Airtac SE125 Standard Cylinder SE125X300
The AirTAC Airtac SE125 Standard Cylinder SE125X300 is a genuine double-acting ISO 15552 / VDMA 24562 profile-barrel air cylinder with a Ø125mm bore and 300mm stroke, PT1/2 air ports and adjustable end cushioning. Its standardized mounting interface makes it a drop-in replacement for other ISO 15552 cylinders in automation lines.
- BoreØ125 mm
- Stroke300 mm
- Port sizePT1/2
- Acting typeDouble acting
- Rod threadM27×2
- CushionAdjustable, 40 mm
About the Airtac SE125 Standard Cylinder SE125X300
The AirTAC SE125X300 is a double-acting, single-rod ISO 15552 profile cylinder engineered for heavy-duty pneumatic actuation. It provides a substantial 6136 N push force at 0.5 MPa and features a robust Ø32 mm piston rod with an M27x2 thread. The square extruded aluminum barrel omits external tie rods, yielding a compact, corrosion-resistant body that mounts flush against machine frames while surviving high-impact industrial environments.
This 125 mm bore unit operates at speeds of 30-500 mm/s and relies on field-adjustable pneumatic cushioning at both ends to decelerate heavy 300 mm strokes smoothly. Because this specific SKU lacks the -S magnet code, it does not support internal CMSE or DMSE position sensing out of the box. The cushioning is a real adjustable screw mechanism, not a fixed rubber bumper, allowing precise tuning of end-of-stroke deceleration for massive moving loads.
Airtac SE125 Standard Cylinder SE125X300 Technical Specifications
| Model | Airtac SE125 Standard Cylinder SE125X300 |
|---|---|
| Series | SE ISO 15552 profile cylinder |
| Bore size | Ø125 mm |
| Stroke | 300 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 (0–150 °C with FKM seals) |
| Speed range | 30 – 500 mm/s |
| Cushion | Adjustable, 40 mm |
| Max stroke | Up to 1500 mm |
Specifications follow the official AirTAC SE series datasheet and ISO 15552 / VDMA 24562 dimensions. Confirm against the product label before installation. Port options: PT (standard) / G (BSPP).
Theoretical Output Force (Ø125mm)
| Pressure | Push force | Pull force |
|---|---|---|
| 0.5 MPa | 6136 N | 5734 N |
| 0.7 MPa | 8590 N | — |
| Max (@1.0 MPa) | 1251 kgf | |
Actual usable force is lower than theoretical due to friction and back-pressure. Size with a safety margin.
Model Code: Airtac SE125 Standard Cylinder SE125X300
| SE | ISO 15552 / VDMA 24562 profile-barrel double-acting cylinder. |
|---|---|
| 125 | Bore size in mm. |
| ×300 | Stroke length in mm. |
| -S | Optional built-in magnet for CMSE / DMSE sensor sensing. |
Rod material: carbon steel (blank) / SUS420J2 (A) / SUS304 (B). Seals: TPU (blank) / FKM high-temp (H) / NBR (N). Thread: PT (blank) / G. Mounting: Basic, LB, FA, FB, CA, CB, CR, TC, FTC, TCM1, TCM2. Related SE-family variants: SED (double rod), SEJ (adjustable stroke), BSE (rod lock), BSED (double-rod rod lock).
Where the Airtac SE125 Standard Cylinder SE125X300 Is Used
Automotive Body Welding Clamp
Leverages the 6136 N push force to securely hold heavy steel panels during robotic spot-welding, absorbing high shock loads via the adjustable cushion.
Heavy Press Straightener
Utilizes the 300 mm stroke and 1252 kgf max output to deform thick metal brackets and shafts in heavy industrial straightening presses.
Palletizer Ejection Arm
Drives large cardboard or metal pallet ejection mechanisms in high-throughput packaging lines, relying on the tie-rod-free profile to resist factory dust.
Is the Airtac SE125 Standard Cylinder SE125X300 the Right Cylinder?
Selecting the SE125X300 places you at the top of the standard SE range, delivering 6136 N push at 0.5 MPa (8590 N at 0.7 MPa). If your application requires less force, stepping down to the 100 mm bore yields 3927 N push at 0.5 MPa; as the largest standard bore, there is no larger SE size available. For positioning accuracy without live air pressure, note that a plain SE cylinder will drift when air is lost—consider the BSE series for a dedicated rod lock. At 300 mm stroke, the unsupported mass and leverage on the Ø32 mm rod bearing increase bending risks, so utilizing an external guide rail is strongly recommended to prevent premature seal wear.
As a true ISO 15552 profile cylinder, it is dimensionally interchangeable with other ISO 15552 cylinders, allowing you to reuse existing FA front flange or LB foot mounting hardware without redesigning the machine envelope. The fluid port is PT1/2.
Quick checklist
- ✓ Required force at your working pressure
- ✓ Stroke and mounting space
- ✓ Port/thread type (PT/G)
- ✓ Magnet (-S) for CMSE/DMSE 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 (LB/FA/FB/CA/CB/CR/TC/FTC/TCM1/TCM2).
- check Installation by qualified personnel per AirTAC docs.
Airtac SE125 Standard Cylinder SE125X300 FAQ
The SE125X300 generates 6136 N push and 5734 N pull at 0.5 MPa, 8590 N push at 0.7 MPa, and a maximum push force of 1252 kgf at 1.0 MPa. The operational speed range for this 125 mm bore is 30-500 mm/s.
Yes, it is dimensionally interchangeable per ISO 15552 standards, allowing a drop-in replacement for other ISO 15552 profile cylinders using existing mounting hardware. However, it does not hold position when air is lost; if you need fail-safe load holding, look at the AirTAC BSE rod lock series instead.
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