Airtac SCT32-63 Multi-Position Tandem Air Cylinder SCT40X25X175S
The AirTAC Airtac SCT32-63 Multi-Position Tandem Air Cylinder SCT40X25X175S is a genuine double-acting MULTI-POSITION (tandem) air cylinder: two piston sections of 25mm and 175mm give 4 controllable stop positions across a 200mm total travel, with a Ø40mm bore, PT1/4 ports and adjustable end cushioning.
- BoreØ40 mm
- Stroke 125 mm
- Stroke 2175 mm
- Total travel200 mm
- Positions4 stops
- Port sizePT1/4
About the Airtac SCT32-63 Multi-Position Tandem Air Cylinder SCT40X25X175S
The SCT40X25X175S is a tandem multi-position air cylinder that delivers four fixed rod positions—0 mm, 25 mm, 175 mm, and 200 mm total travel—by pressurising its two piston sections independently. Each section generates 628 N of push force at 0.5 MPa, with a 16 mm diameter rod and a 21 mm adjustable air cushion at each end for smooth deceleration.
This model includes a built-in magnet (-S suffix), allowing CMSG, DMSG, or EMSG sensors to be clamped directly onto the tie-rod barrel for non-contact position sensing. The body length A(SCT) is 235 mm, and the standard PT1/4 ports keep the pneumatic connections straightforward for a 40 mm bore.
Airtac SCT32-63 Multi-Position Tandem Air Cylinder SCT40X25X175S Technical Specifications
| Model | Airtac SCT32-63 Multi-Position Tandem Air Cylinder SCT40X25X175S |
|---|---|
| Series | SCT multi-position tie-rod cylinder |
| Bore size | Ø40 mm |
| Stroke 1 / Stroke 2 | 25 / 175 mm |
| Total travel | 200 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) | 175 mm |
| P3 (both extended) | 200 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 SCT40X25X175S
| SCT | Multi-position (tandem) tie-rod cylinder series. |
|---|---|
| 40 | Bore size in mm (SCT range 32–100). |
| ×25 | Stroke 1 (section 1) in mm. |
| ×175 | 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 SCT40X25X175S Is Used
Two-Stage Sorting Gate
Use the 25 mm stroke for a partial gate opening and the 175 mm stroke for a full bypass, directing packages to three different lanes from one actuator.
Multi-Depth Marking
The 0, 25, 175, and 200 mm positions allow a marking head to apply labels or stamps at two distinct depths on parts of varying thickness.
Sequential Part Feeding
Advance a pusher 25 mm to separate a single component from a stack, then extend to 175 mm to transfer it fully onto the next conveyor zone.
Is the Airtac SCT32-63 Multi-Position Tandem Air Cylinder SCT40X25X175S the Right Cylinder?
Choose this SCT when you need four distinct mechanical stops without the complexity of two separate cylinders and external hard stops. The 25 mm and 175 mm strokes give you a short advance and a longer secondary position, ideal for two-stage feeding or diverting. If you require more force per section, step up to the 50 mm bore SCT, which provides 982 N of push at 0.5 MPa. For a direct replacement, match the 40 mm bore, both 25 mm and 175 mm strokes, PT port thread, basic mounting, and the integrated magnet (-S).
Multi-position checklist
- ✓ Need 4 repeatable stops?
- ✓ Section strokes 25 + 175 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 SCT40X25X175S FAQ
The four discrete rod positions are 0 mm (fully retracted), 25 mm (first section extended), 175 mm (second section extended), and 200 mm (both sections extended).
Yes, it replaces a pair of 40 mm bore SC cylinders with 25 mm and 175 mm strokes where you need fixed intermediate positions. Ensure the replacement matches the PT1/4 ports, basic mounting, and the -S magnet option for sensor compatibility.
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