Airtac SCT32-63 Multi-Position Tandem Air Cylinder SCT40X60X25S
The AirTAC Airtac SCT32-63 Multi-Position Tandem Air Cylinder SCT40X60X25S is a genuine double-acting MULTI-POSITION (tandem) air cylinder: two piston sections of 60mm and 25mm give 4 controllable stop positions across a 85mm total travel, with a Ø40mm bore, PT1/4 ports and adjustable end cushioning.
- BoreØ40 mm
- Stroke 160 mm
- Stroke 225 mm
- Total travel85 mm
- Positions4 stops
- Port sizePT1/4
About the Airtac SCT32-63 Multi-Position Tandem Air Cylinder SCT40X60X25S
The AirTAC SCT40X60X25S is a double-acting multi-position tandem cylinder that delivers four fixed stop positions—0 mm, 25 mm, 60 mm, and the full 85 mm combined stroke—from two independently controlled piston sections on a single rod line. Each 40 mm bore section generates 628 N of push force at 0.5 MPa, rising to 1130 N at 0.9 MPa, making it suitable for two-depth pressing or multi-stop diverting tasks that require distinct, repeatable locations without complex servo controls.
This model includes a built-in magnet (-S suffix), allowing direct mounting of CMSG, DMSG, or EMSG reed and solid-state sensors on the 16 mm diameter rod's tie-rod barrel for reliable position feedback. The cylinder uses PT1/4 ports, standard TPU seals for a -20 to +70 °C range, and has a 21 mm adjustable air cushion in each section to manage end-of-stroke impact.
Airtac SCT32-63 Multi-Position Tandem Air Cylinder SCT40X60X25S Technical Specifications
| Model | Airtac SCT32-63 Multi-Position Tandem Air Cylinder SCT40X60X25S |
|---|---|
| Series | SCT multi-position tie-rod cylinder |
| Bore size | Ø40 mm |
| Stroke 1 / Stroke 2 | 60 / 25 mm |
| Total travel | 85 mm |
| Stop positions | 4 positions |
| Acting type | Double acting (tandem, multi-position) |
| Port size | PT1/4 |
| Rod thread | M12×1.25 |
| 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, 21 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) | 60 mm |
| P2 (section 2) | 25 mm |
| P3 (both extended) | 85 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 (Ø40mm)
| Pressure | Push force | Pull force |
|---|---|---|
| 0.5 MPa | 628 N | 528 N |
| 0.7 MPa | 880 N | — |
| Max (@1.0 MPa) | 128 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 SCT32-63 Multi-Position Tandem Air Cylinder SCT40X60X25S
| SCT | Multi-position (tandem) tie-rod cylinder series. |
|---|---|
| 40 | Bore size in mm (SCT range 32–100). |
| ×60 | 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 SCT32-63 Multi-Position Tandem Air Cylinder SCT40X60X25S Is Used
Two-Depth Pressing
Use the 25 mm stroke for a light pre-press or locating stop and the 60 mm stroke for the full forming press, achieving two distinct working depths from one compact tandem cylinder.
Multi-Stop Sorting Gate
Actuate a diverter gate to four fixed angles (0, 25, 60, 85 mm of rod travel) to route products down different conveyor lanes, with sensor confirmation at each position via the built-in magnet.
Staged Part Feeding
Advance a workpiece in three controlled steps—25 mm to clear a magazine, 60 mm to a machining station, and the full 85 mm to an ejection point—using a single SCT unit with position sensors.
Is the Airtac SCT32-63 Multi-Position Tandem Air Cylinder SCT40X60X25S the Right Cylinder?
The SCT40X60X25S is ideal when an application needs four discrete stopping points but space or control complexity rules out two separate cylinders with external stops. The asymmetric strokes provide two intermediate positions (25 mm and 60 mm) plus the fully retracted and fully extended positions, enabling a single compact unit to handle multi-step feeding or sorting. If higher force is needed, stepping up to the 50 mm bore SCT50X60X25 provides 982 N of push per section at 0.5 MPa, while the 32 mm bore offers 402 N for lighter, faster cycling.
For direct replacement, match the 40 mm bore, both the 60 mm and 25 mm strokes, PT port thread, basic mounting, and the integrated magnet (-S). Always ensure the load is guided if the combined 85 mm stroke creates a side-load risk on the 16 mm rod, and note that the cylinder does not hold position if air pressure is lost—external pilot-operated check valves or a mechanical rod lock are required for load holding.
Multi-position checklist
- ✓ Need 4 repeatable stops?
- ✓ Section strokes 60 + 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 SCT32-63 Multi-Position Tandem Air Cylinder SCT40X60X25S FAQ
This tandem cylinder provides four discrete rod positions: fully retracted (0 mm), the first section extended (25 mm), the second section extended (60 mm), and both sections extended for the total travel (85 mm). The positions are fixed by the two stroke lengths and are selected by pressurizing the appropriate cylinder sections.
Yes, in applications requiring two distinct stroke lengths from a single rod line, the SCT40X60X25S replaces two individually mounted cylinders and their external stop hardware. Ensure the replacement matches the 40 mm bore, 60 mm and 25 mm strokes, PT ports, and the -S magnet option for sensor compatibility.
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