Airtac SCT32-63 Multi-Position Tandem Air Cylinder SCT63X35X25
The AirTAC Airtac SCT32-63 Multi-Position Tandem Air Cylinder SCT63X35X25 is a genuine double-acting MULTI-POSITION (tandem) air cylinder: two piston sections of 35mm and 25mm give 4 controllable stop positions across a 60mm total travel, with a Ø63mm bore, PT1/4 ports and adjustable end cushioning.
- BoreØ63 mm
- Stroke 135 mm
- Stroke 225 mm
- Total travel60 mm
- Positions4 stops
- Port sizePT1/4
About the Airtac SCT32-63 Multi-Position Tandem Air Cylinder SCT63X35X25
The SCT63X35X25 is a tandem multi-position pneumatic cylinder that delivers four distinct rod positions from a single compact assembly. By pressurising its two 63 mm bore sections independently or together, the rod stops precisely at 0 mm (fully retracted), 25 mm, 35 mm, and the full 60 mm combined travel.
Each actuated piston section generates 1559 N of push force at 0.5 MPa, rising to 2805 N at the maximum operating pressure of 0.9 MPa. The unit uses a 20 mm diameter piston rod with an M16x1.5 male thread and features a 28 mm adjustable air cushion at each end. Its tie-rod body has an A-length of 249 mm and breathes through PT1/4 ports.
Airtac SCT32-63 Multi-Position Tandem Air Cylinder SCT63X35X25 Technical Specifications
| Model | Airtac SCT32-63 Multi-Position Tandem Air Cylinder SCT63X35X25 |
|---|---|
| Series | SCT multi-position tie-rod cylinder |
| Bore size | Ø63 mm |
| Stroke 1 / Stroke 2 | 35 / 25 mm |
| Total travel | 60 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) | 25 mm |
| P3 (both extended) | 60 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 SCT63X35X25
| SCT | Multi-position (tandem) tie-rod cylinder series. |
|---|---|
| 63 | Bore size in mm (SCT range 32–100). |
| ×35 | Stroke 1 (section 1) in mm. |
| ×25 | 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 SCT63X35X25 Is Used
Two-Depth Part Insertion
Drives a tool to a shallow 25 mm pre-insertion position and a deeper 35 mm final set depth, with full 60 mm retraction for part clearance.
3-Way Diverter Gate
Positions a diverter blade at 0 mm (lane A), 25 mm (lane B), or 35 mm (lane C) using only two solenoid valves, simplifying small-part sorting conveyors.
Multi-Stop Clamping Fixture
Provides three clamping thicknesses in one station: fully open at 0 mm, clamp thin parts at 25 mm, and clamp thicker parts at 35 mm, reducing changeover time.
Is the Airtac SCT32-63 Multi-Position Tandem Air Cylinder SCT63X35X25 the Right Cylinder?
Select this SCT63 when a single actuator must deliver two different intermediate stop points without the complexity of external hard stops or dual-cylinder setups. The 25 mm and 35 mm strokes create a compact 4-position solution ideal for short-throw sorting or two-depth pressing. If your force requirement is lower, stepping down to a 50 mm bore reduces per-section push to 982 N at 0.5 MPa; for heavier loads, the 80 mm bore provides 2513 N.
For a direct replacement, match the 63 mm bore, both the 35 mm and 25 mm section strokes, PT1/4 port thread, and basic mounting. When either stroke reaches 300 mm or more, consider external guide rods to protect the piston rod from side-load bending, though this model's short strokes rarely require it.
Multi-position checklist
- ✓ Need 4 repeatable stops?
- ✓ Section strokes 35 + 25 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 SCT63X35X25 FAQ
This 4-position cylinder stops at 0 mm (fully retracted), 25 mm (section 2 extended), 35 mm (section 1 extended), and 60 mm (both sections extended). The positions are fixed by the two stroke lengths and are not infinitely adjustable.
Yes, it often can. The SCT63X35X25 combines a 35 mm and a 25 mm stroke in one tandem body, giving you the same three extended positions without the alignment and plumbing complexity of two individual cylinders. Ensure the replacement matches the 63 mm bore, PT1/4 ports, and your required mounting style.
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