Airtac SCT32-63 Multi-Position Tandem Air Cylinder SCT40X67X8S
The AirTAC Airtac SCT32-63 Multi-Position Tandem Air Cylinder SCT40X67X8S is a genuine double-acting MULTI-POSITION (tandem) air cylinder: two piston sections of 67mm and 8mm give 4 controllable stop positions across a 75mm total travel, with a Ø40mm bore, PT1/4 ports and adjustable end cushioning.
- BoreØ40 mm
- Stroke 167 mm
- Stroke 28 mm
- Total travel75 mm
- Positions4 stops
- Port sizePT1/4
About the Airtac SCT32-63 Multi-Position Tandem Air Cylinder SCT40X67X8S
The SCT40X67X8S is a double-acting multi-position tandem cylinder that delivers four distinct rod positions from its two piston sections: 0 mm (fully retracted), 8 mm, 67 mm, and the total travel of 75 mm. Each 40 mm bore section generates a push force of 628 N at 0.5 MPa, making it suitable for light sorting or diverting tasks where two different short extension lengths are needed from one compact unit.
This model includes a built-in magnet (-S suffix), allowing CMSG, DMSG, or EMSG solid-state or reed sensors to be clamped directly onto the tie-rod barrel for end-of-stroke or intermediate position confirmation. The 16 mm diameter piston rod and PT1/4 ports are standard for the 40 mm bore, and the adjustable pneumatic cushion at each end (21 mm long) provides smooth deceleration across the 30-800 mm/s speed range.
Airtac SCT32-63 Multi-Position Tandem Air Cylinder SCT40X67X8S Technical Specifications
| Model | Airtac SCT32-63 Multi-Position Tandem Air Cylinder SCT40X67X8S |
|---|---|
| Series | SCT multi-position tie-rod cylinder |
| Bore size | Ø40 mm |
| Stroke 1 / Stroke 2 | 67 / 8 mm |
| Total travel | 75 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) | 67 mm |
| P2 (section 2) | 8 mm |
| P3 (both extended) | 75 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 SCT40X67X8S
| SCT | Multi-position (tandem) tie-rod cylinder series. |
|---|---|
| 40 | Bore size in mm (SCT range 32–100). |
| ×67 | 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 SCT40X67X8S Is Used
Two-Way Part Diverting
Uses the 8 mm and 67 mm stroke positions to guide parts into two separate chutes from a single conveyor lane, with sensors confirming the rod is at the correct divert point.
Dual-Depth Stop Gate
Acts as a retractable gate with two open heights. The 8 mm stroke partially blocks small items, while the 67 mm stroke stops larger packages, all from one actuator.
Two-Stage Label Press
Applies pressure at two distinct depths. The 8 mm stroke performs a light tack, and the 67 mm stroke completes the full-pressure application on a labeling fixture.
Is the Airtac SCT32-63 Multi-Position Tandem Air Cylinder SCT40X67X8S the Right Cylinder?
Choose the SCT40X67X8S when your process requires two different short stopping points without the complexity of two separate cylinders and external hard stops. If you need higher force at these positions, stepping up to a 50 mm bore SCT provides 982 N of push per section at 0.5 MPa. For a direct replacement, match the 40 mm bore, the exact 67 mm and 8 mm strokes, PT port thread, and the -S magnet option; the basic mounting style means no additional brackets are included.
Multi-position checklist
- ✓ Need 4 repeatable stops?
- ✓ Section strokes 67 + 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 SCT40X67X8S FAQ
It provides four discrete mechanical stops: 0 mm (fully retracted), 8 mm, 67 mm, and the total extended length of 75 mm. These are fixed by the two different section strokes and are not infinitely variable.
Yes. The -S suffix in the model code indicates a built-in magnet is installed in the piston, making it directly compatible with AirTAC CMSG, DMSG, and EMSG series sensors that mount on the cylinder's tie-rod barrel.
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