Airtac SCT32-63 Multi-Position Tandem Air Cylinder SCT40X8X8
The AirTAC Airtac SCT32-63 Multi-Position Tandem Air Cylinder SCT40X8X8 is a genuine double-acting MULTI-POSITION (tandem) air cylinder: two piston sections of 8mm and 8mm give 3 controllable stop positions across a 16mm total travel, with a Ø40mm bore, PT1/4 ports and adjustable end cushioning.
- BoreØ40 mm
- Stroke 18 mm
- Stroke 28 mm
- Total travel16 mm
- Positions3 stops
- Port sizePT1/4
About the Airtac SCT32-63 Multi-Position Tandem Air Cylinder SCT40X8X8
The SCT40X8X8 is a tandem multi-position cylinder that delivers three fixed rod positions: fully retracted (0 mm), 8 mm, and 16 mm total travel. Each 40 mm bore section generates 628 N of push force at 0.5 MPa, making it suitable for compact, short-throw diverting or sorting tasks.
This double-acting unit uses a 16 mm diameter rod with PT1/4 ports and an M12x1.25 rod thread. The body length A(SCT) is 235 mm, and the adjustable air cushion is 21 mm long, helping to manage end-of-stroke impact in rapid cycling applications.
Airtac SCT32-63 Multi-Position Tandem Air Cylinder SCT40X8X8 Technical Specifications
| Model | Airtac SCT32-63 Multi-Position Tandem Air Cylinder SCT40X8X8 |
|---|---|
| Series | SCT multi-position tie-rod cylinder |
| Bore size | Ø40 mm |
| Stroke 1 / Stroke 2 | 8 / 8 mm |
| Total travel | 16 mm |
| Stop positions | 3 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 (3)
| Position | Rod extension |
|---|---|
| P0 (retracted) | 0 mm |
| P1 (section 1) | 8 mm |
| P2 (both extended) | 16 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 SCT40X8X8
| SCT | Multi-position (tandem) tie-rod cylinder series. |
|---|---|
| 40 | Bore size in mm (SCT range 32–100). |
| ×8 | Stroke 1 (section 1) in mm. |
| ×8 | 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 SCT40X8X8 Is Used
Miniature Part Diverting
The 8 mm and 16 mm positions reliably divert small components between two conveyor lanes in high-speed packaging lines.
Two-Depth Pressing
Provides a light touch at 8 mm extension and a full press at 16 mm, ideal for delicate assembly or staking operations.
Short-Stroke Gate Actuation
Operates a two-position gate or shutter, using the intermediate stop for a partial-open state to meter small parts.
Is the Airtac SCT32-63 Multi-Position Tandem Air Cylinder SCT40X8X8 the Right Cylinder?
Choose the SCT40X8X8 when a single cylinder must provide two distinct extended positions without the complexity of external hard stops. If you need more force per section, stepping up to the 50 mm bore delivers 982 N push at 0.5 MPa. For a direct replacement, match the 40 mm bore, both 8 mm strokes, PT port thread, and basic mounting configuration.
Multi-position checklist
- ✓ Need 3 repeatable stops?
- ✓ Section strokes 8 + 8 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 SCT40X8X8 FAQ
It provides three discrete positions: 0 mm (fully retracted), 8 mm (first section extended), and 16 mm (both sections extended). The stops are fixed by the two 8 mm strokes.
Yes, this is a direct replacement for an AirTAC SCT40X8X8 with basic mounting and PT threads. Ensure both stroke sections match at 8 mm each and the port thread type is PT.
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Standard models usually ship in 3-4 days.
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