Airtac SCT32-63 Multi-Position Tandem Air Cylinder SCT63X35X40S
The AirTAC Airtac SCT32-63 Multi-Position Tandem Air Cylinder SCT63X35X40S is a genuine double-acting MULTI-POSITION (tandem) air cylinder: two piston sections of 35mm and 40mm give 4 controllable stop positions across a 75mm total travel, with a Ø63mm bore, PT1/4 ports and adjustable end cushioning.
- BoreØ63 mm
- Stroke 135 mm
- Stroke 240 mm
- Total travel75 mm
- Positions4 stops
- Port sizePT1/4
About the Airtac SCT32-63 Multi-Position Tandem Air Cylinder SCT63X35X40S
The SCT63X35X40S is a double-acting multi-position tandem cylinder that creates four fixed rod positions from two independent piston sections on a common rod. With a 35 mm front stroke and a 40 mm rear stroke, the reachable stops are 0 mm (fully retracted), 35 mm, 40 mm, and the combined total travel of 75 mm. Each 63 mm bore section generates 1559 N of push force at 0.5 MPa, rising to 2805 N at the 0.9 MPa maximum operating pressure, driven through a 20 mm diameter piston rod.
This model includes a built-in magnet, designated by the -S suffix, allowing direct mounting of CMSG, DMSG, or EMSG sensors on the tie-rod barrel for non-contact position feedback. The cylinder body has an A(SCT) length of 249 mm, uses PT1/4 ports, and features an adjustable air cushion of 28 mm at each end to decelerate the load smoothly. It is a genuine AirTAC product, built for sequenced pneumatic circuits where multiple hard stops are required without complex servo controls.
Airtac SCT32-63 Multi-Position Tandem Air Cylinder SCT63X35X40S Technical Specifications
| Model | Airtac SCT32-63 Multi-Position Tandem Air Cylinder SCT63X35X40S |
|---|---|
| Series | SCT multi-position tie-rod cylinder |
| Bore size | Ø63 mm |
| Stroke 1 / Stroke 2 | 35 / 40 mm |
| Total travel | 75 mm |
| Stop positions | 4 positions |
| Acting type | Double acting (tandem, multi-position) |
| Port size | PT1/4 |
| Rod thread | M16×1.5 |
| 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, 28 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) | 35 mm |
| P2 (section 2) | 40 mm |
| P3 (both extended) | 75 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 (Ø63mm)
| Pressure | Push force | Pull force |
|---|---|---|
| 0.5 MPa | 1559 N | 1402 N |
| 0.7 MPa | 2182 N | — |
| Max (@1.0 MPa) | 318 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 SCT63X35X40S
| SCT | Multi-position (tandem) tie-rod cylinder series. |
|---|---|
| 63 | Bore size in mm (SCT range 32–100). |
| ×35 | Stroke 1 (section 1) in mm. |
| ×40 | 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 SCT63X35X40S Is Used
Two-Stage Part Diverting
Uses the 35 mm and 40 mm stroke positions to guide parts into three separate conveyor lanes, with the fourth retracted position acting as a bypass, all from one valve manifold.
Sequential Clamping
Applies a light clamp at the 35 mm stop for alignment, then drives to the full 75 mm extension for high-force pressing, using sensor feedback from the built-in magnet to confirm each stage.
Multi-Depth Insertion
Installs components to two different depths in a fixture—first a shallow press at 40 mm, then a deeper seat at 75 mm—without needing a secondary actuator or manual adjustment.
Is the Airtac SCT32-63 Multi-Position Tandem Air Cylinder SCT63X35X40S the Right Cylinder?
Choose the SCT tandem cylinder when your application needs up to four distinct mechanical stop positions from a single, compact actuator, avoiding the cost and complexity of two separate cylinders with external stop collars. For this 63 mm bore, the per-section push force at 0.5 MPa is 1559 N; if a higher thrust is needed, stepping up to the 80 mm bore provides 2513 N per section at the same pressure. Ensure the replacement matches the bore, both strokes (35 mm and 40 mm), the PT port thread, and the integrated magnet (-S) for sensor compatibility. Since the total travel is under 100 mm, rod buckling is not a concern, but always align the load axially to prevent side-loading on the rod bushing.
Multi-position checklist
- ✓ Need 4 repeatable stops?
- ✓ Section strokes 35 + 40 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 SCT63X35X40S FAQ
This tandem cylinder provides four discrete mechanical stops: 0 mm (fully retracted), 35 mm (first section extended), 40 mm (second section extended), and 75 mm (both sections fully extended). Because the two strokes differ (35 mm and 40 mm), you get four unique positions, selected by pressurizing the appropriate cylinder ports.
It is not an ISO 15552 cylinder, but it can functionally replace a setup of two separate 63 mm bore cylinders with 35 mm and 40 mm strokes that were previously used in tandem. The replacement must match the 63 mm bore, the exact stroke combination, the PT1/4 port thread, and the integrated magnet option (-S) for any existing sensors.
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