Airtac SCT80~100 Multi-Position Tandem Cylinder SCT100X65X25S
The AirTAC Airtac SCT80~100 Multi-Position Tandem Cylinder SCT100X65X25S is a genuine double-acting MULTI-POSITION (tandem) air cylinder: two piston sections of 65mm and 25mm give 4 controllable stop positions across a 90mm total travel, with a Ø100mm bore, PT1/2 ports and adjustable end cushioning.
- BoreØ100 mm
- Stroke 165 mm
- Stroke 225 mm
- Total travel90 mm
- Positions4 stops
- Port sizePT1/2
About the Airtac SCT80~100 Multi-Position Tandem Cylinder SCT100X65X25S
The SCT100X65X25S is a double-acting multi-position cylinder that delivers four fixed rod positions from a single compact assembly: 0 mm (fully retracted), 25 mm, 65 mm, and the combined total travel of 90 mm. Each piston section generates a robust 3927 N of push force at 0.5 MPa, rising to 7068 N at the 0.9 MPa maximum operating pressure, making it a powerful solution for sequenced clamping or multi-depth pressing tasks.
This 100 mm bore tandem unit features a 25 mm diameter piston rod and PT1/2 port threads, with a body length A(SCT) of 308 mm. The built-in magnet, designated by the -S suffix, allows CMSG, DMSG, or EMSG solid-state and reed sensors to be mounted directly onto the tie-rod barrel for non-contact position confirmation at each of the four discrete stops.
Airtac SCT80~100 Multi-Position Tandem Cylinder SCT100X65X25S Technical Specifications
| Model | Airtac SCT80~100 Multi-Position Tandem Cylinder SCT100X65X25S |
|---|---|
| Series | SCT multi-position tie-rod cylinder |
| Bore size | Ø100 mm |
| Stroke 1 / Stroke 2 | 65 / 25 mm |
| Total travel | 90 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) | 65 mm |
| P2 (section 2) | 25 mm |
| P3 (both extended) | 90 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 SCT100X65X25S
| SCT | Multi-position (tandem) tie-rod cylinder series. |
|---|---|
| 100 | Bore size in mm (SCT range 32–100). |
| ×65 | Stroke 1 (section 1) in mm. |
| ×25 | 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 SCT100X65X25S Is Used
Two-Depth Press Insertion
The four discrete positions (0, 25, 65, 90 mm) allow a press tool to advance to a 25 mm pre-set depth for one component, then extend further to 65 mm for a deeper insertion, all with sensor-verified stops via the integrated magnet.
Multi-Stop Diverter Gate
Actuate a material diverter gate to three distinct open positions: a 25 mm partial bypass, a 65 mm main flow path, and a fully open 90 mm position for cleaning access, using the SCT's fixed mechanical stops for high repeatability.
Sequential Clamping Station
Use the 25 mm stroke to apply an initial low-clearance clamp, then pressurize the second section for the full 65 mm stroke to engage a secondary locking feature, with the 3927 N per-section force ensuring a secure hold on heavy workpieces.
Is the Airtac SCT80~100 Multi-Position Tandem Cylinder SCT100X65X25S the Right Cylinder?
Select this SCT model when your application requires two distinct, repeatable intermediate stop positions without the complexity of two separate cylinders and external hard stops. The 65 mm and 25 mm stroke combination provides an asymmetric movement profile ideal for a primary long advance followed by a precise short positioning stroke. If higher force is needed, stepping up is not possible as 100 mm is the maximum SCT bore; for lower force, an SCT80 bore provides 2513 N of push at 0.5 MPa. To ensure a direct replacement, match the 100 mm bore, both the 65 mm and 25 mm strokes, PT port threads, and the -S magnet option.
Multi-position checklist
- ✓ Need 4 repeatable stops?
- ✓ Section strokes 65 + 25 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 SCT100X65X25S FAQ
This tandem cylinder provides four discrete mechanical stops: 0 mm (fully retracted), 25 mm (stroke 2 only), 65 mm (stroke 1 only), and 90 mm (both sections extended, total travel). The built-in magnet allows sensors to verify arrival at each position.
The SCT integrates both strokes into a single, compact tie-rod body with a common piston rod, eliminating the need for external coupling brackets and alignment fixtures. It provides the same 3927 N push force per actuated section at 0.5 MPa as a standard SC100 cylinder, but in a simpler, space-saving package with four fixed stop positions controlled by pressurizing each section independently or together.
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