Airtac SCT32-63 Multi-Position Tandem Air Cylinder SCT63X35X5
The AirTAC Airtac SCT32-63 Multi-Position Tandem Air Cylinder SCT63X35X5 is a genuine double-acting MULTI-POSITION (tandem) air cylinder: two piston sections of 35mm and 5mm give 4 controllable stop positions across a 40mm total travel, with a Ø63mm bore, PT1/4 ports and adjustable end cushioning.
- BoreØ63 mm
- Stroke 135 mm
- Stroke 25 mm
- Total travel40 mm
- Positions4 stops
- Port sizePT1/4
About the Airtac SCT32-63 Multi-Position Tandem Air Cylinder SCT63X35X5
The SCT63X35X5 tandem cylinder provides four precise mechanical stop positions at 0 mm, 5 mm, 35 mm, and the full combined travel of 40 mm. This is achieved by independently pressurising two piston sections on a common 20 mm diameter rod, giving you a compact solution for short-stroke multi-stop tasks without needing external hard stops or multiple actuators.
Each 63 mm bore section generates 1559 N of push force at 0.5 MPa (2805 N at 0.9 MPa), while the pull force is 1402 N at 0.5 MPa. The cylinder body has an A(SCT) length of 249 mm and features an adjustable air cushion of 28 mm to decelerate the load smoothly at both ends of the total travel.
Airtac SCT32-63 Multi-Position Tandem Air Cylinder SCT63X35X5 Technical Specifications
| Model | Airtac SCT32-63 Multi-Position Tandem Air Cylinder SCT63X35X5 |
|---|---|
| Series | SCT multi-position tie-rod cylinder |
| Bore size | Ø63 mm |
| Stroke 1 / Stroke 2 | 35 / 5 mm |
| Total travel | 40 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) | 5 mm |
| P3 (both extended) | 40 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 SCT63X35X5
| SCT | Multi-position (tandem) tie-rod cylinder series. |
|---|---|
| 63 | Bore size in mm (SCT range 32–100). |
| ×35 | Stroke 1 (section 1) in mm. |
| ×5 | 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 SCT63X35X5 Is Used
Two-Depth Press Insertion
Use the 5 mm stroke for a light pre-press or locating position and the 35 mm stroke for the full insertion depth, ensuring consistent part seating in assembly fixtures.
Compact Diverter Gate
Actuate a small diverter gate on a conveyor to three positions: fully closed (0 mm), a partial opening at 5 mm for small parts, and a full opening at 35 mm or 40 mm for larger items.
Multi-Stop Glue Dispensing
Position a dispensing nozzle at a standby height (0 mm), a close-approach height (5 mm), and a contact dispense height (35 mm) for precise adhesive application on varying component profiles.
Is the Airtac SCT32-63 Multi-Position Tandem Air Cylinder SCT63X35X5 the Right Cylinder?
Choose the SCT63X35X5 when your application requires two distinct short extension lengths plus full retraction and full extension from a single tie-rod assembly. It replaces two separate standard cylinders and eliminates the complexity of aligning external stops. If you need higher force, stepping up to the 80 mm bore provides 2513 N of push per section at 0.5 MPa; for a lighter load, the 50 mm bore offers 982 N.
For direct replacement, match the 63 mm bore, both the 35 mm and 5 mm strokes, PT port thread, and basic mounting. If your existing unit has a magnet for sensors, ensure the replacement code includes the -S suffix. Note that the 35 mm stroke is a non-standard length, so this model is made-to-order.
Multi-position checklist
- ✓ Need 4 repeatable stops?
- ✓ Section strokes 35 + 5 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 SCT63X35X5 FAQ
This tandem cylinder provides four discrete mechanical stops: 0 mm (fully retracted), 5 mm (first section extended), 35 mm (second section extended), and 40 mm (both sections extended). The positions are fixed by the two stroke lengths and are not infinitely adjustable.
No. Like all standard pneumatic cylinders, the SCT63X35X5 will drift or drop if air pressure is lost or the valve is centered. It does not have a mechanical lock. If you need to hold a load at an intermediate position without live pressure, you must add an external rod brake or a pilot-operated check valve.
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