Airtac SCT32-63 Multi-Position Tandem Air Cylinder SCT32X75X25S
The AirTAC Airtac SCT32-63 Multi-Position Tandem Air Cylinder SCT32X75X25S is a genuine double-acting MULTI-POSITION (tandem) air cylinder: two piston sections of 75mm and 25mm give 4 controllable stop positions across a 100mm total travel, with a Ø32mm bore, PT1/8 ports and adjustable end cushioning.
- BoreØ32 mm
- Stroke 175 mm
- Stroke 225 mm
- Total travel100 mm
- Positions4 stops
- Port sizePT1/8
About the Airtac SCT32-63 Multi-Position Tandem Air Cylinder SCT32X75X25S
The SCT32X75X25S is a double-acting multi-position pneumatic cylinder that delivers four fixed rod positions: 0 mm (fully retracted), 25 mm, 75 mm, and the total travel of 100 mm. By pressurising its two piston sections independently or together, you gain precise, repeatable stopping points without external hard stops. Each 32 mm bore section generates 402 N of push force at 0.5 MPa, rising to 724 N at the maximum operating pressure of 0.9 MPa.
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 12 mm diameter piston rod and PT1/8 ports keep the unit compact, while the 21 mm adjustable air cushion at each end section decelerates the load smoothly. With a body length of 233 mm, it fits into tight machine envelopes where multiple stop positions are required.
Airtac SCT32-63 Multi-Position Tandem Air Cylinder SCT32X75X25S Technical Specifications
| Model | Airtac SCT32-63 Multi-Position Tandem Air Cylinder SCT32X75X25S |
|---|---|
| Series | SCT multi-position tie-rod cylinder |
| Bore size | Ø32 mm |
| Stroke 1 / Stroke 2 | 75 / 25 mm |
| Total travel | 100 mm |
| Stop positions | 4 positions |
| Acting type | Double acting (tandem, multi-position) |
| Port size | PT1/8 |
| Rod thread | M10×1.25 |
| 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) | 75 mm |
| P2 (section 2) | 25 mm |
| P3 (both extended) | 100 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 (Ø32mm)
| Pressure | Push force | Pull force |
|---|---|---|
| 0.5 MPa | 402 N | 346 N |
| 0.7 MPa | 563 N | — |
| Max (@1.0 MPa) | 82 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 SCT32X75X25S
| SCT | Multi-position (tandem) tie-rod cylinder series. |
|---|---|
| 32 | Bore size in mm (SCT range 32–100). |
| ×75 | 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 SCT32X75X25S Is Used
Two-Stage Diverter Gate
Operates a conveyor diverter with three positions: home (0 mm), partial divert (25 mm), and full divert (100 mm) for sorting packages to different lanes.
Multi-Level Part Staging
Positions a workpiece at three different heights (25, 75, 100 mm) for sequential assembly operations, eliminating the need for a lift-and-carry mechanism.
Depth-Selective Pressing
Drives a pressing tool to two distinct depths (25 mm and 75 mm) in a single cycle, using the 75 mm stroke for a primary form and the 100 mm total travel for a secondary coining operation.
Is the Airtac SCT32-63 Multi-Position Tandem Air Cylinder SCT32X75X25S the Right Cylinder?
Select the SCT32X75X25S when your application requires four distinct linear positions without the complexity of servo controls or multiple individual cylinders. This tandem unit is more compact and cost-effective than installing two separate 32 mm bore cylinders with external stoppers. If your force requirement is higher, consider stepping up to the 40 mm bore SCT40 series, which provides 628 N of push per section at the same 0.5 MPa pressure. For direct replacement, match the 32 mm bore, the exact strokes of 75 mm and 25 mm, the PT port thread, and the integrated magnet (-S suffix).
Multi-position checklist
- ✓ Need 4 repeatable stops?
- ✓ Section strokes 75 + 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 SCT32X75X25S FAQ
It provides four distinct mechanical stop positions: 0 mm (fully retracted), 25 mm (stroke 2 only), 75 mm (stroke 1 only), and 100 mm (both strokes extended). The positions are achieved by pressurising the two piston sections individually or simultaneously.
No. Like all standard pneumatic cylinders, the SCT32X75X25S will drift or drop if pressure is lost or the directional valve is centered. If the load must be mechanically locked at a stop position without live air pressure, you must add an external rod brake or a pilot-operated check valve.
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