Airtac SCT32-63 Multi-Position Tandem Air Cylinder SCT40X25X25S
The AirTAC Airtac SCT32-63 Multi-Position Tandem Air Cylinder SCT40X25X25S is a genuine double-acting MULTI-POSITION (tandem) air cylinder: two piston sections of 25mm and 25mm give 3 controllable stop positions across a 50mm total travel, with a Ø40mm bore, PT1/4 ports and adjustable end cushioning.
- BoreØ40 mm
- Stroke 125 mm
- Stroke 225 mm
- Total travel50 mm
- Positions3 stops
- Port sizePT1/4
About the Airtac SCT32-63 Multi-Position Tandem Air Cylinder SCT40X25X25S
The SCT40X25X25S is a double-acting tandem cylinder that delivers three fixed rod positions: fully retracted (0 mm), 25 mm, and the total travel of 50 mm. Each piston section provides a push force of 628 N at 0.5 MPa, rising to 1130 N at the maximum operating pressure of 0.9 MPa, driven through a 16 mm diameter rod.
This model includes a built-in magnet, allowing direct mounting of CMSG, DMSG, or EMSG sensors on the tie-rod barrel for non-contact position feedback. The cylinder body has a base length of 235 mm with a 21 mm adjustable air cushion in each section, ensuring smooth deceleration at both intermediate and final stops.
Airtac SCT32-63 Multi-Position Tandem Air Cylinder SCT40X25X25S Technical Specifications
| Model | Airtac SCT32-63 Multi-Position Tandem Air Cylinder SCT40X25X25S |
|---|---|
| Series | SCT multi-position tie-rod cylinder |
| Bore size | Ø40 mm |
| Stroke 1 / Stroke 2 | 25 / 25 mm |
| Total travel | 50 mm |
| Stop positions | 3 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 (3)
| Position | Rod extension |
|---|---|
| P0 (retracted) | 0 mm |
| P1 (section 1) | 25 mm |
| P2 (both extended) | 50 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 SCT40X25X25S
| SCT | Multi-position (tandem) tie-rod cylinder series. |
|---|---|
| 40 | Bore size in mm (SCT range 32–100). |
| ×25 | 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 SCT40X25X25S Is Used
Two-Way Diverter Gate
Uses the three distinct positions (0, 25, 50 mm) to route parts from a single incoming lane into two separate outfeed conveyors, controlled by pressurizing each piston section independently.
Multi-Stop Part Staging
Provides a retracted home position and two extended stop points for staging components before a pick-and-place cycle, with the built-in magnet confirming arrival at each 25 mm increment.
Two-Depth Pressing Station
Achieves a shallow (25 mm) and deep (50 mm) pressing stroke in a single compact unit. The sensor-ready design verifies the correct depth was reached before the return stroke.
Is the Airtac SCT32-63 Multi-Position Tandem Air Cylinder SCT40X25X25S the Right Cylinder?
Select the SCT40X25X25S when an application requires a compact, three-position actuator with sensor feedback capability. For lighter loads, consider stepping down to the 32 mm bore, which provides 402 N of push per section at 0.5 MPa. If greater force is needed, the 50 mm bore offers 982 N per section at the same pressure. This cylinder is a direct replacement for an existing AirTAC SCT40X25X25S unit with a magnet, matching the 25 mm section strokes and PT port thread.
Multi-position checklist
- ✓ Need 3 repeatable stops?
- ✓ Section strokes 25 + 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 SCT40X25X25S FAQ
It provides 3 discrete mechanical stop positions because both piston sections have an identical 25 mm stroke. The rod positions are 0 mm (fully retracted), 25 mm (first section extended), and 50 mm (both sections extended for total travel).
Yes. The 'S' suffix in the model code confirms a built-in magnet is installed. You can clamp standard AirTAC CMSG (reed) or DMSG/EMSG (solid-state) sensors directly onto the cylinder's tie rods to detect the piston position at any of the three stops.
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