Airtac SCT32-63 Multi-Position Tandem Air Cylinder SCT63X40X40S
The AirTAC Airtac SCT32-63 Multi-Position Tandem Air Cylinder SCT63X40X40S is a genuine double-acting MULTI-POSITION (tandem) air cylinder: two piston sections of 40mm and 40mm give 3 controllable stop positions across a 80mm total travel, with a Ø63mm bore, PT1/4 ports and adjustable end cushioning.
- BoreØ63 mm
- Stroke 140 mm
- Stroke 240 mm
- Total travel80 mm
- Positions3 stops
- Port sizePT1/4
About the Airtac SCT32-63 Multi-Position Tandem Air Cylinder SCT63X40X40S
The SCT63X40X40S is a double-acting multi-position tandem cylinder that delivers three distinct, repeatable rod positions: fully retracted (0 mm), 40 mm, and 80 mm total travel. By pressurising either of its two 40 mm stroke piston sections individually or both together, you achieve fixed mechanical stops without external hardware. Each 63 mm bore section generates 1559 N of push force at 0.5 MPa, rising to 2805 N at the maximum 0.9 MPa operating pressure.
This specific model includes a built-in magnet (-S suffix), allowing direct mounting of CMSG, DMSG, or EMSG sensors along the tie-rod barrel for non-contact position sensing. The cylinder uses a 20 mm diameter piston rod with an M16x1.5 thread, PT1/4 ports, and a 28 mm adjustable air cushion at each end for controlled deceleration. The body length A(SCT) is 249 mm.
Airtac SCT32-63 Multi-Position Tandem Air Cylinder SCT63X40X40S Technical Specifications
| Model | Airtac SCT32-63 Multi-Position Tandem Air Cylinder SCT63X40X40S |
|---|---|
| Series | SCT multi-position tie-rod cylinder |
| Bore size | Ø63 mm |
| Stroke 1 / Stroke 2 | 40 / 40 mm |
| Total travel | 80 mm |
| Stop positions | 3 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 (3)
| Position | Rod extension |
|---|---|
| P0 (retracted) | 0 mm |
| P1 (section 1) | 40 mm |
| P2 (both extended) | 80 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 SCT63X40X40S
| SCT | Multi-position (tandem) tie-rod cylinder series. |
|---|---|
| 63 | Bore size in mm (SCT range 32–100). |
| ×40 | 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 SCT63X40X40S Is Used
Two-Way Diverter Gate
Use the three positions (0, 40, 80 mm) to direct parts from a single infeed conveyor to two separate outfeed lanes, with a positive stop at each position for reliable sorting.
Multi-Depth Pressing
Achieve two different pressing depths in a single cycle—a partial advance to 40 mm for a pre-forming operation, then full extension to 80 mm for the final press stroke.
Staged Clamping Fixture
Control a clamp with a low-force 40 mm position for delicate part alignment and an 80 mm full-clamp position for high-force machining, all sensed by the integrated magnet.
Is the Airtac SCT32-63 Multi-Position Tandem Air Cylinder SCT63X40X40S the Right Cylinder?
Choose the SCT series when your application needs two or more fixed stopping points from a single, compact actuator, eliminating the complexity and plumbing of two separate cylinders with external stops. If the 1559 N push force at 0.5 MPa is insufficient, stepping up to an SCT80 bore provides 2513 N per section. For a direct replacement, match the 63 mm bore, both 40 mm strokes, PT port thread, basic mounting, and the -S magnet option.
With a 40 mm stroke per section, rod bending under side load is typically not a primary concern, but always align the load axially with the rod to maximise seal and bearing life. The basic mounting configuration requires you to support the cylinder body, with FA, FB, CA, CB, or LB brackets available as separate accessories.
Multi-position checklist
- ✓ Need 3 repeatable stops?
- ✓ Section strokes 40 + 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 SCT63X40X40S FAQ
This cylinder provides 3 discrete mechanical stop positions because both piston sections have an equal 40 mm stroke. The rod positions are 0 mm (fully retracted), 40 mm (first section extended), and 80 mm (both sections extended for total travel).
No, a standard single-rod SC cylinder cannot replace an SCT multi-position cylinder because it only provides two fixed stops (fully retracted and fully extended). You must use an SCT63 with matching 40 mm and 40 mm strokes, PT ports, and the -S magnet option to replicate the three-position functionality.
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