Airtac SCT32-63 Multi-Position Tandem Air Cylinder SCT40X30X70
The AirTAC Airtac SCT32-63 Multi-Position Tandem Air Cylinder SCT40X30X70 is a genuine double-acting MULTI-POSITION (tandem) air cylinder: two piston sections of 30mm and 70mm give 4 controllable stop positions across a 100mm total travel, with a Ø40mm bore, PT1/4 ports and adjustable end cushioning.
- BoreØ40 mm
- Stroke 130 mm
- Stroke 270 mm
- Total travel100 mm
- Positions4 stops
- Port sizePT1/4
About the Airtac SCT32-63 Multi-Position Tandem Air Cylinder SCT40X30X70
The SCT40X30X70 is a tandem multi-position cylinder that delivers four distinct rod positions: 0 mm (fully retracted), 30 mm, 70 mm, and 100 mm total travel. By pressurising the two piston sections independently or together, you get fixed mechanical stops without the complexity of servo systems. Each 40 mm bore section generates 628 N of push force at 0.5 MPa, rising to 1130 N at the maximum operating pressure of 0.9 MPa.
This model uses a 16 mm diameter rod with M12x1.25 threads and PT1/4 ports. The adjustable air cushion at each end (21 mm length) decelerates the load smoothly across the 30-800 mm/s speed range. The tie-rod construction and 235 mm body length A(SCT) make it a robust, field-serviceable unit for sorting and diverting tasks where three or four mechanical positions are needed.
Airtac SCT32-63 Multi-Position Tandem Air Cylinder SCT40X30X70 Technical Specifications
| Model | Airtac SCT32-63 Multi-Position Tandem Air Cylinder SCT40X30X70 |
|---|---|
| Series | SCT multi-position tie-rod cylinder |
| Bore size | Ø40 mm |
| Stroke 1 / Stroke 2 | 30 / 70 mm |
| Total travel | 100 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) | 70 mm |
| P3 (both extended) | 100 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 SCT40X30X70
| SCT | Multi-position (tandem) tie-rod cylinder series. |
|---|---|
| 40 | Bore size in mm (SCT range 32–100). |
| ×30 | Stroke 1 (section 1) in mm. |
| ×70 | 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 SCT40X30X70 Is Used
3-Way Part Diverting
Use the 0, 30, and 100 mm positions to guide parts into three separate chutes on a conveyor line, with the 70 mm position available for a fourth lane or reject station.
Two-Depth Press Insertion
Set a shallow press depth at 30 mm and a full-seat depth at 100 mm. The 70 mm intermediate stop can act as a slow-approach checkpoint before final insertion.
Multi-Stop Gate Control
Control a material gate with four defined openings. The 30 mm and 70 mm strokes provide partial-flow positions, while 0 and 100 mm give full-close and full-open.
Is the Airtac SCT32-63 Multi-Position Tandem Air Cylinder SCT40X30X70 the Right Cylinder?
Choose the SCT when your application needs two or three discrete extension points from a single compact actuator, avoiding the cost and plumbing of two separate cylinders with external stops. The 40 mm bore suits moderate push loads—if you need more force, stepping up to the 50 mm bore gives 982 N push per section at the same 0.5 MPa. For a lighter, faster-moving load, the 32 mm bore offers 402 N push.
To replace an existing SCT40X30X70, match the bore, both strokes (30 mm and 70 mm), PT port thread, and basic mounting style. If the original unit had a magnet for sensors, ensure the replacement code includes the -S suffix. For strokes over 300 mm, consider external guiding to protect the 16 mm rod from side-load bending.
Multi-position checklist
- ✓ Need 4 repeatable stops?
- ✓ Section strokes 30 + 70 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 SCT40X30X70 FAQ
It provides four discrete mechanical stop positions: 0 mm (fully retracted), 30 mm, 70 mm, and 100 mm (full extension, which is the sum of both strokes). The positions are achieved by pressurising the front section, rear section, or both simultaneously.
Yes, if your sequence only requires the fixed 30 mm and 70 mm stroke endpoints. The SCT combines both strokes on a single common rod, saving mounting space and eliminating the need to synchronise two separate cylinder movements. Ensure the port thread (PT) and basic mounting match your setup.
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