Airtac SCT32-63 Multi-Position Tandem Air Cylinder SCT40X125X450SN
The AirTAC Airtac SCT32-63 Multi-Position Tandem Air Cylinder SCT40X125X450SN is a genuine double-acting MULTI-POSITION (tandem) air cylinder: two piston sections of 125mm and 450mm give 4 controllable stop positions across a 575mm total travel, with a Ø40mm bore, PT1/4 ports and adjustable end cushioning.
- BoreØ40 mm
- Stroke 1125 mm
- Stroke 2450 mm
- Total travel575 mm
- Positions4 stops
- Port sizePT1/4
About the Airtac SCT32-63 Multi-Position Tandem Air Cylinder SCT40X125X450SN
The SCT40X125X450SN is a tandem multi-position cylinder that delivers four distinct rod stops without external hard stops. By pressurising one or both 40 mm bore sections, the rod locates at 0 mm (fully retracted), 125 mm, 450 mm, or the combined 575 mm total travel. Each piston section provides 628 N of push force at 0.5 MPa, making it a compact alternative to two separate actuators for sequenced linear moves.
This model includes a built-in magnet for direct mounting of CMSG/DMSG/EMSG sensors and uses NBR seals for standard temperature resilience. The 16 mm diameter rod and 21 mm adjustable air cushion at each end support smooth deceleration. The body length A(SCT) is 235 mm, and the cylinder operates reliably between 0.15 and 1.0 MPa with filtered air.
Airtac SCT32-63 Multi-Position Tandem Air Cylinder SCT40X125X450SN Technical Specifications
| Model | Airtac SCT32-63 Multi-Position Tandem Air Cylinder SCT40X125X450SN |
|---|---|
| Series | SCT multi-position tie-rod cylinder |
| Bore size | Ø40 mm |
| Stroke 1 / Stroke 2 | 125 / 450 mm |
| Total travel | 575 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) | 125 mm |
| P2 (section 2) | 450 mm |
| P3 (both extended) | 575 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 SCT40X125X450SN
| SCT | Multi-position (tandem) tie-rod cylinder series. |
|---|---|
| 40 | Bore size in mm (SCT range 32–100). |
| ×125 | Stroke 1 (section 1) in mm. |
| ×450 | 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 SCT40X125X450SN Is Used
Two-Stage Diverter Gate
Positions a diverter chute at 125 mm for one bypass lane and 450 mm for a second, with the combined 575 mm stroke reaching a third sorting destination.
Multi-Depth Pressing Station
Provides a 125 mm pre-press position and a 450 mm final forming depth, using the 0 mm retracted stop for part loading and unloading.
Sequential Part Feeding
Advances a workpiece 125 mm for a first operation, then extends to 450 mm for a secondary process, with the full 575 mm travel used for part ejection.
Is the Airtac SCT32-63 Multi-Position Tandem Air Cylinder SCT40X125X450SN the Right Cylinder?
Choose the SCT40X125X450SN when your process needs a 125 mm advance, a 450 mm secondary feed, and a combined 575 mm stroke from one tie-rod assembly. It eliminates the complexity of sequencing two separate cylinders and saves mounting space. If the 628 N push per section at 0.5 MPa is marginal, stepping up to the 50 mm bore SCT50 series provides 982 N per section at the same pressure. For direct replacement, match the 40 mm bore, both 125 mm and 450 mm strokes, PT port thread, basic mounting, and the -S magnet option. With the 450 mm section stroke, ensure the guided load is aligned to prevent rod bending and side-load wear.
Multi-position checklist
- ✓ Need 4 repeatable stops?
- ✓ Section strokes 125 + 450 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 SCT40X125X450SN FAQ
This tandem cylinder provides four distinct mechanical stops: 0 mm (fully retracted), 125 mm (section one extended), 450 mm (section two extended), and 575 mm (both sections extended). The positions are fixed by the two stroke lengths and are not infinitely adjustable.
Each of the two piston sections delivers 628 N of push force and 528 N of pull force when operated at 0.5 MPa. The cylinder does not combine the force of both sections for a single push; each section acts independently to achieve the multi-position stops.
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