Airtac SCT80~100 Multi-Position Tandem Cylinder SCT100X25X15
The AirTAC Airtac SCT80~100 Multi-Position Tandem Cylinder SCT100X25X15 is a genuine double-acting MULTI-POSITION (tandem) air cylinder: two piston sections of 25mm and 15mm give 4 controllable stop positions across a 40mm total travel, with a Ø100mm bore, PT1/2 ports and adjustable end cushioning.
- BoreØ100 mm
- Stroke 125 mm
- Stroke 215 mm
- Total travel40 mm
- Positions4 stops
- Port sizePT1/2
About the Airtac SCT80~100 Multi-Position Tandem Cylinder SCT100X25X15
The AirTAC SCT100X25X15 is a double-acting, multi-position tandem cylinder that delivers four fixed rod positions from its two independent piston sections: 0 mm (fully retracted), 15 mm, 25 mm, and a total extended travel of 40 mm. This configuration is ideal for compact stations requiring shallow, distinct stroke depths, such as two-level part rejection or precise shuttling. Each 100 mm bore section generates a substantial 3927 N push force at 0.5 MPa, rising to 7068 N at the maximum operating pressure of 0.9 MPa.
Built on a robust tie-rod design with a 25 mm diameter piston rod and PT1/2 porting, the cylinder body has an overall length A of 308 mm. The integrated adjustable air cushion on each section, with a 29 mm cushion length, effectively decelerates the high mass loads this large bore can move, ensuring quiet, controlled stopping at each of the four discrete positions without the complexity of external shock absorbers.
Airtac SCT80~100 Multi-Position Tandem Cylinder SCT100X25X15 Technical Specifications
| Model | Airtac SCT80~100 Multi-Position Tandem Cylinder SCT100X25X15 |
|---|---|
| Series | SCT multi-position tie-rod cylinder |
| Bore size | Ø100 mm |
| Stroke 1 / Stroke 2 | 25 / 15 mm |
| Total travel | 40 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) | 15 mm |
| P3 (both extended) | 40 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 SCT100X25X15
| SCT | Multi-position (tandem) tie-rod cylinder series. |
|---|---|
| 100 | Bore size in mm (SCT range 32–100). |
| ×25 | Stroke 1 (section 1) in mm. |
| ×15 | 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 SCT100X25X15 Is Used
Two-Level Part Diverting
Uses the 15 mm and 25 mm stops to guide parts into two separate chutes from a single infeed conveyor, with the 40 mm position acting as a reject gate.
Multi-Depth Pressing
Provides two controlled pressing depths (15 mm and 25 mm) for installing seals or bearings to different step heights in a single assembly fixture.
Staged Product Stops
Acts as a three-position gate on a gravity conveyor, stopping a pallet at 15 mm for scanning, releasing it to 25 mm for a second operation, and fully retracting to 0 mm to let it pass.
Is the Airtac SCT80~100 Multi-Position Tandem Cylinder SCT100X25X15 the Right Cylinder?
Select the SCT100X25X15 when your application demands four distinct, repeatable stop positions within a very compact 40 mm total stroke envelope, eliminating the cost and complexity of two separate cylinders and their mounting hardware. The 100 mm bore provides high force density for heavy short-stroke tasks; if your load is lighter, stepping down to an 80 mm bore (2513 N push at 0.5 MPa) can reduce air consumption and physical footprint. For replacement, you must match the 100 mm bore, both the 25 mm and 15 mm section strokes, PT port thread, and the basic mounting configuration.
Multi-position checklist
- ✓ Need 4 repeatable stops?
- ✓ Section strokes 25 + 15 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 SCT100X25X15 FAQ
This tandem cylinder provides four discrete, fixed rod positions: 0 mm (fully retracted), 15 mm (first section extended), 25 mm (second section extended), and 40 mm (both sections extended). The positions are achieved by pressurizing one or both of the cylinder's two piston sections.
The SCT integrates two piston sections on a common rod line, ensuring perfect axial alignment and a shorter installed length than two separate cylinders with a floating coupling. It simplifies plumbing to three air ports and guarantees the 15 mm and 25 mm intermediate stops are mechanically fixed, removing the need for external hard stops and their associated alignment drift.
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