Airtac SCT80~100 Multi-Position Tandem Cylinder SCT100X125X75
The AirTAC Airtac SCT80~100 Multi-Position Tandem Cylinder SCT100X125X75 is a genuine double-acting MULTI-POSITION (tandem) air cylinder: two piston sections of 125mm and 75mm give 4 controllable stop positions across a 200mm total travel, with a Ø100mm bore, PT1/2 ports and adjustable end cushioning.
- BoreØ100 mm
- Stroke 1125 mm
- Stroke 275 mm
- Total travel200 mm
- Positions4 stops
- Port sizePT1/2
About the Airtac SCT80~100 Multi-Position Tandem Cylinder SCT100X125X75
The SCT100X125X75 is a tandem multi-position pneumatic cylinder that provides four distinct, repeatable rod positions without external stops. By pressurising the two 100 mm bore sections individually or together, the rod locates precisely at 0 mm (fully retracted), 75 mm, 125 mm, and the total extended travel of 200 mm. Each actuated piston section delivers a substantial push force of 3927 N at 0.5 MPa, making it suitable for heavy-duty material handling and sorting tasks.
Built on a robust tie-rod construction with a 25 mm diameter piston rod and PT1/2 ports, this cylinder includes an adjustable pneumatic cushion (29 mm length) at both ends for reliable end-of-stroke deceleration. The body length A is 308 mm plus the combined stroke. With an operating pressure range of 0.15–1.0 MPa and a maximum push thrust of 7068 N per section at 0.9 MPa, it handles demanding multi-stop actuation where consistent positioning under load is critical.
Airtac SCT80~100 Multi-Position Tandem Cylinder SCT100X125X75 Technical Specifications
| Model | Airtac SCT80~100 Multi-Position Tandem Cylinder SCT100X125X75 |
|---|---|
| Series | SCT multi-position tie-rod cylinder |
| Bore size | Ø100 mm |
| Stroke 1 / Stroke 2 | 125 / 75 mm |
| Total travel | 200 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) | 125 mm |
| P2 (section 2) | 75 mm |
| P3 (both extended) | 200 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 SCT100X125X75
| SCT | Multi-position (tandem) tie-rod cylinder series. |
|---|---|
| 100 | Bore size in mm (SCT range 32–100). |
| ×125 | Stroke 1 (section 1) in mm. |
| ×75 | 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 SCT100X125X75 Is Used
Multi-Stop Diverter Gate
Operates a three-way diverter chute on a conveyor line, using the four rod positions to direct packages to separate lanes based on barcode data, ensuring reliable sorting without servo complexity.
Two-Depth Press Operation
Provides two distinct pressing depths in a single cycle for assembly or forming. The 75 mm and 125 mm strokes set two working heights, while the 200 mm total stroke allows full retraction for part loading and unloading.
Sequential Clamping Station
Clamps a workpiece in two stages: a 75 mm rapid-approach stroke brings the clamp near the part, followed by a 125 mm high-force clamping stroke. The discrete stops ensure consistent clamp pressure and position on every cycle.
Is the Airtac SCT80~100 Multi-Position Tandem Cylinder SCT100X125X75 the Right Cylinder?
Select the SCT when your application requires up to four fixed mechanical stop positions from a single compact actuator, eliminating the complexity and plumbing of two separate cylinders with external hard stops. This 100 mm bore model suits high-force tasks; if your load is lighter, stepping down to the 80 mm bore SCT80 series reduces the per-section push force to 2513 N at 0.5 MPa, which can lower air consumption and component cost. For a direct replacement, match the 100 mm bore, both strokes (125 mm and 75 mm), PT thread, and basic mounting configuration. Since the total travel is 200 mm, standard rod guiding is typically sufficient, but for significant side loads, consider an external guide rail to protect the piston rod and bearing from bending moments.
Multi-position checklist
- ✓ Need 4 repeatable stops?
- ✓ Section strokes 125 + 75 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 SCT100X125X75 FAQ
This tandem cylinder provides four discrete mechanical stop positions: 0 mm (fully retracted), 75 mm (second section extended), 125 mm (first section extended), and 200 mm (both sections extended, total travel). The positions are selected by pressurising the appropriate cylinder sections.
Yes, in applications needing fixed intermediate stops. The SCT100X125X75 integrates two strokes into one tie-rod body, simplifying mounting and air plumbing compared to two SC100 cylinders with external stops. For a drop-in replacement, ensure the replacement SCT matches the 100 mm bore, 125 mm and 75 mm strokes, PT port thread, and basic mounting style.
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