Airtac SCT80~100 Multi-Position Tandem Cylinder SCT80X30X140S
The AirTAC Airtac SCT80~100 Multi-Position Tandem Cylinder SCT80X30X140S is a genuine double-acting MULTI-POSITION (tandem) air cylinder: two piston sections of 30mm and 140mm give 4 controllable stop positions across a 170mm total travel, with a Ø80mm bore, PT3/8 ports and adjustable end cushioning.
- BoreØ80 mm
- Stroke 130 mm
- Stroke 2140 mm
- Total travel170 mm
- Positions4 stops
- Port sizePT3/8
About the Airtac SCT80~100 Multi-Position Tandem Cylinder SCT80X30X140S
The SCT80X30X140S is an 80 mm bore, double-acting tandem cylinder that delivers four fixed rod positions—0 mm, 30 mm, 140 mm, and the total travel of 170 mm—by selectively pressurizing its two piston sections. Each section independently generates 2513 N of push force 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.
A built-in magnet (denoted by the -S suffix) allows direct mounting of CMSG, DMSG, or EMSG sensors along the tie-rod barrel for non-contact position feedback at every stop. The cylinder body has a length of 296 mm and uses a 28 mm adjustable air cushion in each section to decelerate the load quietly at the stroke ends.
Airtac SCT80~100 Multi-Position Tandem Cylinder SCT80X30X140S Technical Specifications
| Model | Airtac SCT80~100 Multi-Position Tandem Cylinder SCT80X30X140S |
|---|---|
| Series | SCT multi-position tie-rod cylinder |
| Bore size | Ø80 mm |
| Stroke 1 / Stroke 2 | 30 / 140 mm |
| Total travel | 170 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) | 30 mm |
| P2 (section 2) | 140 mm |
| P3 (both extended) | 170 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 SCT80X30X140S
| SCT | Multi-position (tandem) tie-rod cylinder series. |
|---|---|
| 80 | Bore size in mm (SCT range 32–100). |
| ×30 | Stroke 1 (section 1) in mm. |
| ×140 | 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 SCT80X30X140S Is Used
Two-Stage Part Diverting
Use the 30 mm stroke for a primary gate and the 140 mm stroke for a secondary divert path, giving three distinct routing positions from one compact actuator.
Multi-Depth Stop-Pin Engagement
Achieve a shallow 30 mm locate, a deep 140 mm lock, and a full 170 mm retract for pallet or fixture positioning in assembly stations.
Staggered Pusher on Conveyors
Push cartons with a 30 mm short stroke for singulation and a 140 mm long stroke for lane transfer, all controlled by the same cylinder unit.
Is the Airtac SCT80~100 Multi-Position Tandem Cylinder SCT80X30X140S the Right Cylinder?
This four-stop actuator replaces complex setups that would otherwise require two separate cylinders and external hard stops to achieve 30 mm, 140 mm, and 170 mm positions. The built-in magnet simplifies sensor integration for sequence control. If your application demands higher force, stepping up to the 100 mm bore provides 3927 N of push per section at the same 0.5 MPa supply pressure. For a drop-in replacement, match the 80 mm bore, both the 30 mm and 140 mm strokes, PT port thread, and the -S magnet option.
Multi-position checklist
- ✓ Need 4 repeatable stops?
- ✓ Section strokes 30 + 140 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 SCT80X30X140S FAQ
This tandem cylinder provides four discrete rod positions: fully retracted (0 mm), first section extended (30 mm), second section extended (140 mm), and both sections extended for the total travel (170 mm). It does not offer infinitely variable positioning.
No, the SCT cylinder does not mechanically lock at any position. If air pressure is exhausted or lost, the piston can drift. To hold a load at a specific stop without live pressure, you must add an external rod brake or a pilot-operated check valve.
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