Airtac SCT32-63 Multi-Position Tandem Air Cylinder SCT40X25X350S
The AirTAC Airtac SCT32-63 Multi-Position Tandem Air Cylinder SCT40X25X350S is a genuine double-acting MULTI-POSITION (tandem) air cylinder: two piston sections of 25mm and 350mm give 4 controllable stop positions across a 375mm total travel, with a Ø40mm bore, PT1/4 ports and adjustable end cushioning.
- BoreØ40 mm
- Stroke 125 mm
- Stroke 2350 mm
- Total travel375 mm
- Positions4 stops
- Port sizePT1/4
About the Airtac SCT32-63 Multi-Position Tandem Air Cylinder SCT40X25X350S
The SCT40X25X350S is a tandem multi-position cylinder that delivers four fixed rod positions: 0 mm (fully retracted), 25 mm, 350 mm, and the total travel of 375 mm. By pressurising the two piston sections independently or together, you get repeatable mechanical stops without external hardware. Each 40 mm bore section generates 628 N of push force at 0.5 MPa, driven by a 16 mm diameter piston rod.
A built-in magnet is integrated into the piston, allowing CMSG, DMSG, or EMSG solid-state sensors to clamp directly onto the tie-rod barrel for non-contact position sensing. The cylinder body has a base length of 235 mm and uses adjustable pneumatic cushioning with a 21 mm cushion sleeve to decelerate the load smoothly at both ends of the 350 mm stroke section. Operating on filtered air from 0.15 to 1.0 MPa, this genuine AirTAC unit suits sorting and indexing tasks where sensor feedback at each stop is required.
Airtac SCT32-63 Multi-Position Tandem Air Cylinder SCT40X25X350S Technical Specifications
| Model | Airtac SCT32-63 Multi-Position Tandem Air Cylinder SCT40X25X350S |
|---|---|
| Series | SCT multi-position tie-rod cylinder |
| Bore size | Ø40 mm |
| Stroke 1 / Stroke 2 | 25 / 350 mm |
| Total travel | 375 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) | 25 mm |
| P2 (section 2) | 350 mm |
| P3 (both extended) | 375 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 SCT40X25X350S
| SCT | Multi-position (tandem) tie-rod cylinder series. |
|---|---|
| 40 | Bore size in mm (SCT range 32–100). |
| ×25 | Stroke 1 (section 1) in mm. |
| ×350 | 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 SCT40X25X350S Is Used
4-Position Sorting Gate
Direct packages to four separate conveyor lanes by stopping the cylinder rod at 0, 25, 350, or 375 mm, with magnetic sensors confirming each gate position.
Multi-Depth Label Application
Apply labels at two different product heights using the 25 mm and 350 mm stops, then fully retract or extend to 375 mm for product clearance and magazine reload.
Staged Component Insertion
Insert a part to a shallow 25 mm depth for pre-assembly, then drive it home to the full 375 mm depth, using the intermediate 350 mm stop for adhesive dispensing.
Is the Airtac SCT32-63 Multi-Position Tandem Air Cylinder SCT40X25X350S the Right Cylinder?
Choose the SCT40X25X350S when your process needs four distinct mechanical stops and sensor confirmation at each position, eliminating the complexity of two separate cylinders and external stop collars. The 40 mm bore provides 628 N of push per section at 0.5 MPa; if your load requires more thrust, stepping up to the 50 mm bore (SCT50) delivers 982 N per section at the same pressure. For a direct replacement, match the 40 mm bore, both the 25 mm and 350 mm strokes, PT port thread, and the -S magnet option. Because the 350 mm stroke section is extended, ensure the rod is guided if significant side loads are present to prevent bending and premature seal wear.
Multi-position checklist
- ✓ Need 4 repeatable stops?
- ✓ Section strokes 25 + 350 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 SCT40X25X350S FAQ
This tandem cylinder provides four discrete mechanical stops: 0 mm (fully retracted), 25 mm (section one extended), 350 mm (section two extended), and 375 mm (both sections extended). The positions are fixed by the two stroke lengths and are not infinitely adjustable.
Yes, it is designed to replace two individual cylinders and external stops in a tandem setup. For a compatible swap, ensure the replacement matches the 40 mm bore, both the 25 mm and 350 mm strokes, PT port thread, and the integrated magnet option (-S) for sensor mounting.
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