Airtac SCT80~100 Multi-Position Tandem Cylinder SCT80X125X150S
The AirTAC Airtac SCT80~100 Multi-Position Tandem Cylinder SCT80X125X150S is a genuine double-acting MULTI-POSITION (tandem) air cylinder: two piston sections of 125mm and 150mm give 4 controllable stop positions across a 275mm total travel, with a Ø80mm bore, PT3/8 ports and adjustable end cushioning.
- BoreØ80 mm
- Stroke 1125 mm
- Stroke 2150 mm
- Total travel275 mm
- Positions4 stops
- Port sizePT3/8
About the Airtac SCT80~100 Multi-Position Tandem Cylinder SCT80X125X150S
The SCT80X125X150S is a double-acting tandem cylinder that provides four fixed rod positions by combining two piston sections on a common rod line. With section strokes of 125 mm and 150 mm, the reachable stops are 0 mm (fully retracted), 125 mm, 150 mm, and the total travel of 275 mm, giving machine designers a simple pneumatic solution for multi-stop feeding or sorting without complex servo controls.
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. The unit features a 25 mm diameter rod, PT3/8 ports, and a 28 mm adjustable air cushion at each end for smooth deceleration. The built-in magnet (denoted by the -S suffix) allows CMSG, DMSG, or EMSG sensors to be mounted directly on the tie-rod barrel for reliable position feedback.
Airtac SCT80~100 Multi-Position Tandem Cylinder SCT80X125X150S Technical Specifications
| Model | Airtac SCT80~100 Multi-Position Tandem Cylinder SCT80X125X150S |
|---|---|
| Series | SCT multi-position tie-rod cylinder |
| Bore size | Ø80 mm |
| Stroke 1 / Stroke 2 | 125 / 150 mm |
| Total travel | 275 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) | 150 mm |
| P3 (both extended) | 275 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 SCT80X125X150S
| SCT | Multi-position (tandem) tie-rod cylinder series. |
|---|---|
| 80 | Bore size in mm (SCT range 32–100). |
| ×125 | Stroke 1 (section 1) in mm. |
| ×150 | 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 SCT80X125X150S Is Used
Three-Gate Part Diverter
Use the four discrete positions (0, 125, 150, 275 mm) to route parts to three separate conveyor lanes. The asymmetric stops allow a compact actuator to replace two cylinders and a linear slide.
Two-Depth Press or Stake
Achieve a shallow pre-press at 125 mm and a full-depth stake at 275 mm from a single actuator. The 4523 N thrust at 0.9 MPa handles medium-force assembly tasks.
Multi-Stop Pallet Indexing
Index a pallet through four stations on a manual or semi-automated line. The 28 mm air cushion at each end protects the 25 mm rod and payload from impact at speeds up to 800 mm/s.
Is the Airtac SCT80~100 Multi-Position Tandem Cylinder SCT80X125X150S the Right Cylinder?
Choose this SCT model when your application needs four distinct stopping points without the cost and complexity of two separate cylinders and external hard stops. The 125 mm and 150 mm strokes create asymmetric positions ideal for two-depth pressing or a three-gate diverter. If your force requirement is lower, stepping down to the 63 mm bore (1559 N push at 0.5 MPa) can reduce air consumption while still providing a 20 mm rod and the same PT1/4 port size.
For a direct replacement, match the 80 mm bore, both stroke lengths (125 mm and 150 mm), PT thread, and the -S magnet option. Since the longer combined travel can increase side-loading on the rod, ensure the external load is guided or use a rod-alignment coupler if the stroke exceeds 300 mm.
Multi-position checklist
- ✓ Need 4 repeatable stops?
- ✓ Section strokes 125 + 150 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 SCT80X125X150S FAQ
This model provides four distinct mechanical stops because the two section strokes are different (125 mm and 150 mm). The rod positions are 0 mm (fully retracted), 125 mm, 150 mm, and the combined total travel of 275 mm. Pressurizing section one, section two, or both selects the stop.
Yes, if your sequence requires fixed stops at 125 mm and 275 mm. The SCT80X125X150S integrates both strokes on a single rod line, eliminating the need to synchronize two cylinders. Ensure the replacement matches the 80 mm bore, PT3/8 ports, and the -S magnet if you are using barrel-mounted sensors.
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