Airtac SCT32-63 Multi-Position Tandem Air Cylinder SCT40X30X20
The AirTAC Airtac SCT32-63 Multi-Position Tandem Air Cylinder SCT40X30X20 is a genuine double-acting MULTI-POSITION (tandem) air cylinder: two piston sections of 30mm and 20mm give 4 controllable stop positions across a 50mm total travel, with a Ø40mm bore, PT1/4 ports and adjustable end cushioning.
- BoreØ40 mm
- Stroke 130 mm
- Stroke 220 mm
- Total travel50 mm
- Positions4 stops
- Port sizePT1/4
About the Airtac SCT32-63 Multi-Position Tandem Air Cylinder SCT40X30X20
The SCT40X30X20 is a double-acting tandem cylinder that provides four fixed rod positions: 0 mm (fully retracted), 30 mm, 20 mm, and 50 mm (total travel). Each 40 mm bore section generates 628 N of push force at 0.5 MPa, making it suitable for light sorting or diverting tasks where two distinct intermediate stops are required.
Built on a durable tie-rod construction with a 16 mm diameter rod and M12x1.25 rod thread, 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, and the standard PT1/4 ports keep plumbing compact.
Airtac SCT32-63 Multi-Position Tandem Air Cylinder SCT40X30X20 Technical Specifications
| Model | Airtac SCT32-63 Multi-Position Tandem Air Cylinder SCT40X30X20 |
|---|---|
| Series | SCT multi-position tie-rod cylinder |
| Bore size | Ø40 mm |
| Stroke 1 / Stroke 2 | 30 / 20 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) | 30 mm |
| P2 (section 2) | 20 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 SCT40X30X20
| SCT | Multi-position (tandem) tie-rod cylinder series. |
|---|---|
| 40 | Bore size in mm (SCT range 32–100). |
| ×30 | Stroke 1 (section 1) in mm. |
| ×20 | 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 SCT40X30X20 Is Used
Two-Way Part Diverting
Uses the 30 mm and 20 mm intermediate stops to route small components to two separate conveyor lanes from a single feed point.
Multi-Depth Label Application
Applies labels at two different heights (20 mm and 30 mm) on a product, then fully extends to 50 mm for a tamp-down cycle.
Staged Assembly Press
Provides a light pre-press at 20 mm, a main seating stroke at 30 mm, and full retraction, all from one compact tandem unit.
Is the Airtac SCT32-63 Multi-Position Tandem Air Cylinder SCT40X30X20 the Right Cylinder?
Choose the SCT40X30X20 when your process needs four fixed stopping points without the complexity of two separate cylinders and external hard stops. If you need higher force at the same positions, consider stepping up to the 50 mm bore SCT50X30X20, which provides 982 N of push per section at 0.5 MPa. For a drop-in replacement, match the 40 mm bore, both strokes (30 mm and 20 mm), PT port thread, and basic mounting style exactly.
Multi-position checklist
- ✓ Need 4 repeatable stops?
- ✓ Section strokes 30 + 20 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 SCT40X30X20 FAQ
It provides four distinct mechanical stops: 0 mm (retracted), 30 mm, 20 mm, and 50 mm (full extension). The positions are selected by pressurising either the first section, the second section, or both simultaneously.
Yes, in applications requiring two fixed intermediate stops. The SCT40X30X20 integrates both strokes on a single rod line, eliminating the need for mounting brackets and alignment of two separate cylinders. Ensure the replacement matches the 40 mm bore, 30 mm and 20 mm strokes, and PT port thread.
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Related AirTAC SCT Multi-Position Cylinders
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