Airtac SC40 Standard Cylinder SC40X125
The AirTAC Airtac SC40 Standard Cylinder SC40X125 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 SC40X125
The SC40X125 is a 40 mm bore, 125 mm stroke double-acting pneumatic cylinder from the AirTAC SC tie-rod series. At 0.5 MPa it generates 628 N pushing force and 528 N pulling force, providing a compact yet powerful linear drive for medium-duty automation tasks.
This model uses a 16 mm diameter piston rod with M12x1.25 male threads and PT1/4 ports. The adjustable air cushion at each end is 21 mm long, and the body length A measures 142 mm, giving a total extended length of approximately 267 mm. Standard TPU seals suit operating temperatures from -20 to +70 °C.
Airtac SC40 Standard Cylinder SC40X125 Technical Specifications
| Model | Airtac SC40 Standard Cylinder SC40X125 |
|---|---|
| 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 SC40X125
| 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 SC40X125 Is Used
Small Part Diverting
Pushes lightweight packages or components off a conveyor line with 628 N of force at 0.5 MPa, ideal for sorting and routing in packaging cells.
Clamping & Fixturing
Applies consistent holding pressure for jigs and assembly fixtures. The 125 mm stroke provides ample clearance for part loading and unloading.
Press-Fit Assembly
Delivers up to 1130 N at 0.9 MPa for pressing bearings, bushings, or pins into housings in benchtop automation stations.
Is the Airtac SC40 Standard Cylinder SC40X125 the Right Cylinder?
Choose the SC40X125 when your load requires around 628 N of thrust at standard plant pressure. If you need more force, the SC50 series delivers 982 N at 0.5 MPa; for a lighter, more compact solution the SC32 provides 402 N. Always match the replacement cylinder on all five key points: bore (40 mm), stroke (125 mm), PT port thread, basic mounting (no bracket), and the absence of a magnet.
At 125 mm stroke the rod is well supported within the standard stroke range, but avoid direct side loading. For applications where the load is not guided, consider adding an external linear guide to protect the rod bearing and seals from premature wear.
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 SC40X125 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, if the original is an AirTAC SC40X125 with PT ports, basic mounting, and no magnet. This is a tie-rod cylinder, not an ISO 15552 profile cylinder, so it will not drop into an ISO 15552 footprint. Verify your port thread (PT vs. G) and mounting style before ordering.
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