Airtac SCT80~100 Multi-Position Tandem Cylinder SCT100X250X50S
The AirTAC Airtac SCT80~100 Multi-Position Tandem Cylinder SCT100X250X50S is a genuine double-acting MULTI-POSITION (tandem) air cylinder: two piston sections of 250mm and 50mm give 4 controllable stop positions across a 300mm total travel, with a Ø100mm bore, PT1/2 ports and adjustable end cushioning.
- BoreØ100 mm
- Stroke 1250 mm
- Stroke 250 mm
- Total travel300 mm
- Positions4 stops
- Port sizePT1/2
About the Airtac SCT80~100 Multi-Position Tandem Cylinder SCT100X250X50S
The SCT100X250X50S is a tandem multi-position cylinder that provides four fixed rod positions: 0 mm (fully retracted), 50 mm, 250 mm, and the total travel of 300 mm. Each 100 mm bore section generates a push force of 3927 N at 0.5 MPa, making it a powerful choice for heavy-duty material handling where multiple end-of-stroke locations are required.
A built-in magnet (indicated by the -S suffix) allows direct mounting of CMSG, DMSG, or EMSG sensors along the tie-rod barrel for non-contact position confirmation. The cylinder features a 25 mm diameter piston rod, PT1/2 pneumatic ports, and a 29 mm adjustable air cushion at each end, with a total body length A(SCT) of 308 mm plus strokes.
Airtac SCT80~100 Multi-Position Tandem Cylinder SCT100X250X50S Technical Specifications
| Model | Airtac SCT80~100 Multi-Position Tandem Cylinder SCT100X250X50S |
|---|---|
| Series | SCT multi-position tie-rod cylinder |
| Bore size | Ø100 mm |
| Stroke 1 / Stroke 2 | 250 / 50 mm |
| Total travel | 300 mm |
| Stop positions | 4 positions |
| Acting type | Double acting (tandem, multi-position) |
| Port size | PT1/2 |
| 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, 29 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) | 250 mm |
| P2 (section 2) | 50 mm |
| P3 (both extended) | 300 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 (Ø100mm)
| Pressure | Push force | Pull force |
|---|---|---|
| 0.5 MPa | 3927 N | 3682 N |
| 0.7 MPa | 5498 N | — |
| Max (@1.0 MPa) | 801 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 SCT100X250X50S
| SCT | Multi-position (tandem) tie-rod cylinder series. |
|---|---|
| 100 | Bore size in mm (SCT range 32–100). |
| ×250 | Stroke 1 (section 1) in mm. |
| ×50 | 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 SCT100X250X50S Is Used
Two-Stage Pallet Stop
Use the 50 mm position to decelerate a heavy pallet and the 250 mm position to fully arrest it, providing a controlled two-step stopping sequence on a conveyor line.
Dual-Depth Press Platen
Actuate the 50 mm section for a shallow forming stroke, then pressurize both sections to reach the full 300 mm depth for a secondary deep-draw operation in one cycle.
Sorting Gate with Bypass
Position a diverter gate at 0 mm for lane A, 50 mm for lane B, and 250 mm for lane C, using the 300 mm total extension as a maintenance lockout position.
Is the Airtac SCT80~100 Multi-Position Tandem Cylinder SCT100X250X50S the Right Cylinder?
Select this SCT when a single actuator must stop a heavy load at four distinct points, eliminating the complexity and cost of two separate cylinders with external hard stops. The 250 mm front section stroke and 50 mm rear section stroke create asymmetric positions ideal for a long feed followed by a short precision placement. If your force requirement is lower, stepping down to an 80 mm bore reduces the per-section push to 2513 N at 0.5 MPa.
For replacement, match the 100 mm bore, both strokes (250 mm and 50 mm), PT port thread, and the -S magnet option. Since the front section stroke is 300 mm or more, evaluate the application for side loading; a guide rod or external linear bearing is recommended to protect the rod and seals from bending moments.
Multi-position checklist
- ✓ Need 4 repeatable stops?
- ✓ Section strokes 250 + 50 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 SCT100X250X50S FAQ
This model provides four discrete mechanical stops: 0 mm (fully retracted), 50 mm (rear section extended), 250 mm (front section extended), and 300 mm (both sections extended). The positions are fixed by the two stroke lengths and are not infinitely adjustable.
Yes, if the application requires a 50 mm and a 250 mm stroke on the same rod axis. An SCT100X250X50S with a magnet consolidates the function of two SC100 cylinders into one tie-rod body, reducing mounting hardware and eliminating the need to synchronize two separate actuators.
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