air cylinder: two piston sections of 20mm and 23mm give 4 controllable stop positions across a 43mm total travel, with a Ø80mm bore, PT3/8 ports and adjustable end cushioning.
- BoreØ80 mm
- Stroke 120 mm
- Stroke 223 mm
- Total travel43 mm
- Positions4 stops
- Port sizePT3/8
About the Airtac SCT80~100 Multi-Position Tandem Cylinder SCT80X20X23S
The SCT80X20X23S is a double-acting tandem cylinder that delivers four fixed rod positions—0 mm, 20 mm, 23 mm, and 43 mm—by pressurising its two piston sections independently or together. Each section generates a push force of 2513 N at 0.5 MPa, rising to 4523 N at the maximum operating pressure of 0.9 MPa, driven through a rigid 25 mm diameter rod.
This model includes a built-in magnet, allowing CMSG, DMSG, or EMSG sensors to be clamped directly onto the tie-rod barrel for non-contact position sensing. The cylinder body has an A-length of 296 mm and uses PT3/8 ports with a 28 mm adjustable air cushion at each end, providing smooth deceleration across the 30-800 mm/s speed range.
Airtac SCT80~100 Multi-Position Tandem Cylinder SCT80X20X23S Technical Specifications
| Model | Airtac SCT80~100 Multi-Position Tandem Cylinder SCT80X20X23S |
|---|---|
| Series | SCT multi-position tie-rod cylinder |
| Bore size | Ø80 mm |
| Stroke 1 / Stroke 2 | 20 / 23 mm |
| Total travel | 43 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) | 20 mm |
| P2 (section 2) | 23 mm |
| P3 (both extended) | 43 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 SCT80X20X23S
| SCT | Multi-position (tandem) tie-rod cylinder series. |
|---|---|
| 80 | Bore size in mm (SCT range 32–100). |
| ×20 | 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 SCT80X20X23S Is Used
Two-Stage Precision Gauging
Uses the 20 mm and 23 mm stops for a coarse and fine gauging sequence, bringing a probe to two distinct depths for high/low tolerance checks on a single part.
Compact Diverter Gate
The 43 mm total stroke positions a small diverter blade across three paths, with the intermediate stops at 20 mm and 23 mm acting as precise alignment points for smooth product transfer.
Multi-Level Component Staging
Positions a stop pin at four precise heights (0, 20, 23, 43 mm) to stage different-sized components on an assembly slide, ensuring each part is presented at the correct pick-up height.
Is the Airtac SCT80~100 Multi-Position Tandem Cylinder SCT80X20X23S the Right Cylinder?
Choose the SCT80X20X23S when your application needs four distinct mechanical stops in a compact, self-contained unit, eliminating the complexity of two separate cylinders and external hard stops. For applications requiring higher force per section, stepping up to the 100 mm bore provides 3927 N of push at 0.5 MPa; for a lighter, more compact solution, the 63 mm bore offers 1559 N.
As a direct replacement, match the 80 mm bore, the exact 20 mm and 23 mm strokes, PT port thread, and the built-in magnet (-S suffix). This basic mounting configuration accepts the full SCT accessory range, including FA/FB flanges, CA/CB devises, or LB feet, should your mounting requirements change.
Multi-position checklist
- ✓ Need 4 repeatable stops?
- ✓ Section strokes 20 + 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 SCT80X20X23S FAQ
This cylinder provides four discrete rod positions: fully retracted (0 mm), first section extended (20 mm), second section extended (23 mm), and both sections extended for the total travel of 43 mm. The stops are fixed by the two stroke lengths and are not infinitely adjustable.
The SCT tandem cylinder integrates two piston sections on a single common rod, guaranteeing a fixed spatial relationship between the 20 mm and 23 mm stops. This eliminates the need to synchronise two separate cylinders and their mountings, saving space, reducing plumbing, and ensuring the position sequence is mechanically locked in.
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