Airtac SCT32-63 Multi-Position Tandem Air Cylinder SCT40X50X70S
The AirTAC Airtac SCT32-63 Multi-Position Tandem Air Cylinder SCT40X50X70S is a genuine double-acting MULTI-POSITION (tandem) air cylinder: two piston sections of 50mm and 70mm give 4 controllable stop positions across a 120mm total travel, with a Ø40mm bore, PT1/4 ports and adjustable end cushioning.
- BoreØ40 mm
- Stroke 150 mm
- Stroke 270 mm
- Total travel120 mm
- Positions4 stops
- Port sizePT1/4
About the Airtac SCT32-63 Multi-Position Tandem Air Cylinder SCT40X50X70S
The SCT40X50X70S is a tandem multi-position cylinder that delivers four fixed rod positions from two strokes on a single axis. By pressurising the sections independently or together, you reach 0 mm, 50 mm, 70 mm, and the full 120 mm total travel. Each 40 mm bore section provides 628 N of push force at 0.5 MPa, driven through a 16 mm diameter rod.
This model includes a built-in magnet, allowing CMSG, DMSG, or EMSG sensors to clamp directly onto the tie-rod barrel for end-of-stroke or intermediate position confirmation. The cylinder body has a length of 235 mm (A dimension) and uses PT1/4 ports. Its adjustable air cushion on both ends decelerates the piston smoothly, making it suitable for sorting gates or multi-depth pressing operations where sensor feedback is required.
Airtac SCT32-63 Multi-Position Tandem Air Cylinder SCT40X50X70S Technical Specifications
| Model | Airtac SCT32-63 Multi-Position Tandem Air Cylinder SCT40X50X70S |
|---|---|
| Series | SCT multi-position tie-rod cylinder |
| Bore size | Ø40 mm |
| Stroke 1 / Stroke 2 | 50 / 70 mm |
| Total travel | 120 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) | 50 mm |
| P2 (section 2) | 70 mm |
| P3 (both extended) | 120 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 SCT40X50X70S
| SCT | Multi-position (tandem) tie-rod cylinder series. |
|---|---|
| 40 | Bore size in mm (SCT range 32–100). |
| ×50 | Stroke 1 (section 1) in mm. |
| ×70 | 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 SCT40X50X70S Is Used
Two-Stage Diverter Gate
Actuate a chute gate to three distinct angles for routing packages. Position 1 at 0 mm closes lane A, position 2 at 50 mm opens lane B, and position 3 at 120 mm opens lane C, with the 70 mm stop used for a maintenance bypass.
Multi-Depth Insertion Press
Install a component to two controlled depths in a single cycle. The 50 mm stroke seats a bearing flush, while the full 120 mm stroke presses a seal to the bottom of a counterbore, eliminating the need for a secondary press station.
Staggered Part Feeding
Control a stop pin on a conveyor with four distinct heights to release rows of parts sequentially. The sensor magnet confirms the pin has retracted to the 0 mm home position before the next row advances.
Is the Airtac SCT32-63 Multi-Position Tandem Air Cylinder SCT40X50X70S the Right Cylinder?
Choose the SCT when your application needs two or more fixed mechanical stops without the complexity of two separate cylinders and a mounting bracket. This 40 mm bore model is a good fit when the 32 mm bore's 402 N push is too light, but the 50 mm bore's 982 N push is oversized for the load. For replacement, match the bore, both strokes (50 mm and 70 mm), the PT port thread, and the built-in magnet (-S suffix). The basic mounting style means it drops into an existing footprint that already has its own support structure.
Multi-position checklist
- ✓ Need 4 repeatable stops?
- ✓ Section strokes 50 + 70 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 SCT40X50X70S FAQ
This cylinder provides four distinct mechanical stop positions: 0 mm (fully retracted), 50 mm (first section extended), 70 mm (second section extended), and 120 mm (both sections extended for total travel).
No, an SCT is a tandem cylinder with two piston sections and is physically longer than a standard SC. You can only directly replace another AirTAC SCT that has the same 40 mm bore, 50 mm and 70 mm strokes, PT ports, and a built-in magnet.
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