Airtac SE125 Standard Cylinder SE125X425
The AirTAC Airtac SE125 Standard Cylinder SE125X425 is a genuine double-acting ISO 15552 / VDMA 24562 profile-barrel air cylinder with a Ø125mm bore and 425mm 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
- Stroke425 mm
- Port sizePT1/2
- Acting typeDouble acting
- Rod threadM27×2
- CushionAdjustable, 40 mm
About the Airtac SE125 Standard Cylinder SE125X425
The AirTAC SE125X425 is a double-acting single-rod ISO 15552 profile cylinder engineered for heavy-duty linear motion. Operating at 0.5 MPa, it generates 6136 N of push force and 5734 N of pull force, scaling up to a maximum push of 1252 kgf at 1.0 MPa. The extruded aluminum barrel design omits external tie rods, yielding a compact, corrosion-resistant body that mounts flush against machine frames while protecting internal mechanics.
This 125mm bore unit features a robust Ø32 mm piston rod and a PT1/2 port. Because this specific SKU lacks the -S magnet suffix, it does not support direct CMSE or DMSE position sensing without modification. Field-adjustable air cushioning at both ends allows technicians to tune end-of-stroke deceleration via a set screw, softening the impact of heavy 425 mm strokes without relying on fixed rubber bumpers.
Airtac SE125 Standard Cylinder SE125X425 Technical Specifications
| Model | Airtac SE125 Standard Cylinder SE125X425 |
|---|---|
| Series | SE ISO 15552 profile cylinder |
| Bore size | Ø125 mm |
| Stroke | 425 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 SE125X425
| SE | ISO 15552 / VDMA 24562 profile-barrel double-acting cylinder. |
|---|---|
| 125 | Bore size in mm. |
| ×425 | 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 SE125X425 Is Used
Stamping Press Transfer
Drives heavy transfer arms in automated stamping presses, utilizing the 6136 N push force at 0.5 MPa to move large metal blanks between die stations.
Injection Mold Ejection
Provides high-thrust ejection for large injection molding machines, where the 425 mm stroke accommodates deep mold cavities and heavy part removal.
Hydraulic Press Bending
Acts as the primary positioning actuator in heavy-duty press brakes, applying up to 8590 N at 0.7 MPa to hold thick steel plates during bending cycles.
Is the Airtac SE125 Standard Cylinder SE125X425 the Right Cylinder?
Selecting the SE125X425 is appropriate when substantial thrust is required, offering 6136 N push at 0.5 MPa. If a smaller footprint is preferred, stepping down to the 100mm bore yields 3927 N push at 0.5 MPa; conversely, as the largest standard SE size, there is no larger bore option in this series. At 425 mm of travel, the extended Ø32 mm rod and M27x2 thread carry significant side-load potential, so an external guide is recommended to prevent rod-bearing bending. This cylinder is dimensionally interchangeable per ISO 15552, serving as a drop-in replacement for other ISO 15552 cylinders. Note that the adjustable air cushion only decelerates the piston near stroke end and does not function as a lock; if the application must hold a vertical load without live air pressure, a BSE rod lock or external pilot-operated check valve is required.
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 SE125X425 FAQ
The SE125X425 delivers a push force of 6136 N and a pull force of 5734 N at 0.5 MPa. At 0.7 MPa, the push force is 8590 N, and the maximum push capacity is 1252 kgf at 1.0 MPa. The operating speed range for this 125mm bore is 30-500 mm/s.
Yes, it is dimensionally interchangeable per ISO 15552, allowing it to serve as a drop-in replacement for other ISO 15552 cylinders using standard mounting hardware. However, it cannot hold a load mid-stroke if air pressure is lost; the adjustable air cushion only decelerates the piston near the end caps and does not act as a brake.
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