Airtac SCT32-63 Multi-Position Tandem Air Cylinder SCT40X35X15
The AirTAC Airtac SCT32-63 Multi-Position Tandem Air Cylinder SCT40X35X15 is a genuine double-acting MULTI-POSITION (tandem) air cylinder: two piston sections of 35mm and 15mm give 4 controllable stop positions across a 50mm total travel, with a Ø40mm bore, PT1/4 ports and adjustable end cushioning.
- BoreØ40 mm
- Stroke 135 mm
- Stroke 215 mm
- Total travel50 mm
- Positions4 stops
- Port sizePT1/4
About the Airtac SCT32-63 Multi-Position Tandem Air Cylinder SCT40X35X15
The SCT40X35X15 is a tandem multi-position cylinder that delivers four fixed rod positions from a single compact unit: 0 mm (fully retracted), 35 mm, 15 mm, and the total travel of 50 mm. By pressurising the two piston sections independently or together, you get repeatable mechanical stops without external hard stops or complex sensor setups. Each 40 mm bore section generates 628 N of push force at 0.5 MPa, making it suitable for light sorting and diverting tasks.
Built on a rugged tie-rod design with a 16 mm diameter rod and PT1/4 ports, this cylinder includes a 21 mm adjustable air cushion in each section for smooth end-of-stroke deceleration. The body length A(SCT) is 235 mm, providing a compact footprint for multi-stop pneumatic circuits. It operates on standard filtered air from 0.15 to 1.0 MPa across a temperature range of -20 to +70 °C with default TPU seals.
Airtac SCT32-63 Multi-Position Tandem Air Cylinder SCT40X35X15 Technical Specifications
| Model | Airtac SCT32-63 Multi-Position Tandem Air Cylinder SCT40X35X15 |
|---|---|
| Series | SCT multi-position tie-rod cylinder |
| Bore size | Ø40 mm |
| Stroke 1 / Stroke 2 | 35 / 15 mm |
| Total travel | 50 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) | 35 mm |
| P2 (section 2) | 15 mm |
| P3 (both extended) | 50 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 SCT40X35X15
| SCT | Multi-position (tandem) tie-rod cylinder series. |
|---|---|
| 40 | Bore size in mm (SCT range 32–100). |
| ×35 | Stroke 1 (section 1) in mm. |
| ×15 | 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 SCT40X35X15 Is Used
Two-Way Part Sorting
Use the four positions to direct parts to two different lanes. Retract to 0 mm for the home position, extend to 15 mm for lane one, 35 mm for lane two, or 50 mm to clear a jam, all from a single actuator.
Multi-Depth Labeling
Apply labels at two distinct depths on a product. The 15 mm stroke sets a shallow placement, while the 35 mm stroke handles a deeper recess, with the 0 mm and 50 mm positions serving as safe retract and full-extension maintenance stops.
Two-Step Clamping Fixture
Clamp a workpiece with a light 15 mm touch for alignment, then engage the full 35 mm stroke for high-force holding. The tandem design keeps both clamping pressures independently controllable from a single valve manifold.
Is the Airtac SCT32-63 Multi-Position Tandem Air Cylinder SCT40X35X15 the Right Cylinder?
Choose the SCT40X35X15 when your application needs four discrete mechanical positions without the complexity of two separate cylinders and a coupling. The unequal strokes (35 mm and 15 mm) give you a unique set of stops ideal for a two-step feed-and-lift or a diverter with a short reject position. If you require higher thrust, stepping up to the 50 mm bore provides 982 N of push per section at 0.5 MPa, while a step down to 32 mm offers 402 N for lighter, faster cycling.
For a direct replacement, match an AirTAC SCT with a 40 mm bore, 35 mm first stroke, 15 mm second stroke, PT port thread, and basic mounting. Since both section strokes are under 300 mm, rod buckling is not a primary concern under normal axial loads, but always align the load to minimize side forces on the 16 mm rod.
Multi-position checklist
- ✓ Need 4 repeatable stops?
- ✓ Section strokes 35 + 15 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 SCT40X35X15 FAQ
This tandem cylinder provides four discrete mechanical stops: 0 mm (fully retracted), 35 mm (first section extended), 15 mm (second section extended), and 50 mm (both sections extended for total travel). The positions are fixed by the two stroke lengths and are not infinitely adjustable.
The SCT integrates both strokes onto a single common rod, guaranteeing coaxial alignment and reducing mounting space and plumbing compared to two back-to-back cylinders. It gives you the same four-position functionality in a single, pre-aligned package with a 235 mm body length, eliminating the need for external couplings and extra brackets.
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