Airtac SCT32-63 Multi-Position Tandem Air Cylinder SCT40X620X50S
The AirTAC Airtac SCT32-63 Multi-Position Tandem Air Cylinder SCT40X620X50S is a genuine double-acting MULTI-POSITION (tandem) air cylinder: two piston sections of 620mm and 50mm give 4 controllable stop positions across a 670mm total travel, with a Ø40mm bore, PT1/4 ports and adjustable end cushioning.
- BoreØ40 mm
- Stroke 1620 mm
- Stroke 250 mm
- Total travel670 mm
- Positions4 stops
- Port sizePT1/4
About the Airtac SCT32-63 Multi-Position Tandem Air Cylinder SCT40X620X50S
The SCT40X620X50S creates four fixed rod positions by combining a 620 mm primary stroke with a 50 mm secondary stroke on a single 40 mm bore tie-rod body. The reachable stops are 0 mm (fully retracted), 50 mm, 620 mm, and the total travel of 670 mm, giving machines a compact way to handle two distinct extended work points without dual cylinders.
Each piston section delivers 628 N of push force at 0.5 MPa and up to 1130 N at 0.9 MPa, moving a 16 mm diameter rod. The 620 mm section exceeds the standard 500 mm range, making this a made-to-order non-standard stroke unit. A built-in magnet allows CMSG, DMSG, or EMSG sensors to clamp directly onto the barrel for end-of-stroke or mid-position sensing.
Airtac SCT32-63 Multi-Position Tandem Air Cylinder SCT40X620X50S Technical Specifications
| Model | Airtac SCT32-63 Multi-Position Tandem Air Cylinder SCT40X620X50S |
|---|---|
| Series | SCT multi-position tie-rod cylinder |
| Bore size | Ø40 mm |
| Stroke 1 / Stroke 2 | 620 / 50 mm |
| Total travel | 670 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). This configuration exceeds the 500 mm standard section stroke, so it is a non-standard / made-to-order build. 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) | 620 mm |
| P2 (section 2) | 50 mm |
| P3 (both extended) | 670 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 SCT40X620X50S
| SCT | Multi-position (tandem) tie-rod cylinder series. |
|---|---|
| 40 | Bore size in mm (SCT range 32–100). |
| ×620 | Stroke 1 (section 1) in mm. |
| ×50 | 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 SCT40X620X50S Is Used
Two-Stage Part Diverting
The 50 mm and 620 mm stops allow a diverter gate to reach a close bypass position and a far main-line position from a single actuator, simplifying conveyor routing logic.
Dual-Depth Clamping
A fixture can clamp a thin workpiece at the 50 mm stop and a thick assembly at the 620 mm stop, eliminating manual changeover between part families on the same station.
Sequential Press Operations
The cylinder advances to 50 mm for a light pre-press dwell, then extends to 620 mm for the full forming stroke, all controlled by pressurizing the two sections independently.
Is the Airtac SCT32-63 Multi-Position Tandem Air Cylinder SCT40X620X50S the Right Cylinder?
This four-position SCT replaces setups that would otherwise need two separate 40 mm bore cylinders and external hard stops to achieve the same 0–50–620–670 mm sequence. If the 620 mm stroke introduces a side-load risk due to the extended rod length, consider adding external linear guides or switching to a larger 50 mm bore (982 N push at 0.5 MPa) for improved rigidity. For a direct replacement, match the 40 mm bore, both 620 mm and 50 mm strokes, PT port thread, basic mounting, and the -S magnet suffix exactly.
Multi-position checklist
- ✓ Need 4 repeatable stops?
- ✓ Section strokes 620 + 50 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 SCT40X620X50S FAQ
This tandem cylinder provides four discrete rod positions: 0 mm (fully retracted), 50 mm (secondary stroke only), 620 mm (primary stroke only), and 670 mm (both strokes extended). The stops are fixed by the two section strokes and are not infinitely adjustable.
No. Like all standard pneumatic cylinders, the SCT loses position when air pressure is removed or a valve centers. If the load must be held at an intermediate stop without live pressure, you must add an external rod lock, a pilot-operated check valve, or a mechanical brake.
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