Airtac SCT32-63 Multi-Position Tandem Air Cylinder SCT40X145X145S
The AirTAC Airtac SCT32-63 Multi-Position Tandem Air Cylinder SCT40X145X145S is a genuine double-acting MULTI-POSITION (tandem) air cylinder: two piston sections of 145mm and 145mm give 3 controllable stop positions across a 290mm total travel, with a Ø40mm bore, PT1/4 ports and adjustable end cushioning.
- BoreØ40 mm
- Stroke 1145 mm
- Stroke 2145 mm
- Total travel290 mm
- Positions3 stops
- Port sizePT1/4
About the Airtac SCT32-63 Multi-Position Tandem Air Cylinder SCT40X145X145S
The SCT40X145X145S is a double-acting multi-position tandem cylinder that delivers three fixed rod positions: fully retracted (0 mm), mid-stroke (145 mm), and full extension (290 mm). Achieving these discrete stops by pressurising one or both piston sections, it provides a robust alternative to complex servo systems for repetitive two-depth operations. Each section generates 628 N of push force at 0.5 MPa, scaling up to 1130 N at 0.9 MPa, driven through a 16 mm diameter piston rod.
This model includes a built-in magnet, allowing direct mounting of CMSG, DMSG, or EMSG sensors along the tie-rod barrel for non-contact position confirmation at each stop. The cylinder body has a base length of 235 mm and features an adjustable pneumatic cushion of 21 mm at each end to manage deceleration. Operating on filtered air from 0.15 to 1.0 MPa, it uses standard PT1/4 ports and is fitted with TPU seals for a temperature range of -20 to +70 °C.
Airtac SCT32-63 Multi-Position Tandem Air Cylinder SCT40X145X145S Technical Specifications
| Model | Airtac SCT32-63 Multi-Position Tandem Air Cylinder SCT40X145X145S |
|---|---|
| Series | SCT multi-position tie-rod cylinder |
| Bore size | Ø40 mm |
| Stroke 1 / Stroke 2 | 145 / 145 mm |
| Total travel | 290 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) | 145 mm |
| P2 (both extended) | 290 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 SCT40X145X145S
| SCT | Multi-position (tandem) tie-rod cylinder series. |
|---|---|
| 40 | Bore size in mm (SCT range 32–100). |
| ×145 | Stroke 1 (section 1) in mm. |
| ×145 | 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 SCT40X145X145S Is Used
Two-Depth Part Insertion
Install a component to a precise 145 mm depth, then complete the press to a 290 mm final seated position using the second piston section, with sensor confirmation at each stage.
3-Position Diverter Gate
Use the three discrete rod positions (0, 145, 290 mm) to align a chute with three different conveyor lanes, enabling reliable sorting of packages by size or destination.
Multi-Level Palletising Stop
Create a physical stop for two different pallet heights. The cylinder extends to 145 mm for the first layer and 290 mm for the second, ensuring consistent stack alignment.
Is the Airtac SCT32-63 Multi-Position Tandem Air Cylinder SCT40X145X145S the Right Cylinder?
Select this SCT when a single actuator must consistently hit two distinct extension points, such as a 145 mm and a 290 mm stroke, without the complexity of two separate cylinders and external hard stops. If your application requires higher thrust at these positions, consider stepping up to the 50 mm bore SCT50 series, which provides 982 N of push force per section at 0.5 MPa. For a direct replacement, match the 40 mm bore, both 145 mm strokes, PT1/4 ports, and the integrated magnet; this is a basic mount model, so confirm your existing mounting brackets are compatible or select an FA, FB, CA, CB, or LB kit if a specific mounting interface is needed. With a total travel of 290 mm, ensure the load is guided to prevent excessive side-loading on the 16 mm rod.
Multi-position checklist
- ✓ Need 3 repeatable stops?
- ✓ Section strokes 145 + 145 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 SCT40X145X145S FAQ
This tandem cylinder provides 3 distinct mechanical stop positions because both piston sections have an identical 145 mm stroke. The rod positions are 0 mm (fully retracted), 145 mm (one section extended), and 290 mm (both sections extended).
Yes, it is a direct functional replacement for setups requiring two fixed strokes in one linear axis. To be a drop-in match, the replacement must be an SCT40 with 145 mm and 145 mm strokes, PT1/4 ports, and a built-in magnet. The SCT uses a single rod line and body, saving space and eliminating the need to synchronise two separate actuators.
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