Airtac SCT80~100 Multi-Position Tandem Cylinder SCT80X125X310S
The AirTAC Airtac SCT80~100 Multi-Position Tandem Cylinder SCT80X125X310S is a genuine double-acting MULTI-POSITION (tandem) air cylinder: two piston sections of 125mm and 310mm give 4 controllable stop positions across a 435mm total travel, with a Ø80mm bore, PT3/8 ports and adjustable end cushioning.
- BoreØ80 mm
- Stroke 1125 mm
- Stroke 2310 mm
- Total travel435 mm
- Positions4 stops
- Port sizePT3/8
About the Airtac SCT80~100 Multi-Position Tandem Cylinder SCT80X125X310S
The AirTAC SCT80X125X310S is a double-acting multi-position tandem cylinder that delivers four discrete rod stops: 0 mm, 125 mm, 310 mm, and 435 mm total travel. By independently pressurising its two 80 mm bore sections, you get a compact, repeatable alternative to complex servo setups for fixed-position tasks. Each section generates 2513 N of push force at 0.5 MPa, rising to 4523 N at the 0.9 MPa maximum operating pressure.
This model includes a built-in magnet (-S suffix), allowing CMSG, DMSG, or EMSG reed and solid-state sensors to clamp directly onto the tie-rod barrel for end-of-stroke or mid-position confirmation. The 25 mm diameter piston rod, PT3/8 ports, and 28 mm adjustable air cushion at each end cap ensure smooth deceleration across the 30-800 mm/s speed range. The SCT body length A is 296 mm plus the combined stroke.
Airtac SCT80~100 Multi-Position Tandem Cylinder SCT80X125X310S Technical Specifications
| Model | Airtac SCT80~100 Multi-Position Tandem Cylinder SCT80X125X310S |
|---|---|
| Series | SCT multi-position tie-rod cylinder |
| Bore size | Ø80 mm |
| Stroke 1 / Stroke 2 | 125 / 310 mm |
| Total travel | 435 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) | 125 mm |
| P2 (section 2) | 310 mm |
| P3 (both extended) | 435 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 SCT80X125X310S
| SCT | Multi-position (tandem) tie-rod cylinder series. |
|---|---|
| 80 | Bore size in mm (SCT range 32–100). |
| ×125 | Stroke 1 (section 1) in mm. |
| ×310 | 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 SCT80X125X310S Is Used
Two-Depth Press Insertion
Use the 125 mm stroke for a partial press-fit and the 310 mm stroke for full-depth insertion, with sensors confirming each stage via the built-in magnet.
Multi-Stop Part Diverting
The four positions (0, 125, 310, 435 mm) enable a single actuator to route parts to three different conveyor lanes, simplifying pneumatic control architecture.
Staggered Product Feeding
Advance a pusher bar to 125 mm for the first row and 310 mm for the second row, achieving a two-step feed sequence with one tandem cylinder.
Is the Airtac SCT80~100 Multi-Position Tandem Cylinder SCT80X125X310S the Right Cylinder?
Choose the SCT80 tandem when you need four fixed, mechanical stop positions without the cost of a servo axis. The 125 mm and 310 mm strokes provide a short advance and a longer secondary feed, ideal for two-step pressing or sorting. If your force requirement is lower, the 63 mm bore SCT offers 1559 N push per section at 0.5 MPa; for higher force, step up to the 100 mm bore with 3927 N push per section.
To replace an existing SCT80X125X310S, match the 80 mm bore, both the 125 mm and 310 mm section strokes, the PT port thread, and the integrated magnet. Note that the 310 mm section stroke is long; for horizontal applications, guide the rod externally or support the load to prevent side-loading and premature seal wear.
Multi-position checklist
- ✓ Need 4 repeatable stops?
- ✓ Section strokes 125 + 310 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 SCT80X125X310S FAQ
It provides four discrete mechanical stops: fully retracted (0 mm), the first section extended (125 mm), the second section extended (310 mm), and both sections extended for the total travel of 435 mm. The stops are fixed by the two stroke lengths and are not infinitely adjustable.
The SCT uses its own set of mounting accessories: FA/FB flanges, CA/CB clevises, and LB foot mounts. Standard SC rod-end accessories fit the 25 mm rod, but the barrel mounting is specific to the SCT tandem body. This model has a basic configuration with no bracket included, and it features a built-in magnet for direct sensor mounting.
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