Airtac SC40 Standard Cylinder SC40X125SFA
The AirTAC Airtac SC40 Standard Cylinder SC40X125SFA is a genuine double-acting standard air cylinder with a Ø40mm bore and 125mm stroke, PT1/4 air ports and adjustable end cushioning. It is used for push, pull, lift and clamp motion in industrial automation.
- BoreØ40 mm
- Stroke125 mm
- Port sizePT1/4
- Acting typeDouble acting
- Rod threadM12×1.25
- CushionAdjustable, 21 mm
About the Airtac SC40 Standard Cylinder SC40X125SFA
The SC40X125SFA is a double-acting pneumatic cylinder delivering 628 N of push force at 0.5 MPa, making it a solid mid-range actuator for general factory automation. This model features a 40 mm bore, a 125 mm stroke, and a 16 mm diameter piston rod with M12x1.25 male threads for tooling attachment.
It is configured with a built-in magnet (-S suffix) for direct mounting of CMSG/DMSG/EMSG sensors, and an FA front rectangular flange (F-SC40FA) for rigid panel mounting on the rod side. The adjustable air cushion at each end decelerates the piston smoothly, protecting end caps during high-cycle operation.
Airtac SC40 Standard Cylinder SC40X125SFA Technical Specifications
| Model | Airtac SC40 Standard Cylinder SC40X125SFA |
|---|---|
| Series | SC standard tie-rod cylinder |
| Bore size | Ø40 mm |
| Stroke | 125 mm |
| Acting type | Double acting |
| 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 | Up to 1200 mm |
Specifications follow the official AirTAC SC series datasheet. Operating pressure 0.15–1.0 MPa, proof pressure 1.5 MPa, temperature −20 to +70 °C. Confirm against the product label before installation. Thread options: PT (standard) / G.
Theoretical Output Force (Ø40mm)
| Pressure | Push force | Pull force |
|---|---|---|
| 0.5 MPa | 628 N | 528 N |
| 0.7 MPa | 880 N | — |
| Max (approx.) | 128 kgf | |
Actual usable force is lower than theoretical due to friction and back-pressure. Size with a safety margin.
Model Code: Airtac SC40 Standard Cylinder SC40X125SFA
| SC | Standard tie-rod cylinder series. |
|---|---|
| 40 | Bore size in mm. |
| ×125 | Stroke length in mm. |
| -S | Optional built-in magnet for sensor position sensing. |
Related variants: SCD (double rod), SCJ (adjustable stroke), SCT (multi-position). Seals: TPU standard / H = Viton / N = NBR. Thread: blank = PT, G = G thread.
Where the Airtac SC40 Standard Cylinder SC40X125SFA Is Used
Pick-and-Place Gantry
The 125 mm stroke and front-flange mount suit vertical Z-axis modules on small gantry robots, where the built-in magnet confirms end-of-stroke via solid-state sensors.
Diverter Gate Actuation
With 628 N of push force at 0.5 MPa, this cylinder reliably shifts light to medium product diverters on packaging conveyors, aided by the adjustable cushion for quiet gate stopping.
Clamping & Press Fixtures
The FA flange bolts directly to a fixture plate, providing a stable, guided push for clamping parts during assembly or light press-fit operations at up to 879 N at 0.7 MPa.
Is the Airtac SC40 Standard Cylinder SC40X125SFA the Right Cylinder?
Choose the SC40 when your application needs between 400 and 900 N of force at typical plant air pressures; the 40 mm bore bridges the gap between the lighter 32 mm (402 N at 0.5 MPa) and the heavier 50 mm (982 N at 0.5 MPa). For strokes longer than 300 mm, consider an external guide rail to protect the 16 mm rod from side-load bending, as tie-rod cylinders are designed for axial thrust, not transverse forces.
To replace an existing unit, match five points exactly: 40 mm bore, 125 mm stroke, PT port thread, FA front-flange mounting, and the -S magnet option for sensor compatibility. This ensures the same envelope, port location, and control interface without re-engineering the machine.
Quick checklist
- ✓ Required force at your working pressure
- ✓ Stroke and mounting space
- ✓ Port/thread type (PT/NPT/G)
- ✓ Magnet (-S) for sensors?
- ✓ Side load — consider a guided cylinder
Installation & Maintenance Notes
- check Use clean air filtered to 40µm or finer.
- check Keep within 0.15 – 1.0 MPa operating pressure.
- check Avoid side load on the piston rod.
- check Adjust end cushion screws for smooth stops.
- check Use correct mounting accessory (FA/FB/CA/CB/LB/TC).
- check Installation by qualified personnel per AirTAC docs.
Airtac SC40 Standard Cylinder SC40X125SFA FAQ
At 0.5 MPa the cylinder pushes with 628 N and pulls with 528 N. At the maximum operating pressure of 0.9 MPa, the push force reaches 1130 N. The theoretical maximum at 1.0 MPa is 128 kgf.
Yes. The -S suffix indicates a built-in magnet inside the piston, allowing AirTAC CMSG (reed) or DMSG/EMSG (solid-state) sensors to clamp directly onto the tie-rod barrel for non-contact position sensing.
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