Airtac SCT80~100 Multi-Position Tandem Cylinder SCT100X25X50S
The AirTAC Airtac SCT80~100 Multi-Position Tandem Cylinder SCT100X25X50S is a genuine double-acting MULTI-POSITION (tandem) air cylinder: two piston sections of 25mm and 50mm give 4 controllable stop positions across a 75mm total travel, with a Ø100mm bore, PT1/2 ports and adjustable end cushioning.
- BoreØ100 mm
- Stroke 125 mm
- Stroke 250 mm
- Total travel75 mm
- Positions4 stops
- Port sizePT1/2
About the Airtac SCT80~100 Multi-Position Tandem Cylinder SCT100X25X50S
The SCT100X25X50S tandem cylinder provides four discrete rod positions: 0 mm (fully retracted), 25 mm, 50 mm, and 75 mm (total travel). Each piston section delivers a powerful 3927 N of push force at 0.5 MPa, scaling to 7068 N at the maximum operating pressure of 0.9 MPa, driven through a rigid 25 mm diameter rod.
A built-in magnet is integrated into the piston, allowing standard CMSG, DMSG, or EMSG sensors to clamp directly onto the tie-rod barrel for non-contact position sensing. The cylinder body has a length of 308 mm and uses PT1/2 ports, making it a compact solution for multi-stop material handling where electronic feedback is required.
Airtac SCT80~100 Multi-Position Tandem Cylinder SCT100X25X50S Technical Specifications
| Model | Airtac SCT80~100 Multi-Position Tandem Cylinder SCT100X25X50S |
|---|---|
| Series | SCT multi-position tie-rod cylinder |
| Bore size | Ø100 mm |
| Stroke 1 / Stroke 2 | 25 / 50 mm |
| Total travel | 75 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) | 25 mm |
| P2 (section 2) | 50 mm |
| P3 (both extended) | 75 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 SCT100X25X50S
| SCT | Multi-position (tandem) tie-rod cylinder series. |
|---|---|
| 100 | Bore size in mm (SCT range 32–100). |
| ×25 | 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 SCT100X25X50S Is Used
Two-Stage Diverter Gate
Extends to 25 mm for a partial divert and 75 mm for a full divert on a conveyor line, with sensor confirmation at each stop via the built-in magnet.
Sequential Part Rejection
Uses the 25 mm stroke for a minor reject bin and the 75 mm total stroke for a major scrap chute, simplifying pneumatic logic with one cylinder.
Dual-Depth Pressing
Provides a 50 mm pre-press position and a 75 mm final press depth, with the magnet confirming the cylinder has reached the full mechanical stop.
Is the Airtac SCT80~100 Multi-Position Tandem Cylinder SCT100X25X50S the Right Cylinder?
This 4-position model is ideal when a process needs two independent extend distances from a single actuator, such as a two-stage pusher. If a higher force per section is needed, the next step up in bore is not available for the SCT series, as 100 mm is the maximum; consider reducing the load or increasing the operating pressure. For replacement, match the bore, both strokes (25 and 50 mm), the PT port thread, and the -S magnet option. With a combined travel of 75 mm, rod bending is not a primary concern, but ensure the load is guided if it is offset from the rod axis.
Multi-position checklist
- ✓ Need 4 repeatable stops?
- ✓ Section strokes 25 + 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 SCT100X25X50S FAQ
It provides four distinct mechanical stop positions: 0 mm (retracted), 25 mm, 50 mm, and 75 mm (full extension of both sections). The positions are achieved by pressurizing the first section, the second section, or both simultaneously.
Yes, the -S suffix indicates a built-in magnet, making it directly compatible with AirTAC CMSG, DMSG, and EMSG series reed and solid-state sensors. These sensors mount externally on the cylinder's tie-rods to detect the piston position without any additional brackets.
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