Airtac AIRTAC SC125-160 Standard Cylinder SC125X40
The AirTAC Airtac AIRTAC SC125-160 Standard Cylinder SC125X40 is a genuine double-acting standard air cylinder with a Ø125mm bore and 40mm stroke, PT1/2 air ports and adjustable end cushioning. It is used for push, pull, lift and clamp motion in industrial automation.
- BoreØ125 mm
- Stroke40 mm
- Port sizePT1/2
- Acting typeDouble acting
- Rod threadM27×2
- CushionAdjustable, 28 mm
About the Airtac AIRTAC SC125-160 Standard Cylinder SC125X40
The SC125X40 is a double-acting pneumatic cylinder delivering 6136 N of push force at 0.5 MPa and up to 11045 N at the maximum operating pressure of 0.9 MPa. With a 40 mm stroke and a 32 mm diameter piston rod, this model is built for short, high-force clamping, pressing, or lifting tasks where space along the cylinder axis is limited.
This tie-rod cylinder features a 28 mm adjustable air cushion at each end to decelerate the piston smoothly, reducing end-of-stroke impact. The body length A is 203 mm, resulting in a compact extended length of approximately 243 mm. Ports are PT1/2, and the rod thread is M27x2, suitable for direct attachment of tooling or a rod clevis.
Airtac AIRTAC SC125-160 Standard Cylinder SC125X40 Technical Specifications
| Model | Airtac AIRTAC SC125-160 Standard Cylinder SC125X40 |
|---|---|
| Series | SC big-bore tie-rod cylinder (ISO 6430 class) |
| Bore size | Ø125 mm |
| Stroke | 40 mm |
| Acting type | Double acting |
| Port size | PT1/2 |
| Rod thread | M27×2 |
| 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 – 500 mm/s |
| Cushion | Adjustable, 28 mm |
| Max stroke | Up to 1500 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 (Ø125mm)
| Pressure | Push force | Pull force |
|---|---|---|
| 0.5 MPa | 6136 N | 5734 N |
| 0.7 MPa | 8590 N | — |
| Max (approx.) | 1251 kgf | |
Actual usable force is lower than theoretical due to friction and back-pressure. Size with a safety margin.
Model Code: Airtac AIRTAC SC125-160 Standard Cylinder SC125X40
| SC | Standard tie-rod cylinder series. |
|---|---|
| 125 | Bore size in mm. |
| ×40 | 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 AIRTAC SC125-160 Standard Cylinder SC125X40 Is Used
Heavy-Duty Clamping
The 6136 N force at 0.5 MPa makes this cylinder ideal for welding jigs and assembly fixtures requiring a powerful, short-stroke clamp to hold large workpieces securely during processing.
Die Cushion / Ejection
In metal forming or injection molding, the SC125X40 provides a robust, controlled ejection or stripping force with its 28 mm adjustable cushion, protecting tooling from shock loads at the end of a short, rapid stroke.
Material Stops and Gates
Deploy this cylinder as a high-force stop gate on a heavy-pallet conveyor line. Its short 40 mm stroke and 0.9 MPa thrust capacity of 11045 N can halt and hold heavy loads for sorting or accumulation.
Is the Airtac AIRTAC SC125-160 Standard Cylinder SC125X40 the Right Cylinder?
For applications needing slightly less force in a smaller envelope, stepping down to the SC100 bore provides 3927 N at 0.5 MPa. If even higher force is required within the same ISO 6430 class, the SC160 bore offers 10053 N at 0.5 MPa. Always ensure the load is guided externally if side forces are present, as the piston rod bearing is designed for axial loads.
To guarantee a correct replacement, match five key points: the 125 mm bore, the 40 mm stroke, the PT1/2 port thread, the basic mounting configuration (no accessory bracket), and the absence of a built-in magnet. This model uses standard TPU seals and PT threads.
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 AIRTAC SC125-160 Standard Cylinder SC125X40 FAQ
At 0.7 MPa (7 bar) operating pressure, the SC125X40 double-acting cylinder generates a theoretical push force of 8590 N. The pull force on the retract stroke is 5734 N at the same pressure, due to the area reduction from the 32 mm piston rod.
No. The AirTAC SC series is a tie-rod cylinder and is dimensionally shorter than a standard ISO 15552 profile cylinder. It is not a drop-in ISO 15552 replacement. It will directly replace another AirTAC SC125 tie-rod cylinder with the same stroke, PT port thread, and basic mounting configuration.
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