Airtac SCT80~100 Multi-Position Tandem Cylinder SCT100X100X250S
The AirTAC Airtac SCT80~100 Multi-Position Tandem Cylinder SCT100X100X250S is a genuine double-acting MULTI-POSITION (tandem) air cylinder: two piston sections of 100mm and 250mm give 4 controllable stop positions across a 350mm total travel, with a Ø100mm bore, PT1/2 ports and adjustable end cushioning.
- BoreØ100 mm
- Stroke 1100 mm
- Stroke 2250 mm
- Total travel350 mm
- Positions4 stops
- Port sizePT1/2
About the Airtac SCT80~100 Multi-Position Tandem Cylinder SCT100X100X250S
The SCT100X100X250S is a tandem multi-position cylinder that delivers four fixed rod positions from its two piston sections: 0 mm (fully retracted), 100 mm, 250 mm, and 350 mm (total travel). Each 100 mm bore section generates a substantial 3927 N of push force at 0.5 MPa, making it a powerful choice for heavy-duty material handling tasks that require multiple, repeatable stop points without complex servo controls.
This model includes a factory-installed magnetic piston ring, designated by the 'S' suffix, allowing for direct mounting of CMSG, DMSG, or EMSG sensors on the tie-rod barrel for non-contact position feedback. The cylinder uses a 25 mm diameter piston rod with an M20x1.5 thread, PT1/2 ports, and a 29 mm adjustable air cushion at each end section to manage the high kinetic energy of large loads moving at speeds up to 800 mm/s.
Airtac SCT80~100 Multi-Position Tandem Cylinder SCT100X100X250S Technical Specifications
| Model | Airtac SCT80~100 Multi-Position Tandem Cylinder SCT100X100X250S |
|---|---|
| Series | SCT multi-position tie-rod cylinder |
| Bore size | Ø100 mm |
| Stroke 1 / Stroke 2 | 100 / 250 mm |
| Total travel | 350 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) | 100 mm |
| P2 (section 2) | 250 mm |
| P3 (both extended) | 350 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 SCT100X100X250S
| SCT | Multi-position (tandem) tie-rod cylinder series. |
|---|---|
| 100 | Bore size in mm (SCT range 32–100). |
| ×100 | Stroke 1 (section 1) in mm. |
| ×250 | 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 SCT100X100X250S Is Used
Multi-Stop Pallet Diverter
Actuates a diverter gate on a heavy pallet conveyor to four distinct positions, sorting pallets to different lanes based on a control signal that pressurizes one, the other, or both cylinder sections.
Staged Heavy-Part Clamping
Provides a two-stage clamping sequence for large weldments or castings. The first 100 mm stroke closes the clamp with low force, and the second 250 mm stroke engages a high-force linkage for final part holding.
Two-Depth Pressing Station
Powers a platen to two distinct pressing depths (100 mm and 350 mm) in a single cycle, such as a pre-compression step followed by a final compaction step in a waste baling or composite molding process.
Is the Airtac SCT80~100 Multi-Position Tandem Cylinder SCT100X100X250S the Right Cylinder?
Select the SCT100X100X250S when your application requires four discrete mechanical stops for a heavy payload, eliminating the need to synchronize two separate cylinders or design custom external hard stops. If your force requirement is lower, stepping down to an 80 mm bore SCT reduces the per-section push force to 2513 N at 0.5 MPa, which can significantly lower air consumption. For a direct replacement, match the 100 mm bore, both the 100 mm and 250 mm section strokes, PT port thread, and the integrated magnet (-S suffix).
With the longer 250 mm section stroke, consider the potential for side loading on the 25 mm rod when fully extended. If the load is not guided externally, a guide rod assembly or external linear bearing should be used to prevent rod bending, seal wear, and premature failure.
Multi-position checklist
- ✓ Need 4 repeatable stops?
- ✓ Section strokes 100 + 250 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 SCT100X100X250S FAQ
This tandem cylinder provides four discrete mechanical stop positions along its stroke: 0 mm (fully retracted), 100 mm (first section extended), 250 mm (second section extended), and 350 mm (both sections extended for full travel). The positions are achieved by pressurizing the appropriate combination of the two cylinder sections.
Yes, this is a primary benefit of the SCT series. A single SCT100X100X250S replaces two individual SC100 cylinders (one with 100 mm stroke, one with 250 mm stroke) and their mounting hardware, ensuring perfect axial alignment and a more compact machine footprint. The replacement must match the 100 mm bore, both strokes, PT1/2 ports, and the integrated magnet.
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